Weichai Power Co., Ltd.

Bin Pang

Dehui Tong

Xuguang Tan

Peng Zhou

Xiaoxin Liu

Fei Wang

Haifeng Ren

Yuncheng Gu

Huihui Wang

Xianfa Xu

Wenchao Mo

Lin Chen

Qingzhen Ma

Xu Cheng

In a cylinder deactivation control method of an engine, a cylinder deactivation trigger moment of a to-be-controlled engine is determined; a second cycle and a cylinder deactivation mode corresponding to the next first cycle are determined according to the crankshaft rotation speed at the cylinder deactivation trigger moment, the target torque at the cylinder deactivation trigger moment, and a second cycle and a cylinder deactivation mode corresponding to the previous first cycle at the cylinder deactivation trigger moment; the fuel injection quantity of the ignition cylinder in the next first cycle is determined.

Cylinder deactivation control method and apparatus of engine, and engine

A control method for the combustion system comprises: a fuel injector conducts first primary spray and second primary spray at intervals, and the fuel injector injects fuel to a first arc ridge during the first primary spray; and the fuel injector sprays fuel to a second arc ridge during the second primary spray. By adopting a combustion chamber having two arc ridges and respectively injecting fuel to the two arc ridges by means of the fuel injector, it can be ensured that the amount of fuel shared by each arc ridge is reduced, gathering the fuel at a single arc ridge can be avoided, and it is beneficial to exert the improvement effect of the arc ridge on a wall impact jet flow velocity field at the tail end of a fuel beam, such that the fuel and gas distribution in a cylinder is facilitated.

Control method for combustion system, combustion system and engine

In a cylinder deactivation control method of an engine, a cylinder deactivation trigger moment of a to-be-controlled engine is determined; a second cycle and a cylinder deactivation mode corresponding to the next first cycle are determined according to the crankshaft rotation speed at the cylinder deactivation trigger moment, the target torque at the cylinder deactivation trigger moment, and a second cycle and a cylinder deactivation mode corresponding to the current first cycle at the cylinder deactivation trigger moment; the cylinder pressure type of each cylinder in the current first cycle is determined in conjunction with the cylinder deactivation modes of three adjacent first cycles; the fuel injection quantity of each ignition cylinder in the current first cycle is determined based on the calibrated preset fuel injection quantity chart of the first cycle.

In a control method for the combustion system, spatial intensities of entrainment effects in a cylinder of fuel sprays of the two injections can be superimposed by means of two main fuel injections, two organizations of the fuel sprays for a flow field in the cylinder are implemented; by determining a duration and a first injection pressure of first main fuel injection, a cylinder pressure can at least reach an upper limit threshold of the cylinder pressure; and during second main fuel injection, in a time period when the cylinder pressure drops from the upper limit threshold of the cylinder pressure to a set cylinder pressure, a change rate of the curve slope of a cylinder pressure change curve at each time point is within a set range of slope change rates, and a rotation angle of a crankshaft is not smaller than a first preset rotation angle.

Control method for combustion system, combustion system, and diesel engine

A combustion system may include a piston, a fuel injector, and a cylinder. At a main fuel injection stage, the fuel injector injects a main fuel into the cylinder in sequence to drive the piston to work. A method for controlling the combustion system includes controlling the fuel injector to execute a first-stage main fuel injection in a compression stroke, the first-stage main fuel injection includes at least one injection, and continues till a power stroke such that the cylinder pressure in the cylinder reaches a target pressure peak value; and before the cylinder pressure in the cylinder reaches a descending critical point, executing a second-stage main fuel injection, the second-stage main fuel injection includes at least one injection, and the fuel injected in the second-stage main fuel injection and the fuel injected in the first-stage main fuel injection are superimposed.

Growing community of inventors

Shandong, China

Bin Pang