公开(公告)号：US12180904B2

公开(公告)日：2024-12-31

申请号：US18290406

申请日：2022-01-21

Applicant: WEICHAI POWER CO., LTD.

Inventor： Xuguang Tan ,  Peng Zhou ,  Dehui Tong ,  Bin Pang ,  Yuncheng Gu ,  Xiaoxin Liu

IPC: F02D35/02 ,  F02D41/40

Abstract: 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.

公开(公告)号：US12134995B2

公开(公告)日：2024-11-05

申请号：US18276926

申请日：2021-12-13

Applicant: WEICHAI POWER CO., LTD

Inventor： Xuguang Tan ,  Dehui Tong ,  Peng Zhou ,  Xiaoxin Liu ,  Bin Pang

IPC: F02D41/40 ,  F02D41/24 ,  F02D41/38

Abstract: 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.

公开(公告)号：US12196151B2

公开(公告)日：2025-01-14

申请号：US18560688

申请日：2022-01-21

Applicant: WEICHAI POWER CO., LTD.

Inventor： Xuguang Tan ,  Bin Pang ,  Dehui Tong ,  Peng Zhou ,  Xiaoxin Liu ,  Yuncheng Gu ,  Xu Cheng

IPC: F02D41/40 ,  F02D41/38

Abstract: 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.

公开(公告)号：US12188423B2

公开(公告)日：2025-01-07

申请号：US18748323

申请日：2024-06-20

Applicant: WEICHAI POWER CO., LTD.

Inventor： Haifeng Ren ,  Fei Wang ,  Bin Pang ,  Qingzhen Ma ,  Huihui Wang ,  Lin Chen ,  Wenchao Mo ,  Xianfa Xu

IPC: F02D41/00 ,  F02D13/06 ,  F02D41/24

Abstract: 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.