Fuel consumption control method for considering emission of hybrid vehicle

Abstract

The invention provides a fuel consumption control method for considering emission of a hybrid vehicle. The control method comprises at least the steps: calculating the target regeneration rate of a catalytic particle catcher according to the carbon deposition amount; calculating the relative specific fuel consumption of the candidate working points in the target output power range of an engine according to the specific fuel consumption of the engine, the influence factors of carbon deposition, the influence factors of battery charging and discharging power and the universal characteristic diagram of tail gas emission; calculating the target torque and target rotating speed of the engine according to the relative specific fuel consumption; sending the target torque of the engine to an engine controller to execute a driving command; calculating the target torque of a motor according to the target rotating speed of the engine, the target output torque of the whole vehicle and the actual torque of the engine fed back by the engine controller; and sending the target torque of the motor to a motor controller to execute a driving command. According to the control method, the carbon deposition amount in a particle catcher or the catalytic particle catcher is reduced while the energy conversion loss is reasonably controlled.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicles, and in particular relates to a method for controlling fuel consumption of hybrid electric vehicles while taking emissions into account. Background technique [0002] For hybrid vehicles, the most notable feature is that the engine starts and stops frequently. Under low-load conditions, the engine will turn off and the vehicle will enter pure electric mode. Unlike traditional vehicles, the engine will not turn off even when it is idling. Therefore, for diesel hybrid vehicles, if the engine cannot be turned off due to the regeneration of carbon deposits, and the post-injection fuel is added, the deterioration of fuel consumption will be more obvious. Therefore, if the timing and rate of passive regeneration of carbon deposits can be purposely increased during driving, and the amount of carbon deposits can be controlled within a reasonable range, so as to avoid active regeneration o...

AI Technical Summary

Problems solved by technology

Therefore, for diesel hybrid vehicles, if the engine cannot be turned off due to the regeneration of carbon deposits, and the post-injection fuel is added, the deterioration of fuel consumption will be more obvious

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