Reverse rotation preventing mechanism for diesel engine
AssigneeYanmar Co., Ltd.
InventorsKatsuyuki Shiota, Yasuhiro Kanazu, Satoshi Hattori
Life of this patent
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Abstract
The invention prevents reverse rotation of a diesel engine which is possible to occur when the engine is started. A camshaft 13 is driven by a crankshaft 5 through power transmission means, and cams 14, 21 and 22 are provided on camshaft 13 so as to drive a fuel injection pump 12, an intake valve and an exhaust valve, respectively. In fuel injection pump cam 14, middle stage portion 53 is radially larger than minimum radius portion 51 and is disposed at a predetermined angle R3 on the back side in the rotation direction of the fuel injection pump cam from maximum radius portion 52.
Claims7
A reverse rotation preventing mechanism for a diesel engine comprising:
- a camshaft driven by a crankshaft through power transmission means;
- an intake cam provided on the camshaft so as to drive an intake valve;
- an exhaust cam provided on the camshaft so as to drive an exhaust valve;
- and
- a single fuel injection pump cam provided on the camshaft so as to drive a fuel injection pump, wherein the single fuel injection pump cam is shaped so as to include a rotatably integral maximum radius portion, minimum radius portion, and middle stage portion, and wherein the middle stage portion is radially larger than the minimum radius portion and is disposed in a predetermined angle range on the back side in the rotation direction of the single fuel injection pump cam from the maximum radius portion.
Dependencies are inferred from the claim text.