Abstract: An adapter for attaching a radiator cooling fan to a water pump of an internal combustion engine, the adapter having spaced rear and front walls for attachment to the water pump and fan respectively with recesses extending radially into the body of the adapter between these walls for reception of a wrench used in securing the rear wall to the pump, and with these recesses being separated by radial projections securing the front and rear walls together, and with additional openings being provided in the front wall for passing a wrench rearwardly through that wall when necessary.

Abstract: A variable drive means for cam-operated intake and exhaust valves in an internal combustion engine, the variation being responsive to changes in load and rpm of the engine while the engine is running and being completely automatic. The disclosed device provides a slip drive for the camshaft, virtually unaffected by wear and with a predictable, constantly damped biasing action making the device suitable for mass production to suit any engine and preventing vibration and rough operation of the engine and giving automatic wear compensation.

Abstract: A flush attachment for a coolant hose accommodates gas or air induction to mix with a pressurized stream of cleaning liquid for efficient scavenging of rust or scale from machinery cooling systems. The construction of the attachment also protects against over pressurization and possible bursting.

Abstract: An internal combustion engine of the Otto or Diesel type, with one or several cylinders and associated reciprocating pistons in any of the conventional cylinder arrangements. The working space of every cylinder is connected by a bore with a feed line including a valve for introducing into the cylinder during a piston suction stroke an additional fluid such as air or a liquid. The bore/valve assembly may be provided at the cylinder head and/or at the lateral wall of a cylinder. The valve includes a valve chamber of a relatively large cross-sectional area. In the valve chamber is movably guided a valve member for establishing or blocking communication between the valve chamber and the cylinder working space in dependence upon the pressure within the cylinder.

Abstract: The invention provides a pneumatic control system for a pneumatically operated clutch in the drive to a cooling fan of a vehicle engine. There are two thermostat valves arranged in series in the pneumatic control line. One valve is positioned in the supercharged air passage and the other valve is in the liquid coolant passage. If the temperature at either valve becomes excessive the supply line 22 is connected to relief and the fan clutch automatically engages.

Abstract: An internal combustion engine and a method of operating same, comprising a combustion chamber having main and auxiliary sections. The air-fuel mixture compressed in the combustion chamber causes turbulence and swirling of the mixture in the auxiliary section. On ignition, the initial combustion rate in the auxiliary section is limited by the centrifugal force on the flame. The jet of gases rushing out of the auxiliary section is not swirled and controls the rate of burning in the main section to reduce peak flame temperature and hence, to reduce CO, NO.sub.x and HC emissions.

Abstract: A rotator assembly for a poppet valve employed in an internal combustion engine employs a garter spring mounted in a circular groove concentric with the valve axis. A rotator plate rests on the garter spring so that the plate turns incrementally through a small arc each time the valve completes its opening and closing cycle. Concentric coil compression springs resist opening movement of the poppet valve and both of these springs are supported by a valve retainer which rests on the rotator plate. The lower ends of both springs are supported at the same elevation and the springs are centralized by means of integral fingers struck from the retainer ring to hold one or both springs in central position.

Abstract: In a liquid cooled, assembled piston for an internal combustion engine which has a lower piston part, an upper piston part connected thereto, an annular cooling passage disposed in the upper piston part behind the top land and at least part of the ring-carrying portion thereof, an input coolant conduit in the lower piston part, a central cooling chamber disposed between the two piston parts and a supporting ring concentrically disposed on the underside of the upper piston part and between the annular cooling passage and the central cooling chamber, there is provided an oil guiding ring including a flange gripped between the two piston parts and a lip connected to the flange and protruding into the annular cooling passage for effecting the flow of the oil along the periphery of the cooling passage as it enters same from the input coolant conduit.

Abstract: A light metal die-cast head and cast iron block employ a low volume cooling system which cooperates with the differing thermal conductivity properties of said head and block. The cooling concept eliminates the conventional intricate water jacket and replaces it with continuous grooves which wrap hemi-cylindrically about each combustion cylinder in a thinly spaced relation. The grooves are exposed along their length at the deck surface of either the head or block. The total fluid mass in the system is reduced to as little as 1/5. There are two such grooves in the block which (a) extend from one end thereof to the opposite end, (b) are on opposed sides of the cylinder galleys and (c) have substantially no transverse flow in order to promote laminar or controlled flow.

Abstract: An in-line, two-cylinder engine comprises a crankshaft having crankpins at a 360.degree. setting and balancing means comprising a first counterweight rotating oppositely to, but at the same speed as, the crankshaft, such counterweight being so set that its center of gravity is remote from the crankpins when the pistons are at top dead center, such first counterweight being of a size and design such as to develop a centrifugal force whose amplitude is half the maximum amplitude of the reciprocating rectilinear inertia forces of the engine.

Abstract: A limited rotation roller tappet having an aperture and a slot formed in it. A locking bar having a narrow end portion and a shoulder portion prevents rotation of the tappet. The end portion of the locking bar is adapted to pass through both the aperture and the slot while the shoulder portion will not pass through the aperture. The locking bar preferably has a second narrow end portion and is held in place by a second similar roller tappet adjacent to the first having a slot through which the second end portion passes and an aperture through which the shoulder portion will not pass.

Abstract: An annular member is fitted about an extension of the cylindrical liner and is provided with a pair of concentric chambers. The inner chamber communicates with cooling ducts within the liner while the outer chamber communicates via a single conduit with cooling cavities in the cylinder head. One or more throttle openings are provided between the two chambers to throttle the flow of coolent between the chambers. The annular member is provided with suitable apertured partitions to permit bolts to pass through in order to secure the cylinder head to the cylinder block.

Abstract: An engine valve, reciprocally mounted in an engine, comprises a hollow stem having a head secured thereon and an annular face defined on the head adapted to engage an annular seat defined on an insert secured in the engine. A first tube is disposed in the stem to define a first passage therethrough and a fluted second tube is disposed between the stem and the first tube to define a plurality of second passages therethrough. A lower end of the first tube is open whereas a lower end of the second tube is closed by a cap whereby a coolant, such as oil, may be circulated through the first and second passages. A plurality of third passages are defined between the second tube and the stem to communicate with a chamber defined in the head of the valve, adapted to contain a vaporizable liquid coolant, such as water, therein. The insert has an annular passage defined therearound for circulating water about the seat and face for cooling purposes.

Abstract: An internal combustion engine oil filler cap has a positive crankcase ventilation (PCV) valve assembly integral with it so that crankcase vapors normally flow at below predetermined flow volumes directly into the engine inlet-manifold, while clean air from the engine air cleaner assembly flows into the crankcase past a control valve; the crankcase vapors at higher flow rates opening a bypass valve to flow vapors simultaneously into the inlet manifold and also the air cleaner assembly, the control valve at this time closing.

Abstract: A liquid cooling system for an internal combustion engine includes a conventional radiator and circulating system and pressure cap, the latter having pressure and vacuum relief valve components for limiting the maximum operating pressure of the system and for limiting negative pressures to avoid damage during cooling after engine shutdown. A second, temperature responsive, pressure relief valve provides a lower system relief pressure as long as the temperature of the coolant in the radiator top tank remains below a certain level. When that level is exceeded, a thermally actuated valve excludes the second pressure relief valve from the system and maximum operating pressure is then limited, at a higher level by the valving of the pressure cap. In an alternative embodiment, an infinitely variable pressure relief valve responsive to and controlled by changes in coolant temperature replaces the fixed second pressure relief valve and its thermal actuator.

Abstract: A hydraulic tappet or lash adjuster of simplified design is disclosed for use in the valve train of an internal combustion engine equipped with dual ramp cams. In one embodiment, the disclosed tappet is designed to respond to the presence or absence of control pressure supplied through a single supply port to cause variation in the timed relationship of valve opening and piston movement whereby the internal combustion engine may be operated in a power mode or a braking mode. In another embodiment, a pressure relief outlet is provided in the tappet for cooperation with a pressure relief port to insure collapse of the tappet thereby to prevent the valve from being opened beyond a pre-determined fully open position.

Abstract: An engine valve comprises an elongated hollow stem having a hollow head secured on an end thereof. A tube is disposed in the stem to define an inlet passage therethrough and an outlet passage between the tube and the stem. An annular oil distributor and heat conducting member, exhibiting a relatively high thermal conductivity, is secured to the tube and is disposed adjacent to an annular face defined on the head of the valve to conduct heat therefrom. The member defines a chamber along with an annular cap secured to the head of the valve. The chamber communicates with the inlet passage and the cap and the member function to direct oil radially outwardly to ports formed through the member to communicate oil to the outlet passage. The tube is preferably bent intermediate its ends to engage the stem in bearing contact to dampen vibration of the tube during operation.

Abstract: An engine retarder for a fuel injection engine wherein a charge of fuel is pumped to each cylinder under pressure in timed sequence to reach the cylinder near top dead center of its stroke. A selectively operated bypass valve enables that measured charge of fuel to be delivered at the same time in the cycle, not into the cylinder, but to an actuator which opens the cylinder's exhaust valve near the completion of the piston's compression stroke and then allows the valve to close, the charge of fuel being returned to the tank.

Abstract: An engine crankcase has oppositely inclined surfaces thereon, to which cylinders equipped with cooling fins are attached, to form a V-shaped engine. The crankcase has a crankshaft rotatably mounted therein, the front end of which projects from the front of the crankcase and has a cooling fan mounted thereon, the fan being housed within a cover adapted to pass cooling air backwards over the cylinders. A cam shaft is mounted vertically above the crankshaft, and the two are connected by gears mounted at the front of the crankcase. The rear end of the V-shaped region between the cylinders is open to provide for the escape of foreign matter, and the engine is balanced by locating the governor and the lubricant pump within the rear end of the crankcase.

Abstract: A motor vehicle equipped with a liquid-cooled internal combustion engine. A radiator is provided, the same having first and second regions which themselves have aligned edges that form an edge of the radiator. Conduits are provided for allowing the flow of coolant through the two regions of the radiator in opposite directions. A coolant chamber extends along the edge of the radiator, this coolant chamber being divided into first and second sub-chambers by a partition which extends transversely to the edge and which defines the demarcation between the first and second regions of the radiator. The first and second sub-chambers of the coolant chamber communicate with the first and second regions of the radiator, respectively. A thermostatic valve arrangement is provided which allows the flow of coolant from the first sub-chamber to the second sub-chamber, and hence through both the first and second radiator regions, only when the temperature of the coolant is above a predetermined temperature.