Abstract: The disclosure illustrates a fuel mileage indicator which gives a dynamic reading of the fuel mileage for a vehicle powered by an internal combustion engine. As a result it indicates to the driver whether he is driving efficiently and is conserving fuel. The device consists of a variable resistance device responsive to a fuel system parameter or other engine parameter which is proportional to engine fuel flow. This variable resistance device is connected in series with a generator having a D.C. voltage output directly proportional to vehicle speed. An ammeter indicates current through the circuit and is calibrated to give an output of miles per gallon.

Abstract: The disclosure illustrates a gate type valve which is actuated to block off the exhaust system of an internal combustion engine thereby creating a back pressure which retards rotation of the engine. The gate valve has a series of ports which are selectively uncovered by appropriate inputs to the valve actuator to minimize force requirements when the valve is opened and to limit the amount of engine valve float at relatively high R.P.M.

Abstract: The disclosure illustrates an anti-tampering fuel control valve for a fuel system providing fuel at a regulated pressure to a series of unit injectors on a diesel engine. The injectors are cam actuated to inject fuel quantities related to the pressure of the fuel supplied to them. The control valve bypasses fuel from the output of the fuel system to a low pressure region when the pressure exceeds a first given level because of fuel system tampering. Orifices in the bypass flow path cause the fuel pressure to follow a schedule generally similar to the normal system pressure schedule but at lower levels. Bypass flow is continued until the fuel system pressure drops to a lower pressure than the pressure at which bypass flow begins.

Abstract: A dual cooling system for an engine is provided which embodies two independent circuits for a liquid coolant. The temperature of the coolant in one circuit is different than that of the coolant in the other circuit. A pump impeller means is provided for each circuit and both impeller means are actuated by a common drive means. Limited coolant migration between the circuits is effected during actuation of the impeller means. A coolant make-up means is connected to each circuit at the inlet side of the pump impeller means.

Abstract: This disclosure deals with a variable fluid pressure regulator wherein the level at which the fluid pressure is regulated is adjustable. A member has a flow passage formed therein, and the fluid flows through the passage and out of the member, and a closure is positioned over the opening. The closure is yieldably mounted relative to the member and a spring urges the closure toward the opening. A recess or cavity is formed in the closure, and the fluid flows from the opening, into the recess, and then through a space between the closure and the member. The fluid pressure in the passage is a function of the spring force and the effective area of fluid pressure on the closure, and the effective area comprises the area of the opening plus any area of the recess which lies outside the margin of the opening. The regulated fluid pressure level may be varied by laterally shifting the closure relative to the opening in order to change the effective area.

Abstract: The disclosure illustrates an isolated rocker arm cover for an internal combustion engine. An elongated continuous elastomeric seal element extends from a groove around the periphery of the rocker arm cover. Spring loaded fastener assemblies resiliently hold the cover against the engine with a sufficient force to provide an effective oil seal but still maintain the cover isolated from the engine. The seal element has a configuration assuring a narrow contact area between the ring and the engine.

Abstract: This disclosure deals with a centripetal flow turbine housing including an intake opening for receiving a working fluid, a volute which conveys the fluid to a turbine wheel rotatably mounted within the housing, and an outlet opening co-axial with the wheel. A valve is provided adjacent the intake opening, and two intake passages are formed in the housing between the valve and the volute. One of the intake passages is arranged concentrically around the other intake passage, and the intake passages merge ahead of the volute to form generally concentric aspirating nozzles. The valve is adjustable to one position where it directs all of the working fluid through one intake passage, and to a second position where it directs the working fluid through both intake passages.

Abstract: The disclosure illustrates an air breathing liquid cooled compression ignition engine having a turbocharger and an aftercooler connected to the engine cooling system to lower the temperature of air compressed by the turbocharger. The engine cooling system includes a centrifugal pump having a pressure output that increases with increasing engine RPM. In order to minimize the generation of smoke during transient acceleration from idle, a flow control valve responsive to pressure differentials permits engine coolant flow through the aftercooler only when the engine is in its normal operating range above idle. The valve prevents the aftercooler from heating the intake air when the air delivered to the aftercooler during idle is lower than the temperature of the engine coolant.

Abstract: A bearing structure is provided for use in machinery wherein certain components thereof operate at high rotational speeds. The structure includes a shaft mounted for rotation within a stationary housing member. A pair of bearings, arranged in longitudinally spaced relation, is disposed between the shaft and the adjacent surface of the housing member. The housing member is provided with a passage for high pressure oil terminating at each bearing. Each bearing is of sleeve-like configuration and is provided with a plurality of radial holes which are in communication with the oil passage of the housing member. A plurality of longitudinal openings are formed in each bearing and interconnect the end faces of a bearing. The openings communicate with the holes of the bearing thereby permitting oil to flow to the end faces.

Abstract: The disclosure illustrates a heat distribution passage for the intake manifold of an internal combustion engine having a burner type manifold air preheater. The preheater is positioned in an elongated intake manifold having spaced inlet ports which carry intake air to the cylinders of the engine. The preheater is adjacent some, but not all, of the inlet ports. The distribution passage extends from a point adjacent the preheater to an outlet at a remote engine intake port opening. When an engine intake valve is opened to pass air into a cylinder, the intake port has a momentary reduction in pressure. This reduction causes heated air to pass from the preheater through the passage and into the intake port where it is mixed with the nonheated intake air. Proper sizing of the tube in relation to the port area assures even distribution of heat between all of the intake ports.

Abstract: The disclosure illustrates a valve spring compressor tool which may be used to remove heavy duty double valve springs from an engine with no more disassembly of the engine than removal of the rocker cover. The tool comprises a support bridge bolted to the rocker housing across the valves to be compressed. A plate having two cup-like recesses fits over the valve springs and a central sleeve passes through the plate to guide it for movement parallel to the normal direction of compression for the springs. A shaft is threaded into the cross arm and is aligned with the sleeve so that rotation causes it to exert a compressive force of great magnitude and retains the valve in the compressed position.

Abstract: A metering and control system is described for supplying fuel to a burner nozzle of a burner assembly which preheats intake air in a diesel engine. Fuel for the control system is derived from the regulated pressure output of a fuel pump in the engine fuel supply system. The fuel metering and control system includes a series of parallel flow lines connected between the fuel pump and the burner nozzle. Each line has a metering orifice and check valve set to pass flow above a given pressure level. For intermediate rpm flow is through one line and at high rpm flow is through both. As a result, the fuel flow rate into the burner nozzle is directly proportional to engine rpm to provide a uniform nozzle preheat temperature over the full range of engine rpm. Suitable control inputs are provided to initiate or terminate flow to the burner in response to selected engine operating parameters.

Abstract: A fuel injection system for a diesel engine. An injection rate control device, such as an auxiliary spring, is connected in line with the conventional injection train which operates the injector plunger in synchronism with the rotation of the camshaft. When an auxiliary spring is used as the injection rate control device, the auxiliary spring has a lower spring rate than that of the injection train so that the injector plunger is advanced at a different rate when it is under the control of the auxiliary spring. Means are included for rendering the auxiliary spring ineffective during a portion of the plunger advancement so that the rate of plunger advancement is controlled by the auxiliary spring during the initial part of the advancing stroke, and by the conventional part of the injection train during the balance of the advancing stroke. The auxiliary spring automatically varies ignition timing and injection rate as a function of engine speed and/or load.

Abstract: This disclosure deals with a fuel supply system for an internal combustion engine, the supply system including injectors for injecting fuel into the combustion chambers of the engine, and hydraulic means for adjusting the timing of injection. In one form of the invention, a pump-distributor assembly supplies fuel sequentially to a plurality of injectors, and the hydraulic timing adjustment forms part of the assembly. In another form of the invention, the hydraulic timing adjustment is included in the injectors. The hydraulic timing adjustment responds to parameters of the engine, such as load and/or speed, for varying or holding constant the time of initiation of injection, and is quickly responsive to changes in the parameters.

Abstract: The disclosure illustrates a tool which permits the adjustment of a pressure responsive flow controlling diaphragm assembly while the diaphragm is pressurized. The tool is used to adjust the position of a central shaft threaded through the diaphragm and held in place by a locking jam nut. The central shaft and locking nut are received in a center bolt having a hexagonal head which holds the diaphragm assembly together. The tool comprises a base that is mounted over the pressurized face of the diaphragm in place of its normal cover. A series of concentric sockets extend through the base for engaging the center bolt and the lock nut. A center shaft extends through the sockets and has a section of an allen wrench received in a corresponding recess of the central shaft of the diaphragm assembly. Suitable passages in the base enable the diaphragm to be pressurized to a desired adjustment pressure.

Abstract: This invention relates to a turbine housing which includes at least two separate passageways for receiving a flow of fluid and carrying same to a volute section for introduction to a turbine wheel, a first of said passageways being arranged to surround at least 160.degree. of a second of said passageways at the termination of said second passageway, the termination of said second passageway being at or upstream of the start of the volute section of the housing. The invention also includes a turbine and a turbocharger including the housing of the invention and an internal combustion engine in combination with such a turbocharger, and further includes the turbine housing of the invention in combination with an exhaust system in which exhaust ducts merge together at least one duct surrounding at least 160.degree. of another duct at the point of juncture.