Patents Examined by David D. Reynolds
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Patent number: 4138971Abstract: Twin cylinder two cycle engine including a pair of stepped cylinders and a pair of stepped pistons slidable in said cylinders defining annular spaces of variable volume in said cylinders. The pistons are interconnected each other with 180.degree. phase difference. Air-fuel mixture introduced into the annular space in one cylinder is forced into the crankchamber of the other cylinder during the upward stroke of the associated piston, so that an additional charge is provided.Type: GrantFiled: October 27, 1976Date of Patent: February 13, 1979Assignee: Kawasaki Jukogyo Kabushiki KaishaInventors: Tetsuzo Fujikawa, Toshiyuki Takada
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Patent number: 4138978Abstract: This application discloses a two-open-position choke valve control system comprising:A housing;A first diaphragm which is linked with a choke valve shaft;A second diaphragm;A prop rod arranged between said first and second diaphragms, the length of the rod being shorter than the distance between said first and second diaphragms during their release conditions;A stopper means which prevents said second diaphragm from moving toward said first diaphragm;A first chamber formed between said first and second diaphragms and communicating with an intake pipe at the downstream of a carburetor throttle valve, and;A second chamber formed outside of said second diaphragm and communicating with said intake pipe through a device for detecting the driving conditions of a vehicle.Type: GrantFiled: October 22, 1976Date of Patent: February 13, 1979Assignee: Toyota Jidosha Kogyo Kabushiki KaishaInventors: Toshio Morikawa, Keiichi Okabayashi
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Patent number: 4137885Abstract: A glow plug temperature simulator circuit produces an electrical signal having a rate of increase of potential level substantially corresponding to the rate of increase of glow plug temperature and a rate of decrease of potential level substantially corresponding to the rate of decrease of glow plug temperature upon glow plug energization and subsequent deenergization, respectively. An electrical switching arrangement is effective to complete a glow plug energizing circuit across an operating potential source in response to the application of operating potential and, thereafter, is effective to alternately interrupt and complete the glow plug energizing circuit in response to the increase of the electrical signal to a predetermined potential level and in response to the decrease of the electrical signal to another lower predetermined potential level, respectively, to cyclically complete and interrupt the glow plug energizing circuit.Type: GrantFiled: October 11, 1977Date of Patent: February 6, 1979Assignee: General Motors CorporationInventor: David L. Van Ostrom
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Patent number: 4137886Abstract: An air intake system for an internal combustion engine, particularly for a diesel engine containing a cylinder having a combustion chamber therein, is disclosed. The system comprises a spiral-shaped intake port formed in the cylinder head. The spiral-shaped intake port introduces intake air into the combustion chamber and compulsorily produces a swirling motion of the intake air while the air passes through the intake port. The system further comprises a baffle or baffles for attenuating the swirling motion of the intake air to an optimum level prior to the intake air being sucked into the combustion chamber.Type: GrantFiled: October 14, 1977Date of Patent: February 6, 1979Assignee: Nissan Diesel Motor Company, Ltd.Inventor: Iwao Hiramatsu
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Patent number: 4135479Abstract: A piston and cylinder for two-cycle engines wherein the fuel-air mixture is precompressed in the crankcase and flows to the combustion chamber through transfer passages formed in the cylinder wall and under the control of the piston movement. The piston skirt is formed with windows or openings adjacent the end faces of the piston pin, the latter being mounted in piston pin bosses carried by bearing brackets depending from the piston head and, when the piston is at its lower dead center, the windows or openings register with the inlet openings of the transfer passages so that the precompressed fuel-air mixture then flows through the interior of the piston, the openings in the piston skirt and the transfer passages and into the combustion chamber itself which contains a depression volume.Type: GrantFiled: December 16, 1976Date of Patent: January 23, 1979Assignee: Karl Schmidt GmbHInventors: Johannes Reitz, Erich Stark, Dieter Schneck
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Patent number: 4135481Abstract: A low pollution internal combustion engine is disclosed in which a predetermined portion of a stratified charge is initially pre-formed in the part of the manifold which supplies the predetermined charge portion to the cylinder, said predetermined charge portion being composed of fuel-air mixture diluted by exhaust gas and pre-formed when the intake valve for the cylinder is in the closed condition, and subsequently being introduced together with the remaining portion of the stratified charge, when the intake valve is opened during the intake stroke of the engine.Type: GrantFiled: November 26, 1976Date of Patent: January 23, 1979Assignee: Cornell Research Foundation, Inc.Inventor: Edwin L. Resler, Jr.
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Patent number: 4134381Abstract: A reliable efficient rotary valve apparatus for internal combustion engines, configured for ease of installation and maintenance. Rotating valve apparatus controls transfer of intake and exhaust gases between intake and exhaust manifolds respectively of an internal combustion engine and the respective combustion cylinders thereof. Intake and exhaust portions of the rotary valve assembly are isolated by simple seal members. Activating means, responsive to rotation of the rotatable valve member, create positive fluid-flow transfer of gaseous currents through the rotating valve member. Spring biased, pressure equalizing plunger seal apparatus increases reliability and longevity of use of the rotary valve apparatus and maintains proper seals for fluid-flow passage between the rotating valve member and individual compression cylinders of the engine.Type: GrantFiled: August 30, 1977Date of Patent: January 16, 1979Inventor: Mark J. Little
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Patent number: 4133322Abstract: In an internal combustion engine, an injection hole is provided in the cylinder head to inject narrow streams of air towards the spark gap, particularly during idling and low load running conditions. The injected air is 5 to 30% by weight of the intake fuel-air mixture provided via the intake manifold and creates a swirl or turbulence thereby increasing combustibility. The hole is connected via a sub intake passage to the main air intake passage upstream of the venturi in the carburetor or between the venturi and throttle valve.Type: GrantFiled: July 19, 1976Date of Patent: January 9, 1979Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Hirokazu Nakamura, Tsuneo Ohinouye, Kenji Hori, Yuhiko Kiyota, Tatsuro Nakagami, Yutaka Tsukamoto, Katsuo Akishino
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Patent number: 4132211Abstract: A fuel injection system for continuous injection to an internal combustion engine has a pivoting air sensor plate with a correction lever that engages a fuel control plunger for metering out fuel in proportion to the air flow. The system also includes a bimetallic, temperature-dependent strip which exerts an opening force on the correction lever when the engine is cold. An electric heater is energized by the starter switch and begins to reduce the force due to the bimetallic strip even before the engine has actually warmed up. A second electric heater of reduced power maintains the strip in disengagement during normal engine operation.Type: GrantFiled: October 13, 1976Date of Patent: January 2, 1979Assignee: Robert Bosch GmbHInventors: Thomas Wilfert, Alfred Grassle, Klaus-Jurgen Peters
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Patent number: 4132210Abstract: A multi-channel, sequentially timed fuel injection system for an internal combustion spark ignited engine employs a solenoid actuated injector valve for each cylinder controlled by the outputs of separate variable width pulse generators. The pulse generators each employ a resistance-capacitance discharge timing circuit and a single thermistor, common to all the generators, sensitive to engine temperature is connected to the RC circuits of the generators in a first circuit configuration during starting of the engine which provides a wide range of fuel delivery rates for starting and in a second circuit configuration during normal operation in which the various RC circuits are isolated from one another so that interaction of the variable width pulse generators does not occur as a result of the common thermistor connection during normal engine operation.Type: GrantFiled: October 1, 1976Date of Patent: January 2, 1979Assignee: Allied Chemical CorporationInventor: E. David Long
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Patent number: 4131094Abstract: An internal combustion engine has a crankshaft offset to one side of the axis of the engine cylinder and an articulated connecting rod linkage operable to vary the stroke of the engine piston in accordance with engine operating conditions, so that different density fuel-air charges inducted into the cylinder will be compressed to substantially the same extent each time the cylinder is fired, regardless of throttle setting, engine speeds, or loads.Type: GrantFiled: February 7, 1977Date of Patent: December 26, 1978Inventor: George W. Crise
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Patent number: 4128085Abstract: An auxiliary intake passageway and an auxiliary intake valve operated for allowing an excessive air-fuel mixture to be drawn into a combustion chamber of an engine through the auxiliary intake passageway and for expelling the drawn excessive air-fuel mixture from the combustion chamber during low load operations of the engine and a bypass intake passageway and an auxiliary valve or a throttle valve operating device for increasing the flow of air passing through the intake passageway of the engine during the engine low load operations for ensuring the excessive air-fuel mixture drawn into the combustion chamber.Type: GrantFiled: May 16, 1977Date of Patent: December 5, 1978Assignee: Nissan Motor Company, LimitedInventor: Kazuya Kunii
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Patent number: 4127098Abstract: Disclosed is a starting device for an internal combustion engine having a stationary bearing axle attached to the engine, a pulley rotatably mounted on the axle and adapted for accepting a starting rope wrapped thereabout, a recessed coupling attached to the drive shaft of the engine, coaxially surrounding the rope pulley in its recess and having a plurality of inwardly facing ratchet teeth.Type: GrantFiled: March 21, 1977Date of Patent: November 28, 1978Assignee: Firma Andreas StihlInventors: Gerd Frers, Hans Nickel, Klaus Henning
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Patent number: 4127090Abstract: An idle speed control mounted on the body of a carburetor for controlling the idle speed of an internal combustion engine is disclosed. In a first condition, the throttle plate is maintained in a position to provide a "normal" idle speed and in a second condition a fixed engagement between the stop means and the throttle plate provides a fast "start-up" idle condition. In a preferred embodiment in the first condition, the throttle plate engages the stop means and the engagement is variably adjustable to vary the "normal" idle speed. The engagement of the throttle plate with stop means in the second condition is stable but may be released by movement of a throttle trigger.Type: GrantFiled: May 20, 1977Date of Patent: November 28, 1978Assignee: McCulloch CorporationInventor: Edward J. Pilatowicz
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Patent number: 4126109Abstract: A thermostatic valve mounted in an air cleaner has an inlet connected to an intake manifold of an engine and an outlet connected to a negative pressure chamber of a negative pressure motor for actuating a switching valve pivotally mounted in a throat of the air cleaner, by the opening of the switching valve warmed air around an exhaust manifold of the engine being introduced into the air cleaner for the purpose of ensuring a smooth starting and operation of the engine. The thermostatic valve, for controlling the introduction of the warmed air as well as an amount of additional air fed to the engine as a function of the temperature in the air cleaner, has inside thereof a first passageway communicating the inlet with the inside thereof, a second passageway communicating the outlet with the inside and a third passageway communicating the inside with the air cleaner.Type: GrantFiled: November 5, 1976Date of Patent: November 21, 1978Assignee: Nippon Denso Co., Ltd.Inventors: Hajime Akado, Akihide Yamaguchi, Yoshiro Uchida
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Patent number: 4124979Abstract: An internal combustion engine with exhaust gas turbocharger, according to which in the lower partial load range of the engine for purposes of increasing the temperature of the air charge exhaust gas from an exhaust gas conduit is through a connecting line admixed to the compressed air charge, and according to which in the full load range a portion of the compressed air charge is through a connecting line passed from an air charge pressure line into the exhaust gas conduit ahead of the exhaust gas turbine. Ahead of where the connecting line leads into the air charge pressure line, there is provided an air charge cooler which by means of a thermostatic control controls the charge air of the internal combustion engine to a predetermined temperature.Type: GrantFiled: November 29, 1976Date of Patent: November 14, 1978Assignee: Klockner-Humboldt-Deutz AktiengesellschaftInventors: Paul Tholen, Gerhard Finsterwalder
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Patent number: 4125105Abstract: An externally ignited four cycle internal combustion engine equipped with an inlet valve and an outlet valve, both valves being positioned on one side of the cylinder. A swirl (or vortex) chamber is provided within the cylinder head, the height of the swirl chamber being substantially less than its maximum diameter. The inlet and outlet valve discs lie substantially in a same plane. A channel-like recess in the cylinder head, which creates a guide channel when the piston is in its upper dead center position, terminates approximately tangentially in the swirl chamber.Type: GrantFiled: February 11, 1977Date of Patent: November 14, 1978Inventor: Michael G. May
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Patent number: 4124002Abstract: A connecting rod whose length varies according to given pressure changes in the cylinder of an associated internal combustion engine. The connecting rod lengthens in response to subatmospheric pressures acting on the piston during the fuel intake stroke, and shortens in response to superatmospheric pressures of a given magnitude acting on the piston.Type: GrantFiled: December 1, 1976Date of Patent: November 7, 1978Inventor: George W. Crise
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Patent number: 4122805Abstract: Combustion chamber arrangements for divided chamber (prechamber) type diesel engines characterized by relatively low emissions of HC, CO and NO.sub.x, relatively low noise and physical stress and good fuel economy and power output and having (1) canted valves in the heads and forming therewith lateral wedge-shaped valve recesses, (2) cooperating wedge recesses in the pistons forming disc or pancake-like valve pockets in conjunction with the cylinder head recesses and (3) in-head prechambers closed by flame cups having wide connecting passages in their floors and side outlets for connection through channels with the edges of the valve pockets.Type: GrantFiled: June 24, 1977Date of Patent: October 31, 1978Assignee: General Motors CorporationInventors: William L. Kingsbury, Kelly W. Thurston
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Patent number: 4122804Abstract: Combustion chamber arrangements for divided chamber (prechamber) type diesel engines characterized by relatively low emissions of HC, CO and NO.sub.x, relatively low noise and physical stress and good fuel economy and power output and having (1) canted valves in the heads and forming therewith lateral wedge-shaped valve recesses, (2) cooperating wedge recesses in the pistons forming disc or pancake-like valve pockets in conjunction with the cylinder head recesses and (3) in-head prechambers closed by flame cups having wide connecting passages in their floors and side outlets for connection through channels with the edges of the valve pockets.Type: GrantFiled: June 24, 1977Date of Patent: October 31, 1978Assignee: General Motors CorporationInventors: William L. Kingsbury, Kelly W. Thurston, Harry L. Chapman