Valve driving means for V-type engine of vehicle
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsKazuo Uchiyama, Takamitsu Suzuki
Life of this patent
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Abstract
A driving arrangement for a motor vehicle having a transversely disposed V-type four camshaft internal combustion engine. The camshafts are all driven in timed relationship with the crankshaft with a first flexible transmitter being operative to drive the intake camshafts of each cylinder bank at the same end of the engine from the crankshaft. The exhaust camshafts of each bank are driven by the intake camshafts at the opposite end of the engine.
Claims47
A camshaft drive for an internal combustion engine comprising at least one cylinder, first and second camshafts supported for rotation about parallel and offset axes, an output shaft, first timing drive means for driving said first camshaft directly from said output shaft on one side of said one cylinder, and second timing drive means for driving said second camshaft from said first camshaft on the other side of said one cylinder.
An internal combustion engine having a crankcase, a crankshaft journaled in said crankcase, a pair of angularly disposed cylinders extending from said crankcase and forming combustion chambers at the ends spaced from said crankcase, a first camshaft supported for rotation about an axis parallel to said crankshaft axis and associated with the combustion chamber of one of said cylinders, a second camshaft supported for rotation about an axis parallel to said crankshaft axis and said first camshaft axis and associated with the combustion chamber of the other of said cylinders, first timing means for driving said first camshaft in timed relationship with said crankshaft at one end of said first camshaft, and second timing means for driving said second camshaft in timed relationship with said crankshaft at the other end of said first camshaft.
A camshaft drive for an internal combustion engine comprising angularly related cylinder banks each of which has a respective cylinder head, first and second camshafts supported for rotation about parallel and offset axes by each of said cylinder heads, an engine driven shaft, said first camshafts of said cylinder heads being located at a closer distance to each other than said second camshafts first timing drive means for driving both of said first camshafts directly from said driven shaft, and a pair of second timing drive means, each of said pair driving the second camshaft from the first camshaft of the respective cylinder head.
A camshaft drive for an internal combustion engine comprising first and second camshafts supported for rotation about parallel and offset axes defining a plane disposed at an angle to a vertical plane, an engine driven shaft rotating about an axis lying within said vertical plane, said first camshaft being located at a closer distance to said vertical plane than said second camshaft, first timing means for driving said first camshaft directly from said driven shaft, said first timing drive means being located at one end of the engine and second timing drive means for driving said second camshaft from said first camshaft, said second timing drive means being located at the opposite end of the engine from said first timing drive means.
An internal combustion engine having a cylinder block defining a pair of angularly related cylinder banks each driving a common crankshaft rotatably journalled within a crankcase chamber formed at the base of said cylinder block, a pair of cylinder heads each enclosing a respective one of said cylinder banks and affixed to said cylinder block, a first pair of camshafts each rotatably journalled for rotation about axes parallel to each other and said crankshaft and offset from each other and said crankshaft by a respective one of said cylinder heads at one side thereof and for operating respective valves of a first series of valves in each of said cylinder heads, a second pair of camshafts each rotatably journalled about axes parallel to each other and said crankshaft and offset from each other, said crankshaft and the rotational axes of said first pair of camshafts by a respective one of said cylinder heads at another side thereof for operating a second series of valves therein, a single, first flexible transmitter directly driving each of said first pair of camshafts directly from and in timed relation to said crankshaft at one end of said engine, and a pair of second flexible transmitters at least one of which is disposed at a point spaced from said one end of said engine and separated from said first flexible transmitter by at least one cylinder of one bank of cylinders, each of said second flexible transmitters driving one of the second pair of camshafts from and in timed relation to one of the first pair of camshafts of the respective cylinder head.
Dependencies are inferred from the claim text.