Abstract: A closed mold for a cylinder head is provided having two widely spaced wall portions, at least one of the widely spaced wall portions being in communication with the atmosphere through an opening in the closed mold. The widely spaced wall portions define the ends of a long open cavity within the mold and provide core supporting portions for a long, narrow core element adapted to form an elongated, narrow open cavity within the casting. A narrow core element is provided between the core supporting portions of the widely spaced wall portions of the mold without intervening support. The long narrow core element comprises an outer portion of casting sand adapted to form the walls of the elongated, narrow open cavity of the casting extending between the core supporting portions. The narrow core element further comprises an inner portion for supporting the long, narrow core element and for providing a gas passage extending to the one wall portion.

Abstract: A tandem fuel pump assembly for internal combustion engines includes a housing having a fixed spring retainer mounted thereinside which supports a diaphragm pump biassing spring thereabove to force a diaphragm defining the movable lower wall of a first pumping chamber to reduce the volume thereof and eject fuel from an outlet thereof preferably through a fuel filter to the inlet of a second piston pumping chamber. A second biassing spring supported below the spring retainer forces a pumping piston downwardly to reduce the volume of the second pumping chamber and thereby eject fuel therefrom to an engine fuel rail for injection into the engine therefrom.

Abstract: A clamp securely clamps together a plurality of tubular structures such as tubing, hoses and electrical harnesses. The tubular structures need not be of the same diameter and can be up to at least 2 inches in diameter. The clamp includes a planar base portion having two upright end flanges which each include a clasp element projecting outwardly therefrom. A rubber strap is secured over the base portion, and is engaged to the base portion over the top of the flanges at each end thereof by means of openings therein engaging a respective clasp element.

Abstract: A microprocessor engine control for an internal combustion engine powered truck is provided with a clutch priority engine speed control by the inclusion of a clutch pedal switch for sensing incipient clutch engagement at vehicle launch. The microprocessor executes an algorithm that takes control of engine speed away from the driver until the launch is successfully completed. The algorithm causes the engine to operate at a speed that has been predetermined to minimize wear and tear on the powertrain. The algorithm includes a false start feature that resets the alogrithm in the event of an aborted launch.

Abstract: An engine diagnostic testing procedure requires that the fuel shut-off solenoid valve remain connected to the engine's electronic control module during diagnostic testing. A normally closed set of contacts of a relay is interposed in the wiring between the module and the valve. This relay is part of an automatic shut-down circuit that uses several principal components of a known shut-down system along with two additional relays and three diodes to provide the engine with an automatic shut-down system that is independent of the engine's electronic control module, yet that will not disconnect the fuel shut-off solenoid valve from the electronic control module during diagnostic engine testing.

Abstract: An aerodynamic vehicle side mirror head of the vertically elongated rectangular type commonly used on large vehicles such as trucks includes an aerodynamically shaped mirror housing having a reflecting surface mounted to a rearward facing surface thereof and a set of cambered, airfoil-shaped, turning vanes with an upstream vane located along the leading vertical edge of the mirror housing on the side thereof closest to the vehicle can and having an outlet disposed to direct airflow exiting therefrom laterally onto the mirror surface and a downstream vane located along the trailing vertical edge on the opposite side of the mirror housing and having an outlet disposed to direct air flowing therethrough in a substantially downstream direction.

Abstract: A paint booth facility for painting truck cabs and attachments in which electronic robots operating electrostatic paint guns apply successive coats of paint. The object to be painted is indexed through a series of spray booths, flash-off booths and finally curing ovens all of which have a contained atmosphere. The level of volatile organic compounds (VOC) in the paint booth atmosphere is not permitted to exceed 25% of its lower explosive limit but is maintained at a level that is higher than permitted in paint booths that are occupied by humans. A portion of the recirculated paint booth atmosphere is directed to a thermal oxidizer where it is ignited autogeneously, and this portion is replaced by fresh air that has been conditioned.

Abstract: A trailer load shifting device comprises a framework adapted to ride along a trailer and to which weights are engageable. The framework incorporates wheeled carriers which are retractable and extendable by actuation of air bags positioned between the framework and the wheeled carriers. When the wheeled carriers are retracted, the framework of the device rests upon frame members of the trailer and is engaged to the trailer framework by removable pins. When the pins have been removed, the air bags are filled, extending the wheeled carriers and simultaneously raising the framework off the trailer frame members. Then, upon light snubbing of the brakes of a slowly moving tractor engaged to the trailer, the device can be shfited fore or aft, as desired, by its inertia.

Abstract: A flexible header mounting for an engine mounted fuel filter includes structure for dependingly engaging a fuel filter and its associated plumbing and a planar base member by means of which the header is mounted to the engine supporting structure. Flexible engagement of the base member to the engine is accomplished by means of bolts, each of which has a compression spring mounted thereon over the shaft thereof, between the base member and the bolt head. The free threaded end of the bolt extends through a bore drilled into the base member and engages within a threaded bore in the engine housing. The distance between a center point of the bolt and a forward edge of the base plate is as large as possible while the distance between the center point of the bolt and the rear edge is as small as possible, creating a joint wherein the header may pivot rearwardly upon impact but will be unable to pivot forwardly under severe deceleration.

Abstract: A cast tubular structure including an integral hose connection element formed thereon is produced by lost foam casting wherein a circular socket seat is formed on a pattern for a body portion of the cast tubular structure and a cylindrical pattern for the integral hose connection element is formed by a mold without vent openings on the mold surface in the area of the cylindrical pattern corresponding to the hose sealing surface of the cast tubular structure. The pattern sections are joined with the pattern section for the hose connection element sealing within the circular socket seal formed in the body portion of the cast structure.

Abstract: A two-stage, hydraulic, electronic unit fuel injector powered by lubricating oil from the engine crankcase includes a housing, a pilot valve disposed in the housing and connected to an electronically-controlled solenoid for movement with the armature thereof, a slidable poppet valve disposed in the housing beneath the pilot valve and controlled by the action of the pilot valve, and a fixed intensifier dump valve disposed within the poppet valve. An intensifier piston, controlled by the action of the poppet valve, is disposed within the housing below the intensifier dump valve which upon receiving high pressure fluid, in this case, lubricating oil, is forced downwardly to inject fuel received in the lower end of the injector from a common rail out of the injector tip under very high pressure.Both the pilot valve and the poppet valve are provided with valving arrangements, in the form of valve seats.

Abstract: A closed loop engine crankcase breather system is provided with a breather tube engaged between a rocker arm housing of the engine and an intake air tube of the engine downstream of the air cleaner therefor. The end of the breather tube within the intake air tube is curved so that the opening thereof faces directly into the stream of air flowing through the intake air tube to thereby reduce the vacuum within the crankcase by the velocity head of the intake air stream and thus maintain a smaller pressure differential between the interior cavity of the engine and the atmosphere.

Abstract: An accessory mounting apparatus for use on a heavy duty truck engine comprises a unitary bracket having parallel lateral walls defining an interior cavity which securingly receives a side portion of a front engine cover. The lateral walls extend to an outermost ear portion, to which an alternator is mounted in depending relationship, and upwardly to a horizontal plate portion having a mounting pad forward of the ear portion to which a coolant corrosion filter is dependingly mounted, and a mounting platform rearwardly inwardly of the mounting pad to and above which an air conditioning compressor is mounted, and forwardly extending boss attached to a forward wall of the bracket to which a constant tension pulley assembly is mounted to tension a belt which drives the compressor.

Abstract: The pointer of an air-core meter instrumentation gauge comprises a driven hub via which the pointer is separably attached to a driving hub on the rotor of the air core meter movement. The driving hub is press-fitted to the rotor in proper circumferential alignment so that when the pointer is attached, the pointer will be inherently properly circumferentially oriented too. This is accomplished by providing a keyed connection between the driving and driven hubs such that the pointer can be assembled to the driving hub in only one particular circumferential orientation. The hubs also have a snap-together catch feature that is additional to the keyed connection.

Abstract: A one-piece cylinder head casting, including reliably located passageways for fuel-air intake, for exhaust and for coolant, is formed by a plurality of interengaging one-piece core elements including a one-piece coolant jacket core, a one-piece exhaust core and a one-piece fuel-air intake core, all reliably positioned and held together in an integral core assembly. Preferably, a further core element having a plurality of core supporting and positioning surfaces provides surfaces that mate interfacing surfaces of the one-piece water jacket core, one-piece exhaust core and one-piece intake core and support such cores in position with respect to one another, and the intake core may be provided with a plurality of interfacing surfaces to lock the plurality of core elements into a unitary core assembly. Such cylinder head casting may also be provided with integral walls forming a long, open intake manifold cavity in the side of the cylinder head.

Abstract: A reusable hose separating clip comprises an elongate one piece plastic unit including a living hinge centrally located along the length thereof. The hinge forms two clip halves thereabout which are substantially mirror images of one another except for the latching structure at the free end of each half. Each hinge half includes arcuate areas separated by flats, with corresponding arcuate areas on the clip halves defining circular channels therebetween for engaging hoses therein when the clip halves are pivoted together about the hinge and the latch structures are engaged. When the clip halves are engaged, the corresponding flats are spaced from one another to allow for use with oversized or swelled hoses.

Abstract: A hood assembly for a conventional truck includes structure for maintaining alignment of the hood relative to the cab during operation of the truck, structure for sealing the gap between the hood and a cowl of the truck, and a four bar linkage hood motion control apparatus, with or without a secondary pivot which can be activated to increase the degree of forward tilt of the hood. The four bar linkage provides for easy forward tilting of the hood assembly by causing horizontal movement of the hood in the first phase of the opening motion followed by pivoting of the hood toward a vertical position to allow access to an engine compartment therebeneath. The linkage is connected to the hood adjacent the center of gravity thereof and provides a truck tilt hood assembly which is significantly decreased in weight.

Abstract: A two-stage, hydraulic, electronic unit fuel injector powered by lubricating oil from the engine crankcase includes a housing, a pilot valve disposed in the housing and connected to an electronically-controlled solenoid for movement with the armature thereof, a slidable poppet valve disposed in the housing beneath the pilot valve and controlled by the action of the pilot valve, and a fixed intensifier dump valve disposed within the poppet valve. An intensifier piston, controlled by the action of the poppet valve, is disposed within the housing below the intensifier dump valve which upon receiving high pressure fluid, in this case, lubricating oil, is forced downwardly to inject fuel received in the lower end of the injector from a common rail out of the injector tip under very high pressure.