Fluid Pressure Control Patents (Class 123/502)
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Patent number: 4475519Abstract: A fuel injection system is proposed which serves to inject fuel into the combustion chambers of internal combustion engines. The fuel injection system includes at least one inlet and one outlet line each for the fuel, at least one pump piston to supply the fuel to an injection valve, and at least one apparatus to adjust a parameter of the injection system, such as instant of injection, or quantity of injection, or both. Furthermore, the fuel injection system includes an electro-fluidic transducer which can be controlled by an electronic control device, the electro-fluidic transducer acting to adjust the desired parameter.Type: GrantFiled: September 18, 1981Date of Patent: October 9, 1984Assignee: Robert Bosch GmbHInventors: Franz Eheim, Wolfgang Fehlmann
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Patent number: 4474156Abstract: A governor mechanism for controlling the setting of a fuel control member of a fuel pump includes a first lever located about a pivot. One end of the first lever is connected to the fuel control member and the first lever is urged in a direction to reduce the fuel delivered by a centrifugal mechanism. A second lever is engageable by the first lever and is urged in a direction to increase the amount of fuel delivered by a pre-stressed governor spring. The extent of movement of the second lever by the governor spring is limited by a maximum fuel stop and the pivot of the first lever is resiliently located by a spring which as the speed increases allows the pivot to move to increase the maximum amount of fuel which can be supplied by the fuel pump.Type: GrantFiled: April 7, 1983Date of Patent: October 2, 1984Assignee: Lucas Industries public limited companyInventor: Colin P. Brotherston
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Patent number: 4473053Abstract: Pressure chambers are provided at opposite sides of a piston for moving a roller shaft of a timer, fuel is selectively introduced into the respective pressure chambers by a control valve or a solenoid valve, and surplus fuels in the respective pressure chambers are discharged in accordance with a movement value of the piston, so that an injection time can be controlled without being affected by fuel pressure.Type: GrantFiled: September 30, 1982Date of Patent: September 25, 1984Assignee: Toyota Jidosha Kabushiki KaishaInventor: Kazuo Shinoda
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Patent number: 4470397Abstract: A fuel injection pumping apparatus has a high pressure pump to which fuel is supplied by a low pressure pump, the output pressure of which is controlled. The high pressure pump includes a piston which controls the timing of the high pressure pump. The pressure applied to the piston is controlled by valve means which includes a valve member biased by a spring. A solenoid is associated with an armature connected to the valve member and when the solenoid is energized the valve member is moved to increase the pressure applied to the piston. The valve member is also subjected to the fuel pressure developed by the low pressure pump and in the event that the flow of current in the solenoid ceases the valve member can move against the spring to allow a controlled pressure to be applied to the piston.Type: GrantFiled: October 28, 1982Date of Patent: September 11, 1984Assignee: Lucas Industries Public Limited CompanyInventor: Colin P. Brotherston
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Patent number: 4470398Abstract: A fuel injection pumping apparatus for supplying fuel to an internal combustion engine comprises a throttle element 21 for controlling fuel flow between a low pressure and a high pressure pump the latter delivering fuel in timed relationship to the associated engine. The high pressure pump includes a piston movable to control the timing of injection of fuel to the engine. A valve member is movable to control the pressure applied to the piston and the valve member is movable against the action of a spring by fuel pressure, and the force exerted by the spring depends on the position of a lever movable about a fulcrum. The fulcrum is adjustable by a device and the lever is movable about the fulcrum by a cam surface on a slidable member the position of which is determined by an operator adjustable member forming part of a fuel control which determines the setting of the throttle element.Type: GrantFiled: February 24, 1983Date of Patent: September 11, 1984Assignee: Lucas Industries Public Limited CompanyInventor: Dorian F. Mowbray
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Patent number: 4469066Abstract: A pressure sensitive member (68) is operatively connected to a pressure regulator assembly (80, 100) through a cam section (64b) of a control pin (64) and a follower pin (76). The pressure regulator assembly (80, 100) regulates a fuel pressure inside a chamber (12a) of a pump housing (12) upon a change of a pressure acting on the pressure sensitive member (68), thereby compensating a timing of fuel injection determined by an injection timing control member (24). The pressure acting on the pressure sensitive member (68) is an atmospheric pressure or a boost pressure. The pressure regulator (80, 100) is adjustable to either advance or retard the injection timing as desired in conformity with an atmospheric pressure or a boost pressure, or to vary the point at which the fuel pressure in the pump chamber (12a) starts to be varied.Type: GrantFiled: May 7, 1982Date of Patent: September 4, 1984Assignee: Diesel Kiki Company, Ltd.Inventor: Yasutaka Yuzawa
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Patent number: 4462361Abstract: An apparatus for generating a fuel quantity signal in an injection pump is proposed, which is provided with a pump piston deflected by a cam disk which aspirates fuel out of a fuel inlet conduit provided with a magnetic valve and expresses it into a supply line. The metered fuel quantity is obtained on the basis of a metering onset signal and an end-of-metering signal, the first being generated by a position-sensor apparatus cooperating with the pump piston and the second being derived from the voltage applied at the magnetic valve.Type: GrantFiled: September 21, 1982Date of Patent: July 31, 1984Assignee: Robert Bosch GmbHInventors: Anton Karle, Helmut Laufer
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Patent number: 4462370Abstract: A fuel injection pumping apparatus of the axially slidable rotary distributor type includes a cup shaped member mounted on a drive shaft and a distributor member which as a bore containing pumping plungers. The outward movement of the plungers is controlled by a tapered surface on the interior of the cup shaped member which co-acts with complementary surfaces on cam followers, disposed between the plungers and a surrounding cam ring. The slots in the cup shaped member which accommodate the followers are of helical or like form and the distributor member is driven angularly by tongues which are secured to the distributor member and which locate in the slots. As the distributor member moves axially it is also moved angularly by the action of the helical slots so that the timing of delivery of fuel remains constant.Type: GrantFiled: December 17, 1981Date of Patent: July 31, 1984Assignee: Lucas Industries LimitedInventor: Boaz A. Jarrett
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Patent number: 4459963Abstract: A fuel injection apparatus in which the duration of fuel supply of at least two pump pistons of a fuel injection pump is determined by the closing duration of an electrically actuated overflow valve. The overflow conduits of at least two adjacent pump work chambers are interconnected, and the return flow of fuel from these overflow conduits to a chamber of lower pressure is controllable by the control element of the overflow valve which is common to these overflow conduits. The overflow conduits are each provided with one barrier valve, by means of which the at least one pump work chamber not under injection pressure at a given time can be blocked off from the pump work chamber which is placed under injection pressure at that time.Type: GrantFiled: March 26, 1982Date of Patent: July 17, 1984Assignee: Robert Bosch GmbHInventors: Werner Gross, Max Straubel
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Patent number: 4458652Abstract: A distributor type fuel injection pump which is provided with an eccentric connecting member coupling the timer piston of the injection timing control device to the roller holder. The eccentric connecting member comprises a first portion and a second portion eccentrically combined together. The first portion engages with the roller holder to support a predetermined one of the rollers on the roller holder, which is rotatably fitted thereon, whereas the second portion pivotably engages with the timer piston. Further provided is means for prohibiting pivotal movement of the second portion of the eccentric connecting member about the first portion of same relative to the roller holder. Displacement of the timer piston causes accurately corresponding circumferential displacement of the roller holder through the eccentric connecting member and the pivotal movement-prohibiting means to thereby achieve accurate control of the injection timing in response to the rotational speed of the engine.Type: GrantFiled: June 6, 1983Date of Patent: July 10, 1984Assignee: Diesel Kiki Co., Ltd.Inventors: Osamu Shiozawa, Hachiro Aoki, Seizi Takahashi
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Patent number: 4457284Abstract: A fuel injection pump having a mechanically adjustable servo valve for controlling the timing of the pumping event is disclosed. A pivoted lever has one end which engages the spring seat of a timing control plunger servo valve which is also subjected to a speed related hydraulic signal and another end in the form of a bimetal strip which engages a cam clamped on the throttle shaft to pivot the lever according to the rotational position of the shaft. The profile of the cam is such as to retard the timing of the pumping stroke when the charge delivered by the pump is increased to delay pressure built up in the pump so that injection pressure in the associated nozzle is reached at a scheduled crankshaft angle regardless of variations in speed and load on the engine. A heater for the bimetal strip is provided to shift the servo spring seat to change the timing of injection upon demand or automatically under a prescribed engine operation condition. In one embodiment, the bimetal provides 3.degree.-4.degree.Type: GrantFiled: June 7, 1979Date of Patent: July 3, 1984Assignee: Stanadyne, Inc.Inventor: Daniel E. Salzgeber
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Patent number: 4453522Abstract: Apparatus is provided for temporarily advancing the timing of a fuel injection pump of the type having timing means responsive to a source of fuel under pressure correlated with the speed of an associated engine and also to the pressure of fuel in the pump housing. Valve means is provided for venting the pump housing which means may be manually or automatically actuated such as by use of a solenoid.Type: GrantFiled: April 28, 1980Date of Patent: June 12, 1984Assignee: Stanadyne, Inc.Inventor: Daniel E. Salzgeber
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Patent number: 4450818Abstract: A hydraulic injection-adjusting device for high pressure injection installations in auto-igniting internal combustion engines. Oil is supplied to operating chambers of the injection-adjusting device by means of a pressure supply pump with an electrically actuatable regulating valve being provided for controlling the flow of oil to inlet of the operating chambers. An electronic control unit is supplied on an input side which signals corresponding to current engine operating parameters with the control unit yielding on an output side thereof a desired value for the regulating valve to apply pressure in a controlled fashion to the injection-adjusting device. An arrangement is provided for measuring the actual value of the adjustment angle at the injection-adjusting device by constant answer-back line provides a feed of the actual value to the control unit.Type: GrantFiled: August 11, 1980Date of Patent: May 29, 1984Assignee: Daimler-Benz AktiengesellschaftInventors: Frank Thoma, Karl-Heinz Hoffmann, Christoph Burckhardt
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Patent number: 4450819Abstract: The present invention relates to a device for adjusting the injection timing of a distribution-type fuel injection pump for internal combustion engines. In the device of the present invention in which an adjusting piston is moved responsive to the fuel pressure in the high-pressure oil chamber and the resilient force of the timer spring, and the roller ring is rotated following the movement of the adjusting piston, the improvement comprises a cylinder which is provided in addition to a cylinder that accommodates the adjusting piston, and a shaft which slides in the above cylinder separately from the adjusting piston, so that the position of the adjusting piston can be adjusted by the shaft. The device employs sliding portions that do not require strict machining precision. Further, when the fuel injection pump is to be mounted on the engine, the initial timing can be easily adjusted through manipulation effected from the outer side of the fuel injection pump.Type: GrantFiled: May 11, 1982Date of Patent: May 29, 1984Assignee: Nippondenso Co., Ltd.Inventors: Yasuhiro Furuhashi, Naozi Ishikawa, Shizuo Kawai
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Patent number: 4448174Abstract: A distributor type fuel injection pump which is provided with an eccentric connecting member coupling the timer piston of the injection timing control device to the roller holder. The eccentric connecting member comprises a first portion and a second portion eccentrically combined together. The first portion engages with the roller holder to support a predetermined one of the rollers on the roller holder, which is rotatably fitted thereon, whereas the second portion pivotably engages with the timer piston. Displacement of the timer piston causes corresponding circumferential displacement of the roller holder through the eccentric connecting member to thereby vary the fuel injection timing.Type: GrantFiled: February 18, 1983Date of Patent: May 15, 1984Assignee: Diesel Kiki Co., Ltd.Inventors: Seizi Takahashi, Hachiro Aoki
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Patent number: 4445484Abstract: A mechanical fuel injection device having a pumping piston and a pressure chamber ahead of the piston and connected to at least one injector by means of a linking channel. A slide valve is fitted to slide in a bore the central part of which crosses the linking channel. The slide valve is subject to the biasing action of spring means and to that of a pressure chamber. In the rest position of the slide valve, the linking channel communicates with a fuel feed circuit. A control pressure applied in the chamber moves the slide valve forward, blocking the circuit, but allowing injection by means of a circular throat allowing the fuel to flow along the linking channel.Type: GrantFiled: April 30, 1981Date of Patent: May 1, 1984Assignee: Renault Vehicules IndustrielsInventor: Gerard Marion
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Patent number: 4432326Abstract: The invention relates to a device for automatically controlling the start of the delivery of an injection-pump for an internal-combustion engine and comprises, as the control member, a tridimensional planar cam (24) mounted on a slider (10) for being shifted along a first direction as a function of the rate of flow of delivery of the fuel to the engine and, along a second direction, perpendicular to the former, as a function of the pump rpm.Type: GrantFiled: April 14, 1982Date of Patent: February 21, 1984Assignee: SPICA S.p.A.Inventor: Manuel Roca-Nierga
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Patent number: 4432327Abstract: A fuel injection pump having a timing piston shiftable for establishing the fuel injection timing, a servo valve piston for hydraulically positioning the timing piston, biased in the advance direction by a speed correlated fluid pressure, engine load responsive means acting through a compression spring to bias the servo valve piston in the retard direction, a bleed valve for establishing a regulated fuel pressure biasing the servo piston in the retard direction, the bleed valve being biased in its opening direction by the regulated pressure, and bleed valve control means responsive to continuous measurements of one or more operating parameters of an associated engine and acting through a compression spring to variably bias the bleed valve in its closing direction.Type: GrantFiled: March 4, 1982Date of Patent: February 21, 1984Assignee: Stanadyne, Inc.Inventor: Daniel E. Salzgeber
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Patent number: 4430974Abstract: A fuel injection pump for an internal combustion engine is proposed having an adjustment piston for the adjustment of the onset of the injection, on which an rpm-proportional fuel pressure determined by a pressure control valve and a pressure valve placed behind it and controllable in dependence on temperature acts. An adjustment device controls a full load stop for the limitation of the full-load fuel maximally injected by the fuel injection pump. The adjustment device has a movable piston for this purpose disposed movably in a work bore. The circumference of the piston is formed as a cam and is scanned by a scanner determining the position of the full load stop. The movable piston is acted on one side by the fuel pressure in the suction chamber and on the other side by a spring and by the fuel pressure between the pressure control valve and the pressure valve. This results in a compensation of the fuel pressure force at the movable piston, which is caused by the pressure valve.Type: GrantFiled: September 14, 1982Date of Patent: February 14, 1984Assignee: Robert Bosch GmbHInventors: Gunter Bofinger, Werner Faupel
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Patent number: 4427152Abstract: A fuel injector is provided for each cylinder of an internal combustion engine, the injector including an electronically operated control valve disposed between supply passage and a timing chamber to control the admission of fuel into and out of the timing chamber. A primary pumping piston and a secondary floating piston are axially spaced within the central bore of the injection body, and a normally closed injection nozzle is situated at one end of the injector body. A mechanical linkage associated with the camshaft of the engine drives the primary pumping piston against the bias of a main spring. The timing chamber is defined between the pistons and a metering chamber is defined between the secondary piston and the nozzle.Type: GrantFiled: July 13, 1981Date of Patent: January 24, 1984Assignee: The Bendix CorporationInventors: Albert E. Sisson, Donald J. Lewis
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Patent number: 4425896Abstract: A fuel injection advance apparatus comprising a rotational hub connected to a cam shaft of a fuel injection device, an engine-driven rotatable casing which is supported on the hub, eccentric cam assemblies located between the hub and the casing to adjust a relative angular position therebetween, a hydraulic piston having an inclined surface which is connected to an engine-driven pump, and slides having inclined surfaces corresponding to and contacting the inclined surface of the piston so that the axial movement of the piston is converted to the radial movements of the slides, said slides being connected to the eccentric pins.Type: GrantFiled: March 15, 1982Date of Patent: January 17, 1984Assignee: Nippondenso Co., Ltd.Inventor: Fumiaki Murayama
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Patent number: 4422428Abstract: An injection initiation adjuster for fuel injection pumps is proposed which includes a hydraulically actuated adjustment piston, whereby the actuation fluid is controllable via a control plunger disposed coaxially with the adjustment piston and this control plunger is electromagnetically adjustable.Type: GrantFiled: June 7, 1979Date of Patent: December 27, 1983Assignee: Robert Bosch GmbHInventor: Franz Eheim
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Patent number: 4422424Abstract: A fuel injection pump (100) including a plunger (2) and a piston (1) movably disposed in a pumping chamber (17), means for initiating (3, 5) fuel injection and means for terminating (13, 30, 29) fuel injection, the plunger periodically pressurizing fuel in a pressure chamber (44) and the piston (1) spaced from the plunger and allowing a metering chamber (16) to fill with a metered quantity of fuel to be injected to an engine. The means for initiating injection comprise a pilot valve (5) having a solenoid to selectively operate between either of two states and a spool valve (3) movable between first and second positions in response to the state of pilot valve (5), the first position filling the metering chamber with the metered quantity of fuel. The pilot valve (5) determines the fuel quantity to be delivered to the engine relative to a signal from an electronic controller. An accumulator (4) is pressurized during each cycle of the plunger to provide pressurized fuel during a metering phase.Type: GrantFiled: June 23, 1981Date of Patent: December 27, 1983Assignee: The Bendix CorporationInventor: Douglas A. Luscomb
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Patent number: 4421084Abstract: A fuel injection pumping apparatus includes a governor which controls the size of an orifice through which fuel is supplied to an injection pump to determine the amount of fuel supplied by the pump to an associated engine. The governor includes a piston which at one end is subjected to fuel pressure and which bears at its other end against a spring connected in series with a spring. The spring is weaker than the spring so that at idling speed it is the spring which balances the force acting on the piston. Manually operable means is provided to effect movement of an abutment disposed between the springs, the spring acting to determine the maximum speed of the associated engine. When the engine has been started from cold, it is desirable to provide additional fuel to enable the engine to idle properly and for this purpose a device represented by the arrow, moves the end of the spring remote from the spring and this provides a temporary increase in the amount of fuel supplied at idling speeds.Type: GrantFiled: March 17, 1978Date of Patent: December 20, 1983Assignee: Lucas Industries LimitedInventors: Brian E. Broadwith, Robert T. J. Skinner
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Patent number: 4419977Abstract: A hydraulic advance device for selectively transmitting applied forces to a fuel injector of an internal combustion engine. The device is operative to select a normal or advanced timing of the fuel injection. An outer cylindrical body (66) is mounted in the upper end of a fuel injector adapter. An inner body (108) is slidably received in an outer body and a pressure responsive plunger (104) is slidably received in a bore formed in the inner body and defines in cooperation therewith a fluid chamber (128). A one-way valve (132) in the chamber permits fluid above a predetermined pressure applied during the advanced stage of the fuel injection cycle to enter the chamber which prevents movement of the plunger relative to the inner body member.Type: GrantFiled: May 18, 1982Date of Patent: December 13, 1983Assignee: Eaton CorporationInventor: George A. Hillebrand
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Patent number: 4419054Abstract: A liquid fuel injection pumping apparatus of the rotary distributor type includes a cam ring which is angularly adjustable to vary the timing of delivery of fuel. The setting of the cam ring is determined by a piston in which is located a servo valve. The servo-valve has a land to control fluid flow into a cylinder containing the piston. The servo valve is spring biased and a wedge is provided between a cylindrical member engaged by a spring and the servo-valve, the wedge being movable to alter the distance of the portion of the land which controls fluid flow of the servo valve. The wedge is coupled to the output member of a speed responsive device, the output member also being coupled to a fuel quantity control of the apparatus so that the setting of the cam ring depends upon the amount of fuel delivered by the apparatus.Type: GrantFiled: May 7, 1981Date of Patent: December 6, 1983Assignee: Lucas Industries LimitedInventors: Stanislaw J. A. Sosnowski, Robert T. J. Skinnger
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Patent number: 4417554Abstract: A fuel injection timer or regulator for a fuel injection pump is acted upon by a signal of an actual value generator detecting an actual injection time adjustment and by a signal of a desired value generator controlled by operating parameters of a piston internal combustion engine. At least one sensor is arranged at the piston internal combustion engine, with the sensor determining a rate of increase of the combustion pressure in the cylinder at each working stroke, and the desired value generator is controlled in dependence upon the output signal of the sensor.Type: GrantFiled: January 18, 1982Date of Patent: November 29, 1983Assignee: Motoren-und Turbinen-Union Friedrichshafen GmbHInventor: Hans Dinger
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Patent number: 4409941Abstract: A control system for adjusting the fuel injection pump and other auxiliary assemblies associated with a fuel injected internal combustion engine includes a mechanical centrifugal governor which is spring loaded and is connected to adjust the operation of the fuel injection pump based on the rate of rotation of a control shaft of the engine, the governor including an axially movable end support member for the spring, and a servomotor which is operatively connected to the end support member and to an auxiliary assembly such that it adjusts the operation of the auxiliary assembly based on the axial positioning of the end support member.Type: GrantFiled: June 12, 1981Date of Patent: October 18, 1983Inventor: Max Haubenhofer
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Patent number: 4409942Abstract: The invention relates to a fuel injection pump having a hydraulic governor, wherein the control pressure is reducible via a valve operating in accordance with temperature when the engine is cold, as a result of which the idling rpm increases.Type: GrantFiled: February 25, 1980Date of Patent: October 18, 1983Assignee: Robert Bosch GmbHInventor: Franz Eheim
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Patent number: 4408591Abstract: A servo valve is arranged within a timer piston for displacement in response to fuel pressure variable as a function of the engine rpm. When there occurs a change in the fuel pressure, the servo valve is automatically displaced relative to the timer piston to open a passageway for supplying the above fuel pressure to a hydraulic oil chamber defined at one end of the timer piston to cause displacement of the timer piston for control of injection timing. When there is no change in the fuel pressure, the servo valve is positioned to close the passageway to hold the timer piston stationary. Further, means may be provided for adjusting the setting load of a servo spring urging the valve body of the servo valve against the above fuel pressure.Type: GrantFiled: November 9, 1981Date of Patent: October 11, 1983Assignee: Diesel Kiki Co., Ltd.Inventor: Hisashi Nakamura
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Patent number: 4408590Abstract: A fuel injection pump for internal combustion engine, of the type comprising a body, a rotary distributor mounted in the body, driven in timed relationship with the associated engine, at least one pumping member carried by the rotary distributor, an angularly movable ring surrounding the rotary distributor, means provided on the ring to move the pumping member thereby to effect injection of fuel as the rotary distributor rotates, a piston coupled to the ring and slidably mounted with respect to the body, which piston is subjected to a fluid pressure which varies with the speed of the engine, and a spring bearing on the body and arranged to oppose the movement of the piston under the action of said pressure, wherein there is a cup-shaped member interposed between the spring and the piston, a rod comprising a retaining surface for defining the end position of the cup, the rod being slidable with respect to the body, and an actuating member for defining the axial position of the rod.Type: GrantFiled: February 20, 1980Date of Patent: October 11, 1983Assignee: CAV RotodieselInventor: Jean-Claude Bonin
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Patent number: 4407250Abstract: The invention relates to a fuel injection system having a pump/nozzle for which the fuel is metered by one apparatus and the injection onset is determined by a second apparatus. In accordance with the invention, these apparatuses each operate with a distributor, both distributors being combined into a single structural unit. Because of this combination, structural possibilities are created which, both functionally and in terms of manufacturing cost, represent substantial improvements in the field of injection systems.Type: GrantFiled: January 15, 1981Date of Patent: October 4, 1983Assignee: Robert Bosch GmbHInventors: Franz Eheim, Gerald Hofer, Heins Links
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Patent number: 4406268Abstract: A fuel injection pump in which the beginning of the fuel injection is set to "early" during the warming-up of the engine by means of an adjustable piston. The adjustment occurs by shifting the adjustable piston by a control member acting through an adjusting member.Type: GrantFiled: September 10, 1981Date of Patent: September 27, 1983Assignee: Robert Bosch GmbHInventors: Franz Eheim, Karl Konrath, Manfred Schwarz, Otmar Weiss
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Patent number: 4401088Abstract: The invention concerns a hydraulic automatic device for the injection advance of a diesel engine. The device comprises a hub fixed to the pump camshaft and a casing fixed to the drive pinion of the pump. Two rollers in the casing bear on the ramps of pistons of which the position is a function of the speed of rotation, owing to two inertia blocks, the thrust of the pistons and the control of the slide valve of a hydraulic distributor. Thus, at each speed of rotation, there corresponds a certain angular displacement of the components and a certain advance of the injections.Type: GrantFiled: December 28, 1979Date of Patent: August 30, 1983Assignee: Renault Vehicules IndustrielsInventor: Rene Morin
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Patent number: 4399793Abstract: A fuel injector for use on an internal combustion engine which includes a housing enclosing a cylindrical barrel having a bore formed therein. The barrel cooperates with the housing to form an annular cavity therebetween. Axially movable within the bore is a plunger and a piston which are spaced apart. The housing also has a nozzle situated at one end which communicates with the bore for releasing fuel into the combustion chamber of the engine. Formed within the bore between the plunger and the piston is a timing chamber and formed between the piston and the nozzle is a metering chamber. Pressurized fluid is directed into the timing chamber, into the metering chamber and into one end of the annular cavity by passages which are arranged in the housing and in the barrel. The passage leading into the end of the annular cavity has a control valve positioned across it such that fluid pressure can be varied to that end of the annular cavity.Type: GrantFiled: March 25, 1982Date of Patent: August 23, 1983Assignee: Deere & CompanyInventors: Bernard B. Poore, Charles W. May
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Patent number: 4397284Abstract: A distribution type fuel injection pump for use in a fuel injection combustion engine comprising a plunger capable of moving reciprocally along its axis and simultaneously rotating about its axis and a couple of members forming a cam mechanism having a first cam member and a second cam member. The first cam member is mounted on the plunger and the second cam member is mounted on a housing rotatably about its axis. The couple of cam members cause the plunger to reciprocally move while the plunger is rotating. The angular position of the second cam member about its axis can be controlled by a fuel injection timing control means in accordance with the engine speed. The second cam member can also turn about its axis so as to be adjusted in its angular position by a fuel injection timing adjustment when a selected operating condition of the engine, for example the engine start, is carried out.Type: GrantFiled: December 31, 1981Date of Patent: August 9, 1983Assignee: Diesel Kiki Co., Ltd.Inventors: Nobuhiro Kaibara, Masayoshi Kobayashi
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Patent number: 4397285Abstract: A method and apparatus for achieving optimized efficiency combustion in a diesel internal combustion engine utilizes a cylinder pressure detector which measures peak cylinder pressure relative to crankshaft timing and compares it with a speed-load-timing map comprising several engine parameters including engine speed and engine load in order to compensate for various unknown combustion characteristics of the fuels to be used in compression ignition engines, and automatically adjusts fuel injection timing for optimum efficiency.Type: GrantFiled: July 15, 1981Date of Patent: August 9, 1983Assignee: Physics International CompanyInventor: Cormac G. O'Neill
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Patent number: 4395990Abstract: A fuel injection pump for Diesel engines in which a rotating and reciprocating piston pressurizes and distributes fuel to individual pressure lines leading to the injection valves of the engine. In order to change the timing of injection with respect to the engine cycle, there is provided a mechanism to change the relative angle between the pressurizing piston and its drive means, which runs in synchronism with the engine. The mechanism operates hydraulically and is affected by the fuel pressure in the sump of the injection pump. There is also provided a hydraulic control valve mechanism which permits varying amounts of fuel to flow back from the sump to the low pressure side of the fuel delivery pump, thereby changing the injection timing. A primary control valve adjusts the sump pressure on the basis of engine speed while a secondary control valve adjusts the sump pressure on the basis of engine temperature in order to adapt the timing of fuel injection to engine starting and engine warm-up.Type: GrantFiled: May 4, 1981Date of Patent: August 2, 1983Assignee: Robert Bosch GmbHInventors: Gerald Hofer, Karl Konrath, Franz Eheim, Otmar Weiss, Edgar Schmitt, Werner Faupel, Edgar Gotz
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Patent number: 4393847Abstract: A low pressure sealing arrangement for a fuel injector which includes a housing containing a cylindrical barrel having a bore formed therein. Within the bore is positioned an axially movable plunger and piston which form a timing chamber therebetween. An inner surface of the housing cooperates with an outer surface of the barrel to form an annular cavity and a passage connects one end of the annular cavity with the timing chamber. Located within the annular cavity itself is arranged a pressure activated valve which is surrounded by a cylindrical sleeve. The pressure activated valve is spring biased to a closed position and is movable between an open and a closed position to regulate the flow of fluid into the timing chamber. The outer surface of the pressure activated valve cooperates with the inner surface of a cylindrical sleeve to form a first low pressure seal therewith when the valve is in the closed position.Type: GrantFiled: March 25, 1982Date of Patent: July 19, 1983Assignee: Deere & CompanyInventor: Charles W. May
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Patent number: 4393846Abstract: A fuel pumping apparatus includes an injection pump to which fuel is supplied through an adjustable throttle and which includes a fluid pressure operable device for controlling the timing of delivery of fuel. In order to accurately control the timing in accordance with the speed and the amount of fuel supplied to the engine a transducer is provided to sense the throttle position and a further transducer to measure the pressure upstream of the throttle. The signals from these transducers together with an engine speed signal are supplied to a circuit which computes or on the basis of stored information, provides a fuel quantity signal. The fuel quantity signal is supplied to a further circuit together with a speed signal which produces a desired timing signal. This signal is utilized to control the pressure applied to the device.Type: GrantFiled: January 30, 1981Date of Patent: July 19, 1983Assignee: Lucas Industries LimitedInventors: Dorian F. Mowbray, Ivor Fenne, Eric J. Cavanagh
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Patent number: 4389998Abstract: A distribution type fuel injection pump for use in a fuel injection combustion engine comprising a plunger capable of moving reciprocally along its axis and simultaneously rotating about its axis and a couple of members forming a cam mechanism having a first cam member and a second cam member. The first cam member is mounted on the plunger and the second cam member is mounted on a housing rotatably about its axis. The couple of cam members cause the plunger to move reciprocally while the plunger is rotating. The angular position of the second cam member about its axis can be controlled by a fuel injection timing control means in accordance with the engine speed. The second cam member can also turn about its axis so as to be adjusted in its angular position by a fuel injection timing adjusting means when the engine is substantially operated at the low speed, for example, at the time of engine start.Type: GrantFiled: October 22, 1980Date of Patent: June 28, 1983Assignee: Diesel Kiki Co., Ltd.Inventors: Hachiro Aoki, Hitoshi Tomita, Kiyoshi Nagamata
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Patent number: 4387688Abstract: A fuel injection pump is proposed wherein the idling rpm is influenced with the injection time adjustment via a linkage. The increased starting quantity can also be controlled along with this via an additional apparatus. The adjustment can be made in particular in accordance with engine temperature via a thermostatic servomotor.Type: GrantFiled: August 18, 1982Date of Patent: June 14, 1983Assignee: Robert Bosch GmbHInventor: Franz Eheim
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Patent number: 4387683Abstract: The invention relates to a fuel injection pump with a hydraulic governor and a hydraulic means of governing the onset of injection. The pressure controlled per se in proportion to the rpm is governed in accordance with load in slightly less than proportional fashion. The load-dependent control takes place by means of the adjusting piston of the hydraulic governor, which controls the cross section of a relief channel.Type: GrantFiled: February 22, 1980Date of Patent: June 14, 1983Assignee: Robert Bosch GmbHInventor: Franz Eheim
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Patent number: 4384562Abstract: A liquid fuel injection pumping apparatus includes a fluid pressure operable piston coupled to a timing component of the apparatus. A first spring is provided to bias the piston towards a retard position. A pair of abutments are provided at the ends of the first spring and adjusting means is provided to determine the spacing of the abutments. The adjusting means is controlled by a first control means the setting of which is varied with temperature. A second spring acts on the piston and is located between one of the abutments and the piston and second control means adjusted in accordance with the setting of the fuel control of the apparatus, is provided to determine the axial setting of the adjusting means.Type: GrantFiled: October 17, 1980Date of Patent: May 24, 1983Assignee: Lucas Industries LimitedInventor: Michael T. Hammock
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Patent number: 4378002Abstract: A fuel injection pump having elements for adjustment of the injection adjusting piston over a predetermined rpm range, advancing the adjustment toward "early" during cold starting and not further advanced with increasing rpm.Type: GrantFiled: July 11, 1980Date of Patent: March 29, 1983Assignee: Robert Bosch GmbHInventors: Karl Konrath, Helmut Laufer
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Patent number: 4373492Abstract: A fuel injection pump having a hydraulic injection onset adjustment apparatus is proposed, in which a supplementary variation of the injection onset is obtained by means of the variation in pressure deviating from proportionality. This variation is obtained by means of varying a relief channel of a work chamber of the injection adjusting system. The cross-sectional variation is effected in accordance with the hydraulic pressure of the supply pump as well as an adjusting member which varies the initial stress of the restoring spring of the control valve.Type: GrantFiled: July 30, 1980Date of Patent: February 15, 1983Assignee: Robert Bosch GmbHInventors: Karl Konrath, Helmut Laufer
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Patent number: 4368709Abstract: A distributor type fuel injection pump is disclosed for use with a diesel engine for successively supplying pressurized fuel to engine injectors in synchronism with engine rotation. The fuel injection pump includes an angularly movable control member adapted to determine the timing of fuel injection in accordance with its angular position. An injection timing control device is provided which comprises a casing, a piston drivingly connected to the control member and located for reciprocation within the casing to form two chambers at the respective ends thereof. The piston if formed therein with pressure passages communicating a pressure source with the pressure chambers, respectively. Control circuit means is provided which calculates an optimum injection timing value from various engine operating parameters and provides a control signal indicative of the calculated injection timing value.Type: GrantFiled: March 30, 1981Date of Patent: January 18, 1983Assignee: Nissan Motor Company, LimitedInventor: Seishi Yasuhara
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Patent number: 4366795Abstract: A fuel injection pump having a hydraulic injection onset adjustment apparatus is proposed in which a supplementary variation of the injection onset is obtained by means of the variation of the pressure deviating from proportionality. The pressure control valve used has a throttle connection between the pressure chamber and the spring chamber. The variation of the pressure is obtained by means of controlling the discharge channel of the spring chamber, by means of a control slide exposed to the pump pressure, whose restoring spring is variable in accordance with engine characteristics.Type: GrantFiled: July 30, 1980Date of Patent: January 4, 1983Assignee: Robert Bosch GmbHInventor: Helmut Laufer
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Patent number: 4366796Abstract: A distribution type fuel injection pump for use in a fuel injection combustion engine comprising a plunger capable of moving reciprocally along its axis and simultaneously rotating about its axis and a couple of members forming a cam mechanism having a first cam member and a second cam member. The first cam member is mounted on the plunger and the second cam member is mounted on a housing rotatably about its axis. The couple of cam members cause the plunger to reciprocally move while the plunger is rotating. The angular position of the second cam member about its axis can be controlled by a fuel injection timing control means in accordance with the engine speed. The second cam member can also turn about its axis so as to be adjusted in its angular position by a fuel injection timing adjustment when a selected operating condition of the engine, for example the engine start, is carried out.Type: GrantFiled: December 31, 1980Date of Patent: January 4, 1983Assignee: Diesel Kiki Co., Ltd.Inventors: Nobuhiro Kaibara, Masayoshi Kobayashi
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Patent number: 4365605Abstract: A method and apparatus for improving the acceleration behavior of a self-igniting internal combustion engine driven with an exhaust turbocharger by displacing the onset of injection during the acceleration phase toward "early", and a combustion chamber pressure is attained, which at least in part compensates for reduction in engine power caused by sluggishness of the turbocharger and a resultant smaller cylinder charge. Further increase in power is attained by means of an increase in the fuel component made possible by the adjustment of injection onset without exceeding the smoke limit of combustion. Apparatus are furthermore proposed for performing the method according to the invention, in which with the aid of an acceleration signal obtained by hydraulic or electric elements an adjustment toward "early" is effected in a hydraulically functioning injection adjustment device.Type: GrantFiled: October 27, 1980Date of Patent: December 28, 1982Assignee: Robert Bosch GmbHInventors: Wolf Wessel, Wilfried Sautter, Johannes Brettschneider