Abstract: Several embodiments of internal combustion engines offering improved performance in the form of improved fuel economy and reduction in the emission of unwanted exhaust gas constituents at idle and low speed operation. In each embodiment, an induction system is employed using a main intake passage and a sub-intake passage, each of which communicates with the combustion chamber through a respective port. The sub-intake passage has a substantially smaller cross-sectional area than the main intake passage so that a given mass flow through this passage will enter the combustion chamber at a higher velocity than that flowing through the main intake passage. Throttle valve means are provided for sequentially controlling the flow into the combustion chamber through the main and sub-intake passages.

Abstract: 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.

Abstract: A fuel injection pump, embodied as a series pump, has a governor rod for rotating a pump piston provided with an oblique control groove. The pump piston further has at least one longitudinal groove, by means of which upon congruence with a fill and relief opening of the pump work chamber, a zero fuel supply can be established. With electrically controlled actuation of the governor rod, the appropriate adjustment of the end stops of the governor rod or the appropriate embodiment of the pump piston assures that the opening comes into congruence with a longitudinal groove adjoining the full-load working zone of the pump piston before the end stop of the governor rod is reached.

Abstract: In an evaporative emission control system of a motor vehicle, a two way valve is provided for connecting the canister with the air-fuel mixture intake tube of the engine when assuming a first position and connecting the canister with the clean side of the air cleaner when assuming a second position. The two way valve assumes the first position when the interior condition of the fuel tank does not tend to saturate the vapor adsorbing power of the canister, and assumes the second position when the interior condition of the fuel tank tends to saturate the vapor adsorbing power of the canister.

Abstract: A fuel injection pumping apparatus for supplying fuel to an internal combustion engine, includes an injection pump having a plunger movable inwardly by cam means to effect delivery of fuel and a valve operable to control the supply of fuel to the bore containing the plunger. The valve is electrically controlled and the apparatus includes an electronic control system which is supplied with signals from transducers which are responsive to the positions of the cam means and a rotary part of the apparatus relative to the housing of the apparatus. The control system has information stored therein regarding the profile of the cam means, and controls the operation of the valve so that the correct amount of fuel is supplied to the bore.

Abstract: The invention relates to an rpm governor of a fuel injection pump for internal combustion engines, in which a positive or negative adaptation is attainable by way of a hydraulically actuated piston. The fluid pressure determining the piston position is variable by means of a valve in an outflow conduit from the control pressure chamber.

Abstract: A fuel injection pump, the volume adjustment member of which has a limiter of its play in the form of an adjustable device, which is movable in accordance with the displacement of a control piston in response to a contour provided in the control piston. The displacement of the first control piston occurs in accordance with the pressure of the air supplied to the combustion chambers of the internal combustion engine, and this in turn is controlled with the aid of a pressure element. The pressure element actuates a control piston, with the aid of which a control pressure is created which actuates the first control piston. The control pressure, at the same time, acts on the pressure element by way of the second control piston in the form of return pressure. In a state of equilibrium the control pressure circuit is separated from the pressure source.

Abstract: The vane-cell pump of a fuel injection pump for internal combustion engines has one or more adjustable throttle restrictions disposed on the intake side and/or on the compression side.By adjusting the particular throttle restriction, the slope of the characteristic curve of the course of the supply pump pressure can be influenced. In this way, it is possible to effect an increase in the slope over the entire rpm range, an increase only in the upper rpm range, or a lesser increase in slope only in the upper rpm range. The invention contemplates several embodiments which essentially cover location of the throttle restriction in the fuel injection pump.

Abstract: A regulating device for the supply quantity of an injection pump for internal combustion engines having an electromagnet system as a component of a fuel quantity final control element is proposed. The fuel quantity final control element effects the controlling position of a control member, which fixes the supply onset or end by the injection pump through the closing or opening, respectively, of a relief conduit of the pump work chamber. The fuel quantity final control element includes a linear magnet, which is operationally connected with the control member. In order to transmit the stroke movement or displacement of the armature of the linear magnet onto the control member, a transmission member is provided which includes a rotatably supported adjusting shaft, a crank and an eccentric. The crank and the eccentric are disposed on opposite ends of the adjusting shaft and protrude in opposite directions from one another.

Abstract: There is proposed a control apparatus (FIG. 1), which in order to prevent the emission of smoke upon acceleration of the engine, controls a damping stroke (h.sub.D) preceding the adjusting stroke (h.sub.L) which is controlled in accordance with charge pressure. The apparatus has a pressure chamber defined by a movable wall and connected via charge air line to the air inlet tube of the engine, and the movable wall actuates an adjusting member which varies the adjusting range or the full-load position of a supply quantity adjusting member of a fuel injection pump. A throttle device embodied as a sequence valve is inserted into a line connecting portion connecting the charge air line with the pressure chamber, and the stroke/time characteristic of the throttle device determines the damping stroke (h.sub.D). The apparatus may be mounted either on the rpm governor or on the injection pump of Diesel motor vehicle engines.

Abstract: An electronically controlled device for premetered pressure-time injection using high injection pressure and low feed pressure, which include one source (5-6) of medium pressure (MP) which is intermediate the high and low pressures, a two-stage rotary distributor which cyclically distributes the high and low pressure into single piping systems for each cylinder, a plurality of injection nozzles wherein, in each injector nozzle (30), a metering piston is provided (8) whose delivery chamber (21) is connected to the single piping system, and an injector control piston (11) having a control chamber (31) which is connected, via a three-channel electrovalve (9), through a medium pressure channel for the purposes of initiating injection, and through a second channel to the injection chamber (22) for purposes of initiating metering.

Abstract: An rpm governor of a fuel injection pump for internal combustion engines is proposed. The rpm governor includes a governor spring, which at one end engages a governor lever of the fuel injection pump and at the other end engages a correction lever. The other end of the correction lever is engaged by a correction spring, which is coupled at its other end with an adjusting member secured eccentrically relative to an adjusting shaft on an adjusting lever. The adjusting lever is connected with the adjusting shaft and is variable in its position by means of this shaft. The correction lever is supported between a roller and an adjusting gear wheel, which engages a rack zone of the correction lever. By rotating the adjusting gear wheel, the lever arms associated with the governor spring and the correction spring can be varied, thus varying the resultant spring force or spring constant engaging the governor lever in order to establish the degree of proportionality of the rpm governor.

Abstract: A fuel injection pumping apparatus of the rotary distributor type has a distributor member which is also axially movable to determine the allowed outward movement of the pumping plungers and hence the amount of fuel supplied to the associated engine. The extent of outward movement is determined by inclined stop surfaces which co-operate with complementary surfaces on shoes associated with the plungers. In order to minimize axial movement of the distributor member when the shoes engage the stop surfaces a chamber to which liquid is supplied to vary the axial setting of the distributor member, is locked off from fluid supply and drain passages, by a servo valve 41 when the correct position of the distributor member is obtained. A hydraulic lock is thus created in the chamber.

Abstract: A fuel injection pump for a diesel engine has a plunger pump. The plunger pump draws fuel from a fuel tank through a fuel passage to the engine. A safety device limits the flow rate of fuel supplied through the fuel passage to the plunger pump, and thus the engine, when the device is operated.

Abstract: A fuel flow regulator for an internal combustion engine having an exhaust gas turbocharger is disclosed. The fuel flow regulator responds to intake manifold pressure. Thus the fuel flow regulator increases the maximum fuel flow to the internal combustion engine from a first maximum predetermined fuel flow rate when the intake manifold pressure is at a first predetermined intake air pressure level to a second predetermined maximum fuel flow rate when the intake air manifold pressure is at a second predetermined intake air pressure level. Additionally, the fuel flow regulator decreases fuel flow to a third maximum fuel flow rate which is less than the first predetermined maximum fuel flow rate when the intake manifold pressure is greater than the second predetermined intake air pressure level. Therefore, the fuel flow regulator protects the internal combustion engine from overboost of the engine by the turbocharger and for overfueling the engine.

Abstract: A fuel supply apparatus for internal combustion engines is proposed, which has a fuel injection pump for supplying a regulatable fuel injection quantity, a ventilation apparatus for the fuel injection pump, a fuel quantity meter and a means of exhaust gas recirculation controlled by fuel quantity. A ventilation valve responding to a predetermined pump interior pressure is included in an overflow line in order to cool the fuel injection pump by connection with the fuel supply container. The fuel quantity meter is embodied as a spring-loaded piston-type fuel quantity meter and has a travel receptor which generates an electrical output signal and delivers it to a control member of the exhaust gas recirculation system for varying the recirculated exhaust gas quantity accordingly.

Abstract: 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.

Abstract: In a control equipment for adjusting the moment of fuel injection and/or the amount of fuel supplied by a fuel injection pump in internal combustion engines, at least one mechanical energy accumulator (9, 10) is provided between an adjusting member (2, 3) for the begin of fuel supply and/or for the amount of fuel supplied and an electrical servomotor (4), said energy accumulator comprising two mutually movable spring collars (12, 13) between which is accommodated a pre-stressed compression spring (11) and the maximum distance of which one from the other is limited by abutments (14, 15) of a housing surrounding the spring collars. (FIG. 1).

Abstract: An electric actuator responds to a command for control of fuel injection rate. A position sensor including a multiturn spiral resistor senses the position of the actuator as a varying resistance to produce a corresponding position signal for feedback control purposes. The rate of change in the resistance of a potentiometer corresponding to the fuel injection rate in the range of zero to the rate required under full load differs from that in the range of the rate required under full load to the rate required during starting of the pump. The potentiometer includes first and second series connected resistors with different resistances per unit length. The resistance of the first resistor may be nullified during starting of the engine.

Abstract: A fuel injection pump device for an internal combustion engine, in which a mechanical correcting signal continuously generated from a bellows in response to change in atmospheric pressure is transmitted to an adjusting member associated with a pump to adjust an amount of fuel injected into the engine by the pump. Transmission of the mechanical correcting signal from the bellows is limited such that the mechanical correcting signal is allowed to be transmitted to the adjusting member in a range in which the atmospheric pressure is below a predetermined level, but is prevented from being transmitted to the adjusting member when the atmospheric pressure is above the predetermined level.