Torque control method and torque control system of non-uniform acting engine

Abstract

The invention belongs to the technical field of engine torque control, and discloses a torque control method and a torque control system of a non-uniform acting engine, comprising the following steps: S1, acquiring engine torque control information; s2, according to the engine torque control information, the corrected engine target indication torque is calculated; s3, according to the engine torque control information and the corrected engine target indication torque, the sum of the fuel injection quantity of each cycle when all the air cylinders work is calculated; s4, according to the engine torque control information and the total fuel injection quantity of each cycle, the total fuel injection quantity of each cylinder in a single cycle is calculated; and S5, according to the engine torque control information and the single-cycle total fuel injection quantity, the injection sequence of each cylinder, the fuel injection advance angle and the fuel injection quantity of each time, the single-cycle target air inlet flow and the target rail pressure are calculated. According to the torque control method of the non-uniform acting engine, the influence of the non-uniform acting working condition on the output torque is considered, and the sound vibration roughness is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of engine torque control, in particular to a torque control method and a torque control system for an engine with non-uniform work. Background technique [0002] In order to meet the increasingly stringent emission regulations around the world, manufacturers usually install more complex after-treatment systems and air intake systems on internal combustion engines, but the above measures will inevitably lead to an increase in fuel consumption. In order to solve the above-mentioned predicament, many manufacturers have added devices such as variable intake valves and cylinder deactivation mechanisms on internal combustion engines to realize cylinder deactivation operations of cylinders under small and medium loads of internal combustion engines. Proper cylinder deactivation operation can reduce the pumping loss of the engine, improve the combustion efficiency, and increase the exhaust temperature of the engine,...

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Problems solved by technology

[0003]However, the current methods involving non-uniform work engine torque control mainly have the following problems: First, the frictional pumping loss torque and combustion efficiency caused by cylinder deactivation cannot be fully considered , ignition fraction and other changes on the output torque; second, the contradiction between NVH and non-uniform work cannot be effectively resolved; third, the proposed control method cannot be fully applied to compression ignition engine torque control

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