| 摘要 |
A device for detecting the cam top position in an in-line type high pressure pump, with which time required to detect rotation position of the cam top position can be decreased in engine starting operation, thereby time for starting engine can be decreased. A cam for driving a plunger has a plurality of cam lobes, a plurality of cam top position pointers are attached to the outer periphery of the camshaft or to the outer periphery of a flywheel connected to the camshaft such that each of the pointers corresponds to each of the cam lobes of said cam in the number and angle phase respectively, and a cam top position detector is located to face the pointers when the camshaft rotates so that the pointers are detected by the detector.
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