Energy control method and device for WLTC circulation cold start stage

Abstract

The invention provides an energy control method and device for a WLTC cycle cold start stage, and the method comprises the steps: starting an engine, and judging whether a motor system meets the triggering condition of active power generation or not; if yes, an SOC correction factor and the maximum working torque allowed by the power generation system at the current rotating speed are obtained; calculating the product of the SOC correction factor and the maximum working torque allowed by the motor system at the current rotating speed, and taking the product as the current motor torque of the motor system; the motor system is controlled to operate based on the current motor torque, so that the engine outputs total power; judging whether the motor system meets an active power generation quit condition or not, if yes, quitting active power generation, and enabling the engine to maintain the current total output power; and in the continuous operation process of the engine, when the engine is in the idling working condition, the motor system is controlled to be shut down, the engine is shut down, and the aftertreatment system is in the heat preservation state. Energy control is carried out through the method, oil consumption can be reduced, and pollutant emission can be reduced.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an energy control method and device in the cold start phase of a WLTC cycle. Background technique [0002] Studies have shown that the pollutants emitted in the cold start phase of the WLTC cycle account for more than 70% of the total pollutant emissions in the entire cycle. Therefore, the emission control in the cold start phase is particularly critical. [0003] In the existing technology, the problem of high exhaust pollutants in the cold start stage is mainly solved by adjusting the fuel injection advance angle of the diesel engine, the ignition advance angle of the gasoline engine and the gas engine, and using the intake throttle valve or the exhaust throttle valve together. . However, adjusting the fuel injection advance angle of the diesel engine, the ignition advance angle of the gasoline engine and the gas engine changes the combustion process, making the combustion inc...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiments of the present invention provide an energy control method and device in the cold start stage of the WLTC cycle to solve the problems of incomplete combustion, high fuel consumption rate, and increased exhaust pollutants such as HC and CO in the prior art.

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