Method, device and system of compensating torque of turbocharged engine

Abstract

The invention provides a method, a device and a system of compensating the torque of a turbocharged engine. The method of compensating the torque of the turbocharged engine comprises the following steps of judging a working state of a vehicle at the current moment; when the working state of the vehicle at the current moment is in a state of acceleration, inquiring an acceleration target curve of the vehicle, determining the target acceleration of the vehicle at the current moment, and determining the demand torque of the vehicle at the current moment according to the target acceleration; when the output torque of the engine is less than the demand torque at the current moment and the state-of-charge (SOC) threshold of a battery is greater than the SOC threshold of a drive, starting a motor coaxially connected to engine in advance to compensate the torque of the engine; and supplying a power source for the motor through the battery. According to the invention, the motor and the traditional engine are combined, the advantage of rapid response speed of the motor is directly utilized, thus the problem of insufficient power at the start accelerating stage of the turbocharged gasoline engine is fundamentally solved, and the power performance and drivability of the vehicle are greatly improved.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a turbocharged engine torque compensation method, device and system. Background technique [0002] At present, turbocharged engines are widely used in the field of vehicles. A turbocharged engine is essentially adding a turbocharger to the engine. A turbocharger is actually a compressor that increases the intake air volume of the engine per unit of time by compressing fresh air. The working process is: the turbocharger uses the inertial momentum of the exhaust gas discharged from the engine to drive the turbine to rotate at a high speed, and the turbine then drives the coaxial rigidly connected impeller, and the impeller rotates at high speed to press the fresh air coming through the air filter pipe, boosting Then enter the cylinder; the engine speed increases, the turbine speed also increases synchronously, the impeller compresses more air into the cylinder, and the high-pres...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention proposes a turbocharged engine torque compensation method, device and system, aiming at solving the problem of low-speed power shortage of a supercharged gasoline engine

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