Engine intake control method of hybrid power vehicle

Abstract

The invention discloses an engine intake control method of a hybrid power vehicle. A hybrid power control unit receives a pedal signal input by a driver and outputs a target torque value of an engineto an intake control module; the intake control module compares the target torque value and the size of a control strategy switch threshold, and sets control parameters of a throttle valve and a bypass valve; and a torque estimation module acquires an operating state parameter of the engine, calculates an estimation torque value, and feeds back to the hybrid power control unit and the intake control module. Through the engine intake control method provided by the invention, the engine can quickly respond and meets the requirement on a torque following performance of the hybrid power control unit, in addition, in the transient process, the engine intake amount fluctuation is small, and the torque output is stable.

Description

technical field [0001] The invention relates to the technical field of electronic control of automobiles, and in particular relates to an engine air intake control method of a hybrid electric vehicle. Background technique [0002] Current hybrid vehicles include at least two power sources, one is an internal combustion engine and the other is a vehicle battery; and hybrid vehicles have at least four operating modes: pure electric drive, pure gasoline drive, driving charging and hybrid drive mode. Hybrid vehicles are more prone to torque fluctuations during mode switching, and have higher requirements for engine torque output followability and smoothness than traditional fuel vehicles. The control parameters that affect the intake air volume of the engine are mainly: throttle opening, boost pressure, intake and exhaust valve opening and closing timing, and EGR valve (Exhaust Gas Recirculation, exhaust gas recirculation valve) opening. The common technical route is: Turbochar...

AI Technical Summary

Problems solved by technology

The control parameters that affect the intake air volume of the engine are mainly: throttle opening, boost pressure, intake and exhaust valve opening and closing timing, and EGR valve (Exhaust Gas Recirculation, exhaust gas recirculation valve) opening. The common technical route is: Turbocharging + Miller / Atkinson cycle + EGR valve control, and the combination of different control parameters can bring the same intake air volume, which brings greater difficulty to the precise intake air control of the engine

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