Abstract: In a diesel engine having one inlet valve and one exhaust valve, with an inlet passage having a spiral profile to create rotary air turbulence in a combustion chamber of at least 1.5 times the engine speed, an injector pump, driven by an engine camshaft, supplies high pressure fuel to a fuel injector mounted in the cylinder head, which injects the fuel into the combustion chamber. The injector, which includes a nozzle tip having 4 to 6 jets, is inclined from the axis of the cylinder bore at an angle i of equal to or less than 30 degrees. The injector is also eccentrically mounted from the axis of the cylinder bore at an eccentricity value e that is less than or equal to 0.2 times the bore of the cylinder D. Also, the depth H of the combustion chamber to outer diameter d of the combustion chamber is related by the ratio H/d which is greater than 0.2 but less than 0.5.

Abstract: The invention is an improved cooling system for an internal combustion engine wherein an expansion and degasification tank is placed in the cooling system allowing the liquid containing gases to enter the degasification portion of the tank tangentially thereby creating a swirling vortex flow of the coolant containing gases. The coolant is permitted to leave the degasification portion through a peripheral annular gap in the lower part of the tank created by a conical deflector which collects the gases in the coolant and is arranged so as to permit the gases to pass to the expansion of the tank. A check valve mounted in the outlet of the expansion tank prevents any backflow of liquid. Further, the gases are allowed to escape into the atmosphere through a pressure release valve mounted to the top portion of the expansion chamber.

Abstract: A device to circulate lubricating oil by radial penetration of the oil into a revolving hollow shaft to lubricate isolated components. The device has a stator and a rotor within a chamber in the stator. Both the stator and rotor are fixed to the shaft. The rotor has a plurality of radial holes. The hollow shaft also has a radial hole which communicates with the internal bore in the shaft. When the shaft is rotated, centrifugal forces act on the oil in the radial holes so as to drive the oil into the chamber and to draw oil through a port around the shaft in the stator. The centrifugal forces also act on any oil in the radial hole so as to tend to drive the oil into the chamber. However, these centrifugal forces are overcome by the pressure forcing the oil into the chamber. Thus, the oil pressure in the chamber drives the oil into the radial hole into the internal bore of the hollow shaft to lubricate isolated components.

Abstract: A processing device capable of starting the sequence of the speed change operations automatically in the gearbox of a vehicle, such as the automatic transmission of a truck. A first comparator compares the data received from a gearbox condition detecting device and that received from a speed ratio selection device. In the event of a difference, the comparator sends to a gearbox control device either a pulse for increasing by one speed ratio, or a pulse for decreasing by one speed ratio.

Abstract: A processing device capable of starting the sequence of the speed change operations automatically in the gearbox of a vehicle, such as the automatic transmission of a truck. A first comparator (302) compares the data received from a gearbox condition detecting device (500) and that received from a speed ratio selection device (200). In the event of a difference, the comparator (302) sends to a gearbox control device (400) either a pulse for increasing by one speed ratio, or a pulse for decreasing by one speed ratio.

Abstract: A cylinderhead assembly system for ensuring fluid-tightness of assembly of a cylinderhead and the cylinder block of a thermal piston engine, and particularly a diesel engine. A plurality of screws are disposed around the cylinder liner and are oriented substantially parallel to the longitudinal axis of the liner. The stem of each screw passes between two raised support portions, e.g., the upper part of each cylinder liner, and a boss, with each screw being mounted as a compensator between the two raised support portions to balance stresses at the time of the tightening operation.