| 摘要 |
PURPOSE:To reduce the occurrence of a cam rotation angle reference position error due to the regulation error of a plunger lift, by a method wherein a cam rotation angle is measured in a cam lift high speed region by means of the plunger lift, and is set in a cam rotation angle reference position based on crank angle reference position. CONSTITUTION:A timing mark 28 on the crank pulley 25 side or a timing mark 29 on the engine body side, by means of which an engine crank angle reference position is determined, is set so that a plunger lift regulation reference (cam rotation reference position) can be set in a region where a change in a cam lift (plunger lift) based on a cam rotation angle is increased, except a camlift low speed region. After setting is made in the engine crank angle reference position by mating the timing marks 28 and 29 with each other, lift characteristics of a plunger 6 is measured by means of a dial gauge 31, regulation is made so that a lift amount is adjusted to a given value, and a given cam rotation reference position = a fuel injection timing is provided.
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