Control method and system of electronic supercharger, and vehicle

Abstract

The invention provides a control method and system of an electronic supercharger, and a vehicle. The method comprises the following steps of: when the start-up conditions of the electronic supercharger are met, determining the required torque of an engine according to the opening degree of an accelerator pedal and the rotating speed of the engine; obtaining required air intake quantity of the engine according to the required torque; obtaining required air intake pressure according to the required air intake quantity and air intake temperature; calculating air intake pressure difference between the required air intake pressure and actual air intake pressure; obtaining the estimated rotating speed of the electronic supercharger according to the air intake pressure difference and the rotating speed of the engine; performing PID control according to the air intake pressure difference to obtain PID regulated rotating speed; and correcting the estimated rotating speed of the electronic supercharger according to the PID regulated rotating speed to obtain the final output rotating speed of the electronic supercharger. Through the adoption of the method disclosed by the invention, the acceleration property of the vehicle can be effectively improved, and further driving experience is enhanced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a control method, system and vehicle of an electronic supercharger. Background technique [0002] At present, the engine of the vehicle is supercharged by means of a turbocharger, which can improve the acceleration performance of the vehicle to a certain extent. However, when the vehicle is accelerating, the turbocharger needs to use the high-temperature and high-pressure exhaust gas from the engine to drive the turbocharger. Turbo, which in turn supercharges the engine. But this requires a process, for example: when the vehicle is accelerating rapidly, the exhaust energy of the engine in the initial stage of rapid acceleration is not enough in several working cycles to effectively drive the turbocharger to reach the expected speed, resulting in acceleration hysteresis, affecting Accelerate performance. Contents of the invention [0003] In view of this, the present inven...

AI Technical Summary

Problems solved by technology

But this requires a process, for example: when the vehicle is accelerating rapidly, the exhaust energy of the engine in the initial stage of rapid acceleration is not enough in several working cycles to effectively drive the turbocharger to reach the expected speed, resulting in acceleration hysteresis, affecting Acceleration performance

Images