Abstract: A reciprocating engine, preferably a high speed internal combustion engine, includes means for reducing vibration.The engine has at least one piston, a connecting rod connected at one end to the piston and at the other end to a crankshaft. A pair of balancing links are pivotally mounted on the crankshaft and guide links constrain the balancing links to follow paths generally normal to the crankshaft axis and in opposition to the piston.The guide links extend in opposite directions and are attached to the balancing links and to a fixed point to balance out the vibrational forces of the engine.

Abstract: A V-type internal combustion engine having double overhead camshafts contains automatic mechanism for maintaining tension in the endless timing chain which drives the camshafts from the engine crankshaft. The two sides of the V-type engine are substantial duplicates. A tensioner body engages the slack side of the chain and is caused to move in a direction to tighten the chain to maintain desired chain tension. The tensioner body is operated by a curved arm member which is pivoted to a stationary support at a position in the dead space between the driven sprockets for the two camshafts. Resilient means acts on the curved arm member in a direction to tighten the tensioner body against the chain, and a rocking member acted on by the resilient means prevents retrograde movement of the curved arm member, so that chain tension is maintained even when the chain stretches after a period of use.

Abstract: An even firing 90.degree. V6 four stroke cycle engine is provided with a single line balancer having a combination of primary balance weights and secondary Oldham coupling balancers rotating opposite crankshaft rotation which, combined with crankshaft counterweights, provide complete offsetting of the engine primary rotating unbalance couple together with offsetting of a large portion of the engine secondary rotating unbalance couple and leaving a small residual secondary unbalance couple for absorption by the engine mounting system.

Abstract: A late injection direct injection stratified charge spark ignition engine is provided with a catalytic grid disposed in the path of injected fuel spray and downstream of the point of spark ignition to assist the completion of combustion of previously ignited fuel spray as well as to ignite and cause the combustion of previously unignited fuel elements passing therethrough. Improved combustion and reduced hydrocarbons emissions are anticipated.

Abstract: An intake passage structure for an internal combustion engine includes a primary air-fuel mixture passage disposed remotely from a water jacket located below a secondary air-fuel mixture passage. A secondary slow fuel supply passage extends from a float chamber adjacent to the primary air-fuel mixture passage so that fuel in the secondary slow fuel supply passage will be cooled by an air-fuel mixture flowing through the primary air-fuel mixture passage, thereby preventing vapor lock from occuring in the secondary slow fuel supply passage. The primary air-fuel mixture passage is composed of a common passageway, a distribution slot and branch slots for supplying an air-fuel mixture to engine cylinders. The distribution and branch slots are closed by a cylinder head. Any liquid fuel in the distribution and branch slots are vaporized with heat from the cylinder head.

Abstract: An internal combustion engine combines the efficiency of a radial engine with the practicality of a piston and crankshaft arrangement. A stationary frame supports a stationary sun gear, and a rotor is pivoted about the axis of the sun gear. The rotor carries three crankshafts at 120.degree. intervals, each having an eccentric portion. Each crankshaft is fixed to rotate with a respective planetary gear, and all the planetary gears mesh with the sun gear and have the same pitch diameter as the sun gear. The crankshaft eccentricity is substantially 1/3 times the pitch radius of a planetary gear. The eccentric portion of each crankshaft has roller means rotatable about the same axis as the connection between the connecting rod and the eccentric portion, and a ring member with an internal surface surrounds and contacts all of the roller means simultaneously, the ring member being free to rotate about its own axis. Three valves admit the combustible mixture to each cylinder.

Abstract: In a reciprocating-piston engine including operating cylinders, a piston associated with each cylinder, a crankshaft with crankpins, and piston rods for connecting the pistons to the crankpins, a mass balancing arrangement has a balancing mass connecting rod connected to the crankshaft, a balancing mass connected to the balancing mass connecting rod, and a rocker arm for guiding the balancing mass with one end connected to the balancing mass connecting rod and with the other end connected to an extension of a piston rod beyond its connection to a crankpin. A rocker arm or a pair of rocker arms could be used with each balancing mass, depending upon the arrangement of the cylinders.

Abstract: A valve lash adjuster for a horizontally opposed engine in which valves are horizontally disposed and the adjuster for each valve is also horizontally disposed. The adjuster has a cylindrical body and a hollow plunger. The tip end of the plunger engages with a rocker arm of a valve lifting device of the engine. The plunger has a ball check valve for trapping oil in a pressure chamber defined behind the plunger and is outwardly biased by a spring for taking up clearance in the valve train. Passages are provided for supplying the lubricating oil into an annular groove provided around the cylindrical body. The passages are located at such positions that the oil remains in the groove. The inside chamber of the plunger is communicated with the annular groove through a hole located to communicate with the annular groove at the oil remaining zone, so that the oil is maintained in the inside chamber of the plunger and the pressure chamber.

Abstract: An air-fuel mixture intake construction for an internal combustion engine comprises a primary intake system for supplying an air-fuel mixture under a full range of engine loads, a secondary intake system for supplying an air-fuel mixture under medium and high engine loads, and an induction passage having one end opening into a secondary intake passage immediately upstream of a secondary throttle valve disposed therein, and the other end opening immediately upstream of an intake valve for a combustion chamber. The open end of the induction passage in the secondary intake passage is spaced inwardly from an inner wall surface of the secondary intake passage to prevent fuel in liquid form from flowing into the induction passage from the secondary intake passage.

Abstract: A supercharged internal combustion engine comprising a combustion chamber of which volume cyclically changes in response to a rotation of the engine to conduct engine operating strokes including an intake and compression strokes, an intake system for supplying intake gas to the combustion chamber.

Abstract: An intake port structure for an internal combustion engine having a primary intake passage defined in a cylinder head for supplying an air-fuel mixture into a combustion chamber in a full range of loads, and a secondary intake passage defined in the cylinder head for supplying an air-fuel mixture into the combustion chamber under relatively high load conditions. The primary intake passage has a first outlet port opening into the secondary intake passage immediately upstream of the valve face of an intake valve. The secondary intake passage has a second outlet port opening into the combustion chamber through the valve face. A wall projects sidewardly into the secondary intake passage adjacent to the second outlet port for deflecting an air-fuel mixture flowing from the secondary intake passage into the combustion chamber to form a swirl of air-fuel mixture in the combustion chamber.

Abstract: A spark plug for igniting air-fuel mixtures, comprising: an elongated annular body with an axial bore; dividing the bore into a valve chamber and a compression chamber; and, a valve disk, slidingly disposed in the valve chamber, the valve disk being subjected to the operating pressure of the cylinder, the valve disk being pressed into a sealing position during compression, ignition and exhaust strokes, and being pulled into an open position during intake strokes, whereby unburned gases enter the combustion chamber during the exhaust strokes and additional air is pulled into the combustion chamber during the intake strokes, the unburned gases and additional air being injected back into the cylinder prior to each ignition to enhance subsequent combustions, the valve disk being substantially immune to damage from the successive shock loading to which it is subjected.

Abstract: A new and unique valve actuating cam shaft driving system for rotating a cam shaft to actuate suction and exhaust valves of an internal combustion engine, which comprises a driving gear on a crankshaft, a shock absorbing gear assembly rotatably mounted on an intermediate shaft and a plurality of power transmission gears, said shock absorbing gear assembly including two gears, one of them meshing with the driving gear while the other one meshing with one of the power transmission gears. The shock absorbing gear assembly has a shock absorbing member incorporated therein for preventing any vibration or shock from being transmitted to the valve actuating cam shaft. Further, one of the power transmission gears which is rotatably mounted on the cam shaft has a shock absorbing member incorporated therein in the same manner as that in the shock absorbing gear assembly.

Abstract: Hydraulic tappet comprising a first and a second body shaped as a socket defining between them a chamber suited to be filled with a fluid coming from a source through an appropriate duct formed in the said socket bodies; along the said duct is arranged a ball for intercepting the fluid under pressure located in a corresponding conical seat formed in the bottom wall of the second socket and forming the outlet of the duct into the said chamber; in the bottom wall is formed an annular groove housing an elastic ring which partially occludes the said conical seat so as to allow a free movement of the ball inside the seat but not the exit of the ball from the seat.

Abstract: An hydraulic lash adjuster is provided with a hollow cylindrical body having a closed bottom at one end thereof and a hollow cylindrical plunger having an apertured bottom at one end thereof slidably disposed within the body to define a reservoir chamber within said plunger and a pressure chamber between the bottom of said cylinder. A spring biased check valve is located within said pressure chamber in operative association with the apertured bottom of said plunger to control the flow of fluid from the reservoir chamber to the pressure chamber. A cup-shaped cap is provided at the outer end of the plunger for engagement with a push rod of a valve mechanism and is provided with a passage communicating the interior of the plunger with the exterior.

Abstract: A getter selected from the group consisting of zirconium, hafnium, yttrium, and mixtures thereof is used as an additive for metal coolants, e.g., sodium, potassium and sodium-potassium alloys, in metal cooled internal combustion engine valves.

Abstract: An oil-containing hydraulic lifter for lash adjustment comprising relatively movable cylinder and plunger members defining a pressure chamber between their closed ends and a reservoir chamber within the plunger. Means are provided for rapid, one-way flow of the oil from the reservoir to the pressure chamber during outward movement of the plunger and for slow, one-way flow from the pressure to the reservoir chamber during inward movement of the plunger. A flexible, bag-shaped diaphragm extending into the reservoir chamber has its open, upper end sealed liquid tightly to the inner wall of the reservoir for sealing in the oil while expanding and collapsing with reciprocation of the plunger. The reservoir chamber has an increased diameter at that part where the diaphragm undergoes most of its expansion and collapse, thereby spacing the inner wall of the reservoir chamber from the diaphragm by a distance great enough to allow full expansion of the diaphragm in the expanding and collapsing operation thereof.

Abstract: An intake passage construction for an internal combustion engine has a primary intake passage for supplying an air-fuel mixture when the engine operates under a full range of loads and a secondary intake passage for supplying an air-fuel mixture when the engine operates under relatively high loads. A secondary slow fuel passage has a pair of fuel supply ports opening into the secondary intake passage, and a fuel drain passageway extends from one of the fuel supply ports and has a fuel discharge port opening into the primary intake passage. Ambient air can be introduced into the fuel drain passageway in response to a vacuum developed in the primary intake passage so that fuel can be drained from the secondary slow fuel passage to prevent vapor lock therein. The fuel discharge port of the fuel drain passageway may open into an induction pipe.

Abstract: A half speed balancer for unbalanced mechanisms such as internal combustion engines comprises an Oldham coupling device with a central coupler that orbits in a curved (usually circular) path at a frequency twice the speed of the coupling rotation. The balancer substitutes for an equivalent rotating eccentric weight when driven at only half the rotational speed thus causing reduced bearing friction and noise and may be used in multiples like eccentric weights to offset various unbalance conditions.

Abstract: An overhead camshaft engine comprises a cylinder head secured to a cylinder block of the engine; a plurality of cam bracket members disposed on the cylinder head to rotatably support a camshaft on the cylinder head; and at least a beam member secured to the cam bracket members to securely connect the cam bracket members with each other, thereby reducing noise emission due to the vibration of the cam bracket members.