| 摘要 |
PURPOSE: A connecting structure between a cylinder head and a cam cap of a DOHC(Double OverHead Camshaft) engine is provided to enhance the processing of an oil feed passage for feeding oil to a camshaft and to improve assembling properties between a cylinder head and a cam cap. CONSTITUTION: Each couple of semicircular holes(16A,16B,18A,18B) are formed at a cylinder head(12) and a cam cap(14) to accept double camshaft. The double camshaft is mounted on the cylinder head, and the cylinder head is connected with the cam cap by connecting bolts(20). Herein, the cam cap is simply assembled by the three bolts without using a dowel pin for fixing the side. The cylinder head has a first oil passage(24) on a connecting face(P1) with the cam cap from an oil hole(22) while the cam cap has a second oil passage(26) to the semicircular hole(18A,18B) from a connecting face(P2) with the cylinder head. Oil is supplied to the oil hole of the cylinder head via a cylinder block from an oil tank under an engine. The oil is fed to the camshaft through the first oil passage, a first bypass pipe(26A), a second bypass pipe(26B), and a third and a fourth bypass pipe(26C,26D) sequentially.
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