| 摘要 |
A method of testing the assembled state of an internal combustion engine and quickly and accurately judging whether there is at least one fault with the assembling of the engine. While an exhaust-valve side space is closed and a crank shaft is rotated at a constant speed, the pressure in the exhaust-valve side space and the pressure in a surge tank are detected by pressure sensors, respectively. The assembled state of an engine is tested based on the predetermined conditions of the detected two pressures. Those predetermined conditions may be the crank-shaft angles when the two pressures take respective maximal values, the crank-shaft angles when the two pressures change from their constant states to their increasing or decreasing states, etc. Based on those values, incorrect phases of crank and cam pulleys, incorrect clearances of intake and exhaust valves, missing of a compression ring, etc. can be identified.
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