FIELD: engines and pumps.
SUBSTANCE: invention relates to testing ICE valve timing gear. Proposed method comprises decompressing engine cylinders, cranking engine crankshaft, registering crankshaft angular speed variation, defining amplitudes and phases of crankshaft angular acceleration extremums. Deviation from the latter is used to decide on the state of valve timing gear. Crankshaft is cranked in idling at preset rpm. Cranking is carried by one operating cylinder with other cylinders being decompressed. Angular speed variation is registered within complete kinematic cycle for periods corresponding to expansion strokes in decompressed cylinders.
EFFECT: ruled out extra errors in measurements.
3 dwg
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