A method, apparatus, device, and storage medium for locking diagnosis.

Abstract

This invention discloses a lock-up diagnostic method, apparatus, device, and storage medium. The method includes: acquiring crankshaft signals and camshaft signals; determining an initial crankshaft angle set corresponding to the camshaft based on the crankshaft signals and camshaft signals; determining a first crankshaft angle set corresponding to a first time period and a second crankshaft angle set corresponding to a second time period based on the initial crankshaft angle set; and determining a lock-up diagnostic result based on the first crankshaft angle set and the second crankshaft angle set. Using this method, without adding additional sensors or actuators, the fault can be accurately located to a lock-up function failure of the VVT ​​system by verifying the camshaft and crankshaft angles during startup and stable engine operation, eliminating the influence of other faults such as camshaft installation position and timing belt aging and slippage.

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