Rotation speed communication strategy for hybrid power engine

Abstract

The invention discloses a rotation speed communication strategy for a hybrid power engine. The rotation speed communication strategy is matched with an engine electronic control unit (ECU) to be used,and a rotation speed signal of the engine is transmitted to a hybrid power system controller. The rotation speed communication strategy comprises the steps of setting of a rotation speed change rate,detection of a rotation speed signal, contrast selection, indirect transmission and the like. An engine rotation speed filtering function is added, and the signal interference phenomenon is eliminated. The rotation speed communication strategy has the following advantages that (1) the engine rotation speed signal obtained through the filtering function can provide an accurate engine rotation speed signal for the hybrid power system controller, thus gear shifting of a gearbox is smooth, and the driving comfort of the whole vehicle is improved; and (2) gas consumption is lowered, and transientresponsiveness of the whole vehicle is improved; a torque request sent by the hybrid power system controller and the actual torque provided by the engine are synchronous through the accurate rotationspeed signal, thus the engine is in the optimal operating point, gas consumption is lowered, and transient responsiveness of the whole vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of engine control, in particular to a hybrid engine speed communication strategy. Background technique [0002] At present, the hybrid power engine used in the domestic market uses the hybrid power system controller to complete the speed communication and control. The way for the hybrid system controller to obtain the engine speed signal is: first, the engine ECU reads the engine speed through the speed sensor signal, and then sends it to the CAN bus through the CAN line connected to the engine ECU and the vehicle, and the hybrid system controller receives the engine speed signal. After the signal, perform the corresponding action. Due to the large number of vehicle lines, signal interference is common in the process of the engine sending the speed signal through the CAN line of the vehicle, resulting in fluctuations and jumps in the speed signal output by the engine, and the hybrid system controller receiv...

AI Technical Summary

Problems solved by technology

[0003] (1) The wrong engine speed signal causes abnormal fluctuations in the vehicle speed, which reduces the driving comfort of the vehicle;

[0004] (2) The wrong engine speed signal causes the torque request issued by the hybrid control system to be out of sync with the actual torque provided by the engine, causing the vehicle to pant and even damage the engine

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