Abstract: An automotive type engine is provided with an intake manifold having tuned runners all of the same length and each extended to a substantial length sufficient to tune the runner, and each of which are coiled unidirectionally approximately 270.degree.

Abstract: A multi-plunger fuel injection pump consisting of a number of reciprocable fuel pumping plungers to which is distributed fuel by a fuel distributor plunger, all of the plungers being actuated by a common camshaft, the number of distributor plungers being less than that of the pumping plungers and determined as a function of the operating range of the pump, the fuel flow to and from the individual pumping plungers being controlled by a solenoid operated spill control valve that is selectively operable to determine both the timing and duration of fuel injection.

Abstract: An internal combustion engine having a rocker arm shaft pivotally mounting a number of rocker arms mounts the arms in pairs, the rocker arms of each pair straddling a pedestal supporting the shaft and being resiliently biased axially towards one another and against the pedestal by a one piece wire spring clip that resiliently surrounds and engages the rocker shaft and axially bears against the rocker arms.

Abstract: An air-air/fuel throttle body is provided with a secondary throttle valve of a differing diameter and operating in a different cross-sectional area of the throttle body induction passage, the upstream throttle valve being positively connected to the vehicle accelerator pedal to assure a like opening or closing movement of the latter throttle valve upon movement of the accelerator pedal, the construction assuring that main control of the flow of air and changes in manifold vacuum will be retained by the lower smaller diameter servo operated throttle valve operating in a smaller cross-sectional area.

Abstract: An anti-jamming mechanism for a device providing linear rotary movements consisting of a simple one-piece collar having split end portions with one of the portions anchoring the collar to a rotatable and axially movable sleeve driven by a screw mechanism, the other end portion acting as a spring-like flexible finger reacting against a stepped stationary housing portion to stop rotation of the sleeve while permitting its axial movement upon continued rotation of the screw until the finger clears the end of the step, whereupon the sleeve is permitted to rotate freely with the screw without further axial movement.

Abstract: A vacuum-mechanical system for controlling emissions from a diesel engine by controlling exhaust gas recirculation (EGR) levels and modulating the fuel injection pump timing to coordinate the two; the system including a three-dimensional cam responsive to changes in engine speed and load and fuel delivery to vary the angular position of the EGR valve and simultaneously modulate the injection timing.

Abstract: A carburetor has a throttle member in the form of a laterally movable slide controlling the size of the induction passage. At planar edge areas of the guide surfaces, the slide is sealingly and slidably guided on a surface extending normal to the induction passage. The slide is unloaded from vertical downward pressures exerted on the guide surfaces by an unloading mechanism controlled by engine manifold vacuum. Such an unloading mechanism can consist of a parallelogram lever arrangement which through a pressure chamber actuates lifting rails arranged laterally to the guide surfaces. The slide is supported on the lifting rails by roller arrangements.

Abstract: In an apparatus for altering the valve timing of an internal combustion engine as a function of load and rotational speed, a helical pinion is mounted so as to be axially displaceably, but non-rotatably mounted on the camshaft. The pinion is in engagement with an axially fixed helical intermediate gear-wheel driven by the crankshaft. The helical pinion is connected to the camshaft by a splined connection and has tracks for a radial ball bearing, one of which is formed on a sleeve which is guided axially displaceably, but non-rotatably in a part of the camshaft housing by way of a key and keyway connection. The sleeve has a toothed rack portion which is in engagement with an actuating pinion which is driven by an actuating drive controled by a sensor sensing the operating parameters of the engine.

Abstract: An automotive type fuel tank-filler pipe connector consists of a one-piece flexible grommet having relatively rigid inserts embedded in the wall of the grommet and extending axially, the inserts comprising a number of flexible finger-like elements circumferentially separated but joined at one end by a chamfered nose portion, insertion of the grommet into a fuel tank opening being accomplished by the deformation of the nose portions being permitted by the radial inward collapsing of the fingers, passage of the nose portion past the tank opening returning the fingers outwardly; the insertion of the fill pipe camming the fingers further outwardly to clamp against the pipe, a further screw type hose clamp further clamping the grommet to the pipe.

Abstract: An internal combustion engine comprises a cylinder head (1), a camshaft (2) mounted thereon, a rocker cover (4) and a rotary vacuum pump (10) mounted on the cylinder head (1) within the rocker cover (4) and driven by the camshaft (2), providing compact packaging and low noise levels. The vacuum pump is lubricated from the camshaft via the pump exhaust port (30) discharging air into the rocker cover.

Abstract: A carburetor fuel bowl vent valve assembly consists of a one-piece plastic housing having a central partition with a central well defining a zigzag shaped path for the flow of fuel vapors from the carburetor fuel bowl to a carbon canister. The well contains a vacuum operated vent valve that is spring opened during engine-off operation to allow the storage of fuel vapors under engine hot soak conditions, and is closed by engine manifold vacuum during engine running operation so that the fuel vapors will be rerouted into the engine. The vent valve further includes thermally responsive means to close the vent valve during low ambient temperature conditions. It also includes seal locating means that retain the seal in position without stretching or deforming it.

Abstract: A diesel engine is provided with extenders or spacers attached to those portions of the cylinder block, cylinder head and piston that define the combustion chamber, the extenders being of substantial axial extent and of low thermal conductivity to insulate the components to which they are attached from the combustion chamber while redefining the combustion chamber surfaces.

Abstract: A method of operating an internal combustion engine of the spark ignition type with a fuel having a high latent heat of vaporization such as methanol by injecting the fuel in two stages, the first major portion of the fuel being injected at the start of the intake stroke into a bowl-in-piston cavity combustion chamber to be vaporized and atomized, the second smaller portion being injected late in the compression stroke just prior to ignition to remain close to the injector tip to richen the mixture adjacent the spark plug, and igniting the mixture.

Abstract: A container for fluids for various operating functions in a motor vehicle, the container being arranged in the engine compartment and being constructed as an essentially annular or U-shaped hollow body with an inner contour forming an air guide surface or shroud defining an air guide duct for the air cooling fan of the internal combustion engine and having an outer contour shaped to conform to the shape of the radiator associated therewith, the radiator being received within the outer contour within a holding means by way of resilient foam mountings.

Abstract: An air or air/fuel throttling body contains a main air or air/fuel induction passage with a main rotatable throttle plate movable across the passage to variably control the flow through it. Additionally, a shuttle type slide valve is mounted on the main throttle plate and provided with openings that are adapted to be aligned or misaligned at times with apertures in the main throttle plate to control the flow of an additional volume of air or air/fuel through the throttle valve into the engine regardless of the attitude or position of the main throttle plate and supplementing the flow normally passing around the throttle plate; the shuttle valve being moved by power means energized by an electrical signal from a microprocessor having inputs sensing operating conditions of the engine to position the slide valve to maintain an idle speed schedule.

Abstract: An automotive type carburetor is provided with an air bypass channel routing idle speed air flow around the closed throttle valve; the bypass channel containing a spring closed poppet valve having an adjustable volume internal channel connecting air to opposite sides of the valve at all times in a restrictive manner, the movement of the poppet valve and the volume of flow through the internal air flow channel being controlled by a solenoid operated plunger to progressively increase or decrease air flow from a minimum provided by the flow through the internal passage to a maximum provided by flow past the unseated poppet valve in addition to flow through the internal passage.

Abstract: A diesel type prechamber has a centrally located heated tubular member supplied internally with hot air through a secondary throat or transfer passage, the air vaporizing the fuel sprayed against the outer surface of the hot member and also mixing with the vaporized fuel upon passage of the air through transpiration holes in the member.

Abstract: A motor vehicle throttle valve positioner consisting of an elongated screw means moving the throttle valve and providing two ranges of movement, one being an engine idle speed mode of operation to maintain the engine at the correct idling speed level as determined by a microprocessor or similar electronic control, the other being a speed control mode of operation wherein a chosen engine off-idle speed level is maintained, and a failsafe operation returning the throttle valve to the idle speed range in the event of electrical failure or termination of the speed control mode of operation.

Abstract: An EGR assembly of a sonic flow EGR valve and a fluid pressure actuated servo operated by air pressure modified by an air bleed device controlled in response to changes in carburetor venturi vacuum levels to provide EGR valve openings in proportion to engine air flow increases.

Abstract: An engine carburetor automatic choke includes a heater to warm the choke bimetallic coiled spring to effect choke come-off faster than by the normal warm-up of the spring in response to ambient temperature rise, the heater being activated upon operation of a bimetallic switch upon the attainment of a predetermined temperature level, the switch also controlling energization of an electrical control to control the operation of a gas conversion device such as a catalytic converter.