Timing synchronization method for forward/reverse-rotation engine

• Main Authors: ZUO ZHE, CUI TAO, ZHENG PAI, XIE JUN, ZHAO ZHENFENG, WANG HANZHENG, ZHANG FUJUN
• Format: Patent
• Language: Chinese; English
• Published: 24.10.2017
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; LIGHTING; MECHANICAL ENGINEERING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; WEAPONS

The invention discloses a timing synchronization method for a forward/reverse-rotation engine. The timing synchronization method comprises the following steps: (1) carrying out clockwise or anticlockwise coding on each tooth in a sparse-dense tooth disc of the engine to obtain a tooth coding rule of the sparse-dense tooth disc during forward/reverse rotation; (2) acquiring a tooth signal of the sparse-dense tooth disc during rotation through a crankshaft signal sensor, processing the acquired signal to a square-wave signal and then inputting the square-wave signal to an ECU, then carrying out logical analysis to obtain a tooth coding rule of the sparse-dense tooth disc, and judging a rotation state of the sparse-dense tooth disc through comparison with the tooth coding rule during the forward/reverse rotation in the step (1); and (3) determining a timing reference tooth of the sparse-dense tooth disc during the forward/reverse rotation on the basis of judging that the sparse-dense tooth disc is during forward