Abstract:
A number of embodiments of induction system for internal combustion engines employing multiple intake valves. The induction systems are designed so as to provide substantially unrestricted charging and axial flow into the cylinder bore when running under high-speed, high-load conditions. A control valve is provided which changes the effective configuration of the induction passages so as to provide a slant tumble action under lower speed and load conditions. Various arrangements are disclosed for altering the amount of slant action and providing slant actions in opposite or the same direction. In addition, a single control valve element is provided for achieving this effect in a three poppet valve per cylinder engine.
Abstract:
A multicylinder, four-stroke internal-combustion engine is spark-ignited and has three intake valves and one exhaust valve which interact in the combustion chamber with valve openings having valve opening centers. The valve opening centers are situated on both sides of a longitudinal center plane of the internal-combustion engine. The valves are arranged so that a first intake valve and a second intake valve with their valve opening centers are situated on one side of the longitudinal center plane, whereas a third intake valve and the exhaust valve with their valve opening centers are situated on the other side of the longitudinal center plane.
Abstract:
A multiple valve internal combustion engine and specifically a cylinder head and valve operating mechanism therefore. The cylinder head is formed from a two part construction and an arrangement is provided for operating the valves that permits a maximum volume cooling jacket to be formed on the exhaust side of the cylinder head. The camshaft and tappet mechanism for operating the valves is formed in a second cylinder head portion and a port extends through both cylinder head portions for serving the combustion chamber of the cylinder head. Various cam drive arrangement including either gear or chain drives are also disclosed.
Abstract:
An ignition system for a multi-valve internal combustion engine wherein the valves all reciprocate about acute angles to a plane containing the cylinder bore axis and wherein a spark plug is positioned in a generally parallel extending direction to the plane and is offset slightly toward the side of the plane containing the most valves. A spark coil is affixed to the terminal end of the spark plug and is itself offset to the other side of the plane to nest between the two poppet valves and provide a compact, low volume combustion chamber and a compact, low height engine arrangement.
Abstract:
Several embodiments of internal combustion engines having at least five valves, three intake and two exhaust, all operated by a single camshaft. The intake valves are disposed so as to provide a smooth combustion chamber configuration by minimizing the difference in angle between the valves and the valves and rocker arms are arranged so that different degree of lift may be provided. One rocker arm operates one valve and another rocker arm operates two valves with the two valves being operated being differently configured so as to provide the desired different lift. In addition, a staged intake system is included that has a single intake passage that extends perpendicular to a plane containing the cylinder bore axis and serving one intake valve and a siamese intake passage serving the other intake valves. The siamese intake passage has a section that extends also perpendicularly to the plane.
Abstract:
A single overhead cam multi-valve internal combustion engine wherein individual rocker arms operate each of at least three intake valves and two exhaust valves so as to permit adjustment in the lift and timing of the respective valves. A spark plug well is formed in the cylinder head between the exhaust valves to provide accessibility and maintain a compact assembly. Various bearing arrangements are disclosed for journaling the camshafts.
Abstract:
A number of embodiments of multiple valve internal combustion engines embodying a single camshaft for operating all of the multiple valves. The cylinder head is configured in such a way that it is reinforced across the center of the cylinder head by a bridging member and this bridging member can form a bearing surface for a center lobe of the camshaft. The camshaft is offset toward one side of the cylinder head and operates the valves through a plurality of rocker arms. In some embodiment, the rocker arms are journaled on a cam cover upon rocker arm shafts formed with reliefs aligned with openings in the cam cover for passing components such as a spark plug or a fastener for securing the cam cover to the cylinder head. Both single and multiple cylinder embodiments are disclosed.
Abstract:
A valve driving device of an engine under the present invention is provided with a cam shaft for exclusive use of intake for driving intake valves and a cam shaft for exclusive use of exhaust for driving exhaust valves. At least either the intake valve or the exhaust valve is pluralized and a transmitting member is trained between the cam shaft with more valves to drive and an engine output shaft. Gears to mesh with each other are provided on said two cam shafts. Under the above composition, only one pulley on the driven side or only one sprocket is required and therefore compactness of the engine can be realized. Also, rotation of the cam shaft having more valves to drive and large torque fluctuation can be stabilized and reliability of gears can be improved, without reinforcing the gears.
Abstract:
A timing system for controlling, via a single overhead camshaft, three or more valves of an internal combustion engine cylinder, each valve presenting a tappet located between each valve stem and a respective cam on the camshaft. The tappet axes are shifted laterally on alternate opposite sides in relation to the axes of the respective valve stems, so as to define a first predetermined eccentricity between the valve stem axes and the axis of each tappet. Moreover, the axis of each tappet is arranged eccentrically in relation to the rotation axis of the camshaft on the valve stem side, so as to define a second predetermined eccentricity in relation to the camshaft axis.
Abstract:
A number of embodiments of multiple valve internal combustion engines embodying a single camshaft for operating all of the multiple valves. The cylinder head is configured in such a way that it is reinforced across the center of the cylinder head by a bridging member and this bridging member can form a bearing surface for a center lobe of the camshaft. The camshaft is offset toward one side of the cylinder head and operates the valves through a plurality of rocker arms. In some embodiment, the rocker arms are journaled on a cam cover upon rocker arm shafts formed with reliefs aligned with openings in the cam cover for passing components such as a spark plug or a fastener for securing the cam cover to the cylinder head. Both single and multiple cylinder embodiments are disclosed.