Abstract: A fuel injection system is disclosed for an internal combustion engine that has multiple combustion chambers and a camshaft which cyclically imparts pressurization energy to and recovers pressurization energy from fuel being supplied to the engine. The fuel injection system includes a plurality of unit injectors, a camshaft linkage which simultaneously reciprocates pressurizing plungers of a set of at least two unit injectors and an interconnecting line which allows selective fluid interconnection between fuel pressurization chambers formed within the unit injectors. The interconnection line allows fluid linkage of the volume of fuel which is simultaneously pressurized and depressurized within the interconnected fuel pressurization chambers of a first set of unit injectors.

Abstract: Manufacturing imperfections and component failures in the fuel system of an engine, can lead to non-uniform torque production among the cylinders. Non-uniform cylinder torques can be observed as small engine speed fluctuations about the average engine speed at any given operating point. Engine speed data contains fluctuations at different frequencies. The amplitude of fluctuations at some known frequencies tell about the health of the fuel injectors and the engine. In the present invention, the instantaneous engine speed data is filtered by discrete second-order band-pass filters to find the engine speed fluctuations at particular frequencies. The output of the filters is identical to power spectral density of speed signal at those frequencies. The amplitude of each filter output is then compared to a predetermined threshold value. If the amplitude is bigger than this threshold, it indicates the existence of low fueling or high fueling fuel injectors.

Abstract: A kit of tooling components for use in facilitating the removal as well as the installation of a crankshaft seal includes a housing assembly which is constructed and arranged for attachment to a crankshaft seal during the removal procedure and for pushing the crankshaft seal into position during the installation procedure. The kit further includes a guide pin which is constructed and arranged for insertion through the crankshaft seal and into one of the crankshaft seal mounting holes in order to establish proper alignment for the crankshaft seal as it is pulled off during the removal procedure and as it is pushed on during the installation procedure. The kit further includes a plurality of self-tapping screws which are used during the removal procedure for attaching the housing assembly to the crankshaft seal.

Abstract: The present invention relates to an engine diagnostic system for detecting malfunctions in an engine system having a variable geometry turbine exhaust system. The engine diagnosis system includes an electronic control module adapted to periodically initiate a preprogrammed variable geometry turbine diagnostic routine.

Abstract: A fastener for venting gas around the shank of the fastener. The present invention includes various embodiments for venting gases such as combustion gases that seep from a head gasket of an internal combustion engine to the area around the shank of a cylinder head bolt, as one example. The various vent paths include vent paths directly through the bolt, past the bearing surface of the bolted member, or past a washer between the fastener and the bolted member. These vent paths prevent gases from building up in the chamber between the fastener shank and the clearance hole of the bolted member.

Abstract: A kit of tooling components for facilitating removal of a gear from a shaft includes a plurality of jaw members that are adapted to fit through blanking holes defined in the gear. The jaw members are further adapted to engage the gear. The kit further includes a set of studs with each of the studs adapted to engage one of the jaw members and a plate adapted to couple to the studs. The kit further includes a jack adapted to engage and fit between the plate and the shaft. Included as a part of this disclosure is a method of removing a camshaft gear by use of the kit of tooling components.

Abstract: A system is disclosed for implementing a technique for idling a diesel engine. The system comprises an engine controller, an air temperature sensor, and an engine speed sensor. The air temperature sensor provides a first signal indicative of an internal temperature of an intake manifold in fluid communication with the diesel engine. The engine speed sensor provides a second signal indicative of a rotational speed of a crankshaft of the diesel engine. In response to various other signals collectively indicating the diesel engine is idling, the engine controller controls the supply of fuel to the diesel engine as a function of the first signal. When the first signal is below a temperature level, engine controller supplies fuel to each combustion chamber of the diesel engine for a fixed period of time to achieve a desired range of rotational speeds of the crankshaft as indicated by the second signal.

Abstract: The present invention relates to a method and apparatus for removing hydrocarbons from the exhaust stream of a diesel engine prior to cooling the exhaust for recycling through the intake manifold. A filter is used to remove hydrocarbon combustion products, including particulate matter, from the exhaust at a point after the exhaust gasses leave the exhaust manifold and before the exhaust gasses enter an exhaust gas cooler. Reduction of the hydrocarbon levels in the exhaust gasses slows or prevents buildup of hydrocarbon residue downstream of the filter, such as in the exhaust gas cooler, reducing the frequency of the requirement for cleaning or replacing the filter and effectively extending the life of the exhaust system.

Abstract: The invention relates to an apparatus comprising a pump unit 22 incorporating an engine driven low pressure pump for drawing fuel from a reservoir and an engine driven high pressure pump connected to supply fuel drawn by the low pressure fuel pump under pressure to a common fuel rail 18. The assembly also includes fuel filter 48 connected in the fuel flow path between the low pressure and the high pressure pump. The fuel filter comprises a fuel filter head 30 mounted directly on, or formed integrally with, the housing of the pump unit 22. The filter head 30 includes a plate 30b for mounting a filter housing 48 containing a filter element, and is formed with a first internal flow passage to enable fuel pressurised by the low pressure pump to be supplied to one side of the filter element and a second flow passage connected to the other side of the filter element to enable the filtered fuel to be supplied to the high pressure pump.

Abstract: The present invention provides a mechanism of retaining a rocker lever ball socket on a rocker lever ball. The mechanism provided is a retaining cap which is adapted to fit over and securely engage to the socket through a tab and groove arrangement and is made of a slightly elastic material and includes a restricted opening sized smaller than the fullest diameter of the rocker lever ball. During assembly, the retaining cap first interlocks with the socket by a tab and groove arrangement, and the lever ball is then pushed through the restricted opening. The restricted opening, being slightly elastic, enlarges to allow passage of the ball and retracts to a size smaller than the ball so that it is retained thereon.

Abstract: One embodiment of the present invention includes sensing speed or an internal combustion engine that includes a manifold coupled to an air pathway and a gaseous fuel line, sensing manifold pressure, and sensing manifold temperature. Air mass flow rate is determined as a function of the sensed engine spaced, manifold pressure, and manifold temperature. Fuel mass flow rate in the fuel line is sensed and fuel is controlled through the fuel line in accordance with the air mass flow rate and the fuel mass flow rate.

Abstract: A system for executing a method for estimating atmospheric air pressure ambient to an internal combustion engine as a means to preclude the need for an atmospheric air pressure sensor. The system includes an absolute boost pressure sensor, an engine speed sensor, and an electronic control unit. The absolute boost pressure sensor provides a first signal that is indicative of the absolute boost pressure of the air received within the intake manifold of the engine. The engine speed sensor provides a second signal that is indicative of the engine speed of the engine. The electronic control unit generates a third signal that is indicative of the atmospheric air pressure ambient to the engine, a fourth signal that is indicative of a gage boost pressure of the engine, and a fifth signal that is indicative of a fuel command for the engine. When the engine is idling, the atmospheric air pressure signal is generated as a function of the absolute boost pressure signal.

Abstract: A system is disclosed for implementing a technique for managing torque of a drivetrain. The drivetrain includes an air intake passage having a throttle valve, an internal combustion engine having an output shaft, a transmission having an output shaft, and a rotational propulsion member operatively coupled to the transmission by a propeller shaft and a drive axle. The system includes a throttle valve sensor, an engine speed sensor, a transmission speed sensor, a vehicle speed sensor, a transmission controller, and an engine controller. The throttle position sensor provides a throttle position signal that is indicative of a rotational position of the throttle valve. The engine speed sensor provides an engine speed signal that is indicative of a rotational speed of the engine output shaft. The transmission speed sensor provides a transmission speed signal that is indicative of a rotational speed of the transmission output shaft.

Abstract: A method and apparatus is disclosed for recursively estimating vehicle mass and/or aerodynamic coefficient of a moving vehicle. The vehicle speed and push force data are collected and a segment of qualified data is then selected from the collected data. Newton's second law is integrated to express vehicle mass and/or aerodynamic coefficient in terms of vehicle push force and vehicle speed. This expression is then used in a recursive analysis of the qualified data segment to determine an estimated vehicle mass and/or aerodynamic coefficient.

Abstract: A pulley alignment tool for checking the centerline alignment between a driving pulley and a driven pulley which are connected by a V-belt includes a targeting laser which is constructed and arranged to generate a beam of light which will be directed from a location adjacent the driving pulley to a location on the surface of the driven pulley. The targeting laser is mounted in a holder and the holder is constructed and arranged for attachment into the groove of the driving pulley. As a preliminary step, the V-belt which initially connects the driving pulley and driven pulley is removed, thereby making the driving pulley groove accessible for mounting the holder. An elastic cord is used to encircle the driving pulley and is connected to opposite ends of the holder in order to maintain the holder in a fixed position on the surface of the driving pulley. The targeting laser is used to check the centerline alignment between the driving and driven pulleys.

Abstract: A kit for both removal of a camshaft from a cylinder block and for installation of a camshaft into a cylinder block includes a minimum of six unitary, molded plastic camshaft guides, an extraction tool, and a pilot to be attached to a rear face of the camshaft in order to provide additional support. Each camshaft guide has a generally C-shaped body and is constructed and arranged to fit onto a corresponding one of the camshaft lobes. Due to the “beyond center” configuration of each camshaft guide, a significant pulling force is required to remove each guide from its corresponding camshaft lobe. Each guide includes an internally-threaded hole which mates with a threaded end on the extraction tool and the extraction tool is used to manually pull each guide off of its corresponding lobe. The pilot includes a generally cylindrical body and a rod inserted therethrough having a threaded tip at one end and an enlarged head at the opposite end.

Abstract: A fuel injection system is disclosed for an internal combustion engine that has multiple combustion chambers and a camshaft which cyclically imparts pressurization energy to and recovers pressurization energy from fuel being supplied to the engine. The fuel injection system includes a plurality of unit injectors, a camshaft linkage which simultaneously reciprocates pressurizing plungers of a set of at least two unit injectors and an interconnecting line which allows selective fluid interconnection between fuel pressurization chambers formed within the unit injectors. The interconnection line allows fluid linkage of the volume of fuel which is simultaneously pressurized and depressurized within the interconnected fuel pressurization chambers of a first set of unit injectors.

Abstract: An air-exhaust mixer assembly includes an air intake to supply air and an exhaust gas intake to supply exhaust gas. A mixer is fluidly coupled to the air intake and the exhaust gas intake. The mixer has an inner passage and an outer passage defined therein along a longitudinal axis. The inner passage and the outer passage are adapted to mix the air and the exhaust gas by expanding the air and the exhaust gas in radially opposite directions with respect to the longitudinal axis.

Abstract: An engine block 10 is disclosed having machined front and rear faces. Each of the front and rear faces is capable of receiving and sealing against a housing (20,40) enclosing a gear train for coupling the engine crankshaft to a camshaft of the engine. The front face is additionally capable of directly receiving and sealing against an engine front cover while the rear face is additionally capable of directly receiving and sealing against a flywheel housing. In this way, the same engine block may be selectively assembled into an engine having a front mounted or a rear mounted camshaft gear train.

Abstract: An arrangement for authorizing transfer of software into one or more embedded systems includes a service/recalibration tool connectable to one or more embedded control units. A service technician or other operator of the tool obtains a hardware identification code corresponding to an identifier associated with an embedded control unit, or to an identifier associated with the tool, and also establishes a download number corresponding to the desired number of downloads when the identifier is associated with the tool, and a software identification code corresponding to an identifier of software to be transferred from the tool to the embedded control unit, and provides this information to a provider of the software who creates one or more passwords based thereon. The service technician may then use the one or more passwords to transfer one or more password-protected portions of the software from the tool into the one or more embedded control units.