Abstract: A floating tappet guide plate (60) is provided for an internal combustion engine having three tappets (40, 42, 44) per cylinder wherein the guide plate (60) is mounted for movement on the central tappet (40) and is shaped to cooperate with mating surfaces on the remaining tappets to prevent rotation of all three tappets. The tappet guide plate (60) is secured to the circumference of the injector tappet (40) so as to form an integral part thereof and includes opposed squared projections (64) and (66) which extend toward and approximate corresponding flat guide surfaces (50) and (51) of valve tappets (42) and (44), thus permitting the valve tappets to move freely in a vertical direction while simultaneously preventing their rotation and maintaining all three tappets substantially aligned about their central longitudinal axes.

Abstract: This disclosure relates to a coolant system for an internal combustion engine including a turbocharger and an aftercooler. The coolant system comprises an engine loop and an aftercooler loop both loops utilizing a single pump. The engine loop includes the pump, the engine block and head, a first radiator, and a radiator bypass branch. The aftercooler loop includes the pump, the aftercooler, a second radiator, and a radiator bypass branch. Each loop further includes a temperature responsive flow control thermostat for regulating the coolant flow through the associated radiator and/or bypass branch. The thermostat in the aftercooler loop is mounted in the coolant intake line leading to the aftercooler, but it responds to the temperature of the coolant leaving the aftercooler.

Abstract: A compact lubrication fluid filtering and cooling assembly including a bracket (16) for simultaneously mounting a pair of lubrication filters, (12 and 14) and a lubrication fluid cooler (10) on the block (4) of an internal combustion engine equipped with an internally contained lubrication circuit and providing fluid connection therewith. The bracket (16) provides a plurality of fluid flow passages (30, 77, 80, 88 and 91a) whereby lubrication fluid is conducted from the main engine oil discharge port (24) into bracket (16) into a first discharge port (26) leading to filter (12) from which oil is returned to the bracket for delivery to cooler (10), and from cooler (10) back through bracket (16) to the main return port on the engine block.

Abstract: Method and apparatus for precisely positioning a gear plate (10) on the block (12) of an internal combustion engine equipped with an accessory drive gear train (22, 24, 26, 28, 30, 32, 34 and 36) are disclosed whereby the precise positioning of the gear plate (10) results in the precise alignment of the gears mounted thereon. The present invention achieves this result by utilizing the shafts (56 and 58) of two of the gears (34 and 36) in the gear train as primary and secondary positioning means. Primary and secondary positioning bores (66) are formed in the engine block (12) and in the gear plate (10) and the primary and secondary gear shafts (60) inserted therein to position the gear plate (10) first at a point along a first axis relative to the engine block (12) and secondly at a point along a second axis relative to the engine block (12).

Abstract: The oil consumption of an internal combustion engine is determined by analyzing for the amount of water soluble zinc compounds found in the engine exhaust gas, after zinc dialkyldithiophosphate has been added to the oil.

Abstract: This disclosure relates to detection of air in the fuel supply system of an internal combustion engine of the character wherein the fuel rate supplied to the engine is controlled by regulating the feed pressure to a set of fuel injectors. A pressure sensor is connected in the fuel supply system and an engine speed sensor is connected to the engine. The engine is started, brought to a stable intermediate no-load speed, the throttle is snapped to a wide open position, and the rate of change of fuel pressure with time is sensed during the initial pressure rise from no load pressure to full load pressure. This measured rate is compared with a reference rate obtained from an engine where no air is present in the fuel system, and the pressure of air is indicated by a comparison of the measured and reference rates.

Abstract: This disclosure relates to a system for analyzing the performance of a reciprocating piston, internal combustion engine such as a diesel engine. Sensors are connected to the engine, which respond to various operating parameters, and signals representing the parameters are fed to computer processing equipment. Two of the parameters are the lubricant system pressure and the engine speed. To test the lubricant system, the engine speed is stabilized at maximum governed speed and then the fuel supply to the engine is quickly cut off. The lubricant system pressure and the engine speed data are sensed and processed as the engine decelerates, the processing including a comparison of the pressure-speed characteristic with a standard or reference characteristic.

Abstract: An engine structural assembly is disclosed including an integral head and upper cylinder section assembly for use in combination with an integral crankcase and lower cylinder section assembly wherein the upper and lower assemblies are formed to receive a wet cylinder liner which is adapted to be directly contacted by engine coolant over only the exterior surfaces of the liner which are received within the upper assembly. For purposes of forming a coolant cavity around the portion of the liner received in the upper assembly, a coolant seal is provided between the liner and the upper assembly adjacent the joinder zone between the upper and lower assemblies. In one embodiment the liner includes a mid stop located adjacent the upper and lower assemblies for holding the mid section of the liner in a fixed axial position and for applying an axial compressive force to the liner along the portion of the liner received within the upper assembly.

Abstract: This disclosure relates to apparatus for testing a hydraulic assembly. The assembly includes a member having an orifice formed through a wall thereof and a valve member spring urged toward one side of the wall so as to close the orifice. The apparatus includes an enclosure for the assembly and hydraulic pressure means for applying hydraulic pressure to the opposite side of the wall around the orifice. The pressure applying means includes means for gradually changing the hydraulic pressure and indicating the pressure at which the valve member moves to open the orifice. The apparatus further includes means for supporting the assembly on a link so as to simulate actual operating conditions.

Abstract: An integral turbine housing and exhaust collector section (44) is disclosed for use in an internal combustion engine turbocharger wherein the integral housing and collector section (44) is characterized by lighter weight, smaller size and greater efficiency than designs known heretofor. In the preferred embodiment, the turbine housing includes a volute section (46) containing twin 360.degree. volute passages (58, 60) into which a pair of parallel exhaust gas streams (34, 36) are directed by a pair of mirror image legs (48, 50) shaped to receive exhaust gases traveling in opposite direction toward the midsection of the engine (25) from a multi branch exhaust manifold (82, 84). Each leg (48, 50) contains a guide passage (81) having a curved central axis (1.sub.4) characterized by a constant radius of curvature (R.sub.1) at each point along the axis (1.sub.4) to provide the most aerodynamically efficient path of travel for each exhaust gas stream (34, 36).

Abstract: This disclosure relates to a system for analyzing the performance of a reciprocating piston, internal combustion engine such as a diesel engine. Sensors are connected to the engine, which respond to various operating parameters, and signals representing the parameters are transmitted to computer processing equipment. A speed sensor responds to the movement of an engine part such as the teeth of the engine fly-wheel ring gear, and the processor calculates a function representing the change in the instantaneous engine kinetic energy. The kinetic energy change data are accumulated during an engine acceleration run and again during a deceleration run. The signals from an engine cycle event sensor are processed to indicate the firing intervals of the cylinders and thereby to correlate the engine acceleration and deceleration data.

Abstract: This disclosure relates to a turbocharged low compression ratio diesel engine. An air by-pass is connected in parallel with the engine and is operable to by-pass a portion of the compressor output around the engine and into the exhaust manifold. A control is connected in the by-pass to regulate the amount of by-passed air, the control operating in response to the compressor output. The by-pass further includes means for heating the air flowing to the turbine to aid fuel combustion in the engine cylinders.

Abstract: This disclosure relates to a reciprocating piston internal combustion engine including a block and a head secured to the upper side of the block. A coolant circulation pump and manifolds are provided on one side of the block, and coolant inflow and outflow passages are formed through the side of the block and leading to the manifolds. A flow path is provided for each engine cylinder, the coolant for each cylinder flowing from a feed manifold and an inflow passage, around a cylinder, into the head, around the cylinder valves and injector, into the block, and out of the outflow passges to a collection manifold.

Abstract: A viscous fluid clutch is provided which embodies first, second and third drive members rotatable about a common axis. The second drive member is provided with an internal chamber in which both the first and third drive members are disposed. A predetermined amount of viscous fluid is disposed within the chamber. The third drive member is positioned between the first drive member and a chamber-forming wall of the second drive member. The second and third drive members rotate as a unit and the third drive member is movable axially independently of said second drive member. Corresponding surfaces of the first and third drive members form therebetween an annular fluid shear space concentric with the rotary axis of the drive members. The chamber-forming wall of the second drive member is provided with a thermal-responsive membrane having a segment thereof independently movable axially of the first drive member in response to predetermined ambient temperature changes.

Abstract: This disclosure relates to a unit-type fuel injector for an internal combustion engine such as a reciprocating piston internal combustion engine. The injector includes an injector body forming a plunger bore, and a plunger that reciprocates in the bore. A fuel supply passage and a drain passage are formed in the body, and a fuel injection chamber is formed at the lower end of the plunger bore. A feed hole connects the chamber with the supply passage, and a scavenge passage connects the supply and drain passages. During a retracted plunger, or fuel metering, portion of the injector cycle, the plunger opens the feed hole and closes the scavenge passage, and during a down plunger, or scavenging, portion of the injector cycle, the plunger closes the feed hole and opens the scavenge passage. An annular groove is formed between injector parts and surrounds the chamber, and the groove collects leakage. A restricted bleed hole connects the groove with the low pressure drain and removes the leakage.

Abstract: This disclosure relates to a system for analyzing the performance of a reciprocating piston, internal combustion engine such as a diesel engine. Sensors are connected to the engine, which respond to various operating parameters, and signals representing the parameters are fed to computer processing equipment. Two of the parameters are the intake manifold pressure and the engine speed. A turbocharger of the engine includes a turbine that is driven by the engine exhaust and a compressor that delivers air to the intake manifold. The performance of the turbocharger is tested by stabilizing the engine and the turbocharger at no-load, low-idle speed, quickly accelerating the engine to maximum governed speed, and determining how the turbocharger stabilizes after the engine stabilizes at the maximum speed.

Abstract: A bearing particularly suitable for high-speed operation is provided and includes inner and outer races, a plurality of spherical elements disposed between the races and in rolling contact therewith, and a retainer disposed between the races and maintaining the elements in annularly spaced relation. The retainer is of molded one-piece construction and embodies first and second ringlike sections disposed in axially spaced concentric relation. The ringlike sections are interconnected by a plurality of annularly spaced struts. Corresponding segments of the ringlike sections, disposed between a pair of struts, have oppositely disposed, spherically contoured surfaces in contact with a spherical element positioned therebetween.

Abstract: This disclosure relates to a seal which is particularly suited for use in a coolant pump of an internal combustion engine. The seal parts are subjected to high rotational torques during operation of the pump, and the seal parts are constructed and assembled in such a manner as to accommodate the rotational torques. The seal includes a flexible bellows having a composition which withstands the engine coolant on one side and oxidation on the other side, and has ribs which strengthen it. The seal faces are constructed of a material and have dimensions to reduce the magnitude of the rotational torques. The seal parts are secured together so as to prevent them from being pulled apart by the rotational torques, adhesives being used for this purpose which withstand the engine coolant.

Abstract: A combined gear cover and mount for an internal combustion engine is disclosed for use on an engine having a vibration damper mounted on a projecting end of the engine crankshaft wherein the gear cover includes a housing for enclosing the vibration damper while re-enforcing the engine mount formed integrally with the gear cover. The gear cover is adapted to connect with a gear plate mounted directly on the engine block to form an enclosure for the gear train of the engine. The gear cover also includes an integral fan clutch housing and a lubrication fluid transfer passage for an engine driven air compressor.

Abstract: A transducer calibrating assembly for calibrating the spindle transducers in a multiple spindle machine tool without the need for completely dismantling the machine to perform the calibration operation. The transducer calibrating assembly includes a torque coupling assembly 18 and a support coupling 20 which are connected by an articulated lever assembly 22 including a threaded shaft 26 a slide clamp 28 and a clamp shaft 24. Torque coupling assembly 18 includes a torque coupling 48 attached at a first socket to a master transducer housing 18, into which is inserted a spindle drive 5 of a spindle 3 on which is mounted the transducer to be calibrated. Support coupling 20 is attached directly to an adjacent spindle drive 5'. Leads 12 and 34 connect the transducer to be calibrated and the master transducer to measuring circuits 10 and 32, respectively. Measuring circuit 10 also includes variable resistors 148 and 150 to allow adjustments to be made in the measuring circuit of the transducer being calibrated.