Method, device, system and electronic device for detecting crankshaft position of hybrid vehicle

Abstract

The present application provides a method, device, system and electronic equipment for detecting the crankshaft position of a hybrid vehicle, and a method for detecting the crankshaft position of a hybrid vehicle, by monitoring the current speed of the crankshaft in real time after obtaining a power-off command; The first angle information and the first resolver position variable of the motor shaft; then, according to the first angle information of the crankshaft, it is determined that the current resolver cycle of the first resolver position variable is the Nth resolver cycle; The current resolver cycle of the first resolver position variable is used as the start cycle, and the number of resolver cycles after the start cycle starts to be calculated; the second resolver position variable and the current accumulated number of resolver cycles are obtained; The variable position variable, the Nth resolver cycle and the current accumulated number of resolver cycles determine the angle information of the crankshaft when the engine stops rotating. Thereby, the purpose of accurately determining the position of the crankshaft after stopping when the engine is stopped and turned off is achieved.

Description

technical field [0001] The present application relates to the field of computer technology, and in particular, to a method, device, system and electronic device for detecting the position of a crankshaft of a hybrid vehicle. Background technique [0002] At present, when the engine is synchronizing, it is necessary to identify the missing tooth position of the crankshaft and the multi-tooth position of the camshaft, so at least one revolution of the crankshaft is required to synchronize. [0003] Since the frequency and amplitude of the crankshaft speed sensor signal change with the speed, when the engine is about to be shut down, the crankshaft speed decreases. At this time, the frequency and amplitude of the output signal of the crankshaft sensor decrease rapidly, and the speed and position errors are large, so it is impossible to determine the stop The position after the crankshaft is stopped when the engine is turned off. SUMMARY OF THE INVENTION [0004] In view of t...

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Problems solved by technology

[0003] Since the frequency and amplitude of the crankshaft speed sensor signal change with the speed, when the engine is about to shut down, the crankshaft speed decreases, and the frequency and amplitude of the output signal of the crankshaft sensor decrease rapidly at this time, and the speed and position errors are large, so it is impossible to determine the stop Position of the crankshaft after the engine is turned off

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