Patents Assigned to WEICHAI POWER CO., LTD.
  • Patent number: 12196161
    Abstract: An EGR mixing and adjusting apparatus and an internal combustion engine including the EGR mixing and adjusting apparatus. The EGR mixing and adjusting apparatus includes an EGR tube internally provided with an EGR mixing chamber. An exhaust gas inlet communicating with the EGR mixing chamber is provided at a side wall of the EGR tube. A gas guide sliding block is provided within the EGR tube and slides axially therein to block or open the exhaust gas inlet. The EGR mixing and adjusting apparatus includes a driving device to drive the gas guide sliding block to slide to a predetermined open position. The EGR tube uses the exhaust gas inlet to guide exhaust gas into the EGR mixing chamber and mixes the exhaust gas with fresh air inside the EGR tube. The gas guide sliding block slides axially in the EGR tube to block or open the exhaust gas inlet.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: January 14, 2025
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Yuelan Zhong, Ziyang Dai
  • Patent number: 12196151
    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.
    Type: Grant
    Filed: January 21, 2022
    Date of Patent: January 14, 2025
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Xuguang Tan, Bin Pang, Dehui Tong, Peng Zhou, Xiaoxin Liu, Yuncheng Gu, Xu Cheng
  • Patent number: 12188423
    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.
    Type: Grant
    Filed: June 20, 2024
    Date of Patent: January 7, 2025
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Haifeng Ren, Fei Wang, Bin Pang, Qingzhen Ma, Huihui Wang, Lin Chen, Wenchao Mo, Xianfa Xu
  • Patent number: 12180904
    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.
    Type: Grant
    Filed: January 21, 2022
    Date of Patent: December 31, 2024
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Xuguang Tan, Peng Zhou, Dehui Tong, Bin Pang, Yuncheng Gu, Xiaoxin Liu
  • Publication number: 20240401543
    Abstract: An airway structure, a cylinder cover and a Miller-profile engine are provided. The airway structure includes an intake duct and an intake valve arranged on an intake side, and an exhaust duct and an exhaust side roof arranged on an exhaust side. An angle of an axis of an intake valve stem relative to an assembly bottom surface of the cylinder cover is a1; an angle between a revolution cone surface of an intake valve disc and the axis of the intake valve stem is a2, an angle between a plane where the exhaust side roof is located and the assembly bottom surface is a3, a lower guide surface of the intake duct close to an intake throat is inclined downward at an angle of a4 relative to the assembly bottom surface. The airway structure satisfies: a3?3°?a1-a2?a3+3°; and/or, a4?3°?a1-a2?a4+3°.
    Type: Application
    Filed: June 5, 2024
    Publication date: December 5, 2024
    Applicant: WEICHAI POWER CO., LTD.
    Inventors: Liyu WANG, Wei LI, Yuncheng GU, Shanyong ZHANG, Jianjiao ZHANG
  • Patent number: 12152520
    Abstract: A urea pump, and a control method and control system for the urea pump are described. The urea pump comprises: a liquid intake pipeline; an instant heating type filtering device, an inlet of the instant heating type filtering device being in communication with a urea tank via the liquid intake pipeline, and the instant heating type filtering device being configured to filter and heat a urea solution flowing in through the inlet pipeline; a pressure build-up pump arranged at the inlet pipeline and configured to drive the urea solution flowing to the instant heating filtering device through the liquid intake pipeline; a liquid output line in communication with a first outlet of the instant heating filtering device and configured to deliver a filtered and heated urea solution to a nozzle; and a liquid return pipeline.
    Type: Grant
    Filed: December 29, 2022
    Date of Patent: November 26, 2024
    Assignee: WEICHAI POWER CO., LTD
    Inventors: Lihua An, Weida Liu, Junpu Li, Guopeng Li
  • Patent number: 12145568
    Abstract: A control method is applied to a hybrid power system including an engine and a motor. A motor stator of the motor is connected to a driving shaft of a motor vehicle by means of a transmission mechanism such that, when rotated, the driving shaft drives the motor stator to rotate; the motor is used to determine output torque according to the rotating speed of the motor and transmit same to the driving shaft; the rotating speed of the motor is equal to the difference between the rotating speed of the motor rotor and the rotating speed of the motor stator. The method includes, according to operating parameters of the hybrid power system and operating parameters of the motor vehicle, controlling a motor controller to provide a drive signal to the motor stator such that the operating parameters of the motor meet a first preset formula.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: November 19, 2024
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Fenglong Lv, Lei Zhang, Yamei Xu, Fei Wang, Zhengxing Zhang, Bin Zhang
  • Patent number: 12134995
    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.
    Type: Grant
    Filed: December 13, 2021
    Date of Patent: November 5, 2024
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Xuguang Tan, Dehui Tong, Peng Zhou, Xiaoxin Liu, Bin Pang
  • Patent number: 12109533
    Abstract: A tank cover of a urea tank for an SCR aftertreatment system is provided with an air hole, a gas inlet hole, a gas discharge hole, a first constant pressure check valve and a second constant pressure check valve. The tank cover is mounted at a liquid injection port of a tank body of the urea tank. The air hole is provided in a portion of the tank cover corresponding to the liquid injection port. The gas inlet hole and the gas discharge hole are provided in the portion of the tank cover corresponding to the liquid injection port. An inlet of the first constant pressure check valve is butted with the air outlet hole. An inlet of the second constant pressure check valve is butted with the air inlet hole.
    Type: Grant
    Filed: September 29, 2018
    Date of Patent: October 8, 2024
    Assignees: WEICHAI POWER CO., LTD., WEICHAI POWER EMISSION SOLUTIONS TECHNOLOGY CO., LTD.
    Inventors: Rui Wang, Jia Yu
  • Patent number: 12104510
    Abstract: A method for detecting a urea consumption deviation including: calculating a pump pressure correction factor fac; calculating a urea consumption deviation factor A when the pump pressure correction factor fac is within a calibrated range; calculating the urea consumption deviation factor A multiple times, and calculating an average value of A; and comparing the average value of the urea consumption deviation factor A with a calibrated limiting value range, so as to determine whether there is a great deviation between an actual urea consumption value and a theoretical urea consumption value, the calculating the pump pressure correction factor fac comprises: adjusting a pressure of a urea pump to P1; adjusting the pressure of the urea pump to P2, where P2 is smaller than P1; recording a time T1 during which the pressure of the urea pump is adjusted from P1 to P2; and calculating fac=T1/(P1?P2).
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: October 1, 2024
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Jinjin Hu, Xianfeng Ren, Yupeng Wang, Libing Yan, Dong Qiu
  • Patent number: 12085039
    Abstract: Provided are a composite coating, a piston, an engine, and a vehicle. The composite coating comprises a metal bonding layer, a transition layer, a ceramic layer, and a sealing layer which are sequentially laminated, wherein the metal bonding layer is configured to be bonded with a piston basic body, the metal bonding layer is a rare earth metal modified bonding layer, and the transition layer is a rare earth metal modified zirconia layer.
    Type: Grant
    Filed: March 30, 2022
    Date of Patent: September 10, 2024
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Fei Ma, Ninglu Wang, Lingyan Guo, Shanhong Wan, Guolong Huang, Qiangzhen Zang
  • Publication number: 20240254939
    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.
    Type: Application
    Filed: January 21, 2022
    Publication date: August 1, 2024
    Applicant: WEICHAI POWER CO., LTD.
    Inventors: Xuguang TAN, Bin PANG, Dehui TONG, Peng ZHOU, Xiaoxin LIU, Yuncheng GU, Xu CHENG
  • Patent number: 11982341
    Abstract: A hydrostatic transmission mechanism of the power split transmission system is in driving connection to the sun gear of the first planetary gear train and the sun gear of the second planetary gear train. The planetary carrier of the first planetary gear train is connected to the planetary carrier of the second planetary gear train. The planetary carrier of the first planetary gear train is connected to the sun gear of a third planetary gear train. The driving plate of a third clutch is in transmission connection to the gear ring of the third planetary gear train. The driving plate of a fourth clutch is in transmission connection to the sun gear of the third planetary gear train. Each of the driven plate of the third clutch and the driven plate of the fourth clutch is connected to an output main shaft.
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: May 14, 2024
    Assignees: WEICHAI POWER CO., LTD, LINDE HYDRAULICS (CHINA) CO., LTD.
    Inventors: Dongkun Wang, Minghui Zhou, Bin Qi, Yan Chen
  • Patent number: 11919399
    Abstract: A hybrid power system includes an engine and a motor. A motor stator of the motor is connected with a drive shaft of a motor vehicle through a transmission mechanism, so that the motor stator can also rotate relative to the chassis and other structures of the motor vehicle, thus, the hybrid power system composed of the engine and the motor can meet the application of various working conditions such as starting, idling, forwarding and reversing of the motor vehicle, and the number of parts of the hybrid system is greatly reduced, thereby simplifying the overall structure of the hybrid power system.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: March 5, 2024
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Fenglong Lv, Lei Zhang, Yamei Xu, Fei Wang, Zhengxing Zhang, Bin Zhang
  • Patent number: 11898487
    Abstract: The present invention belongs to the technical field of diesel engines, and particularly relates to an engine cooling system and a cooling method therefor. In the engine cooling system of the present invention, when an engine needs to be warmed up, a first valve is opened, a lower engine body water storage chamber is in communication with an upper engine body water storage chamber, and some of the cooling water directly flows into the lower engine body water storage chamber from the upper engine body water storage chamber. The flow of the cooling water entering an engine body is reduced, and under the condition that heat dissipated by the engine is unchanged, the temperature rise of the cooling water flowing through the engine body such as a cylinder sleeve upper cooling water chamber and a cylinder sleeve lower water jacket is faster, such that an engine warming effect is improved.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: February 13, 2024
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Xiaolei Fu, Chao Rong, Xia Wang, Jianqiang Wei
  • Patent number: 11891924
    Abstract: A rocker arm mechanism includes a rocker arm shaft, a rocker arm, a valve clearance adjuster, a valve train, and a control valve. The rocker arm is rotatably disposed on the rocker arm shaft. The valve train includes a valve bridge. The rocker arm is provided with a plunger chamber. The valve clearance adjuster includes a hydraulic tappet slidably disposed in the plunger chamber. The plunger chamber is supplied with oil through an oil supply passage. The control valve is configured to open or close the oil supply passage. When the control valve opens the oil supply passage, the hydraulic tappet can abut against the valve bridge and eliminate the clearance between the valve bridge and the hydraulic tappet.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: February 6, 2024
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Shenggang Guo, Fei Wang, Cheng Xu
  • Publication number: 20230392539
    Abstract: The present invention belongs to the technical field of diesel engines, and particularly relates to an engine cooling system and a cooling method therefor. In the engine cooling system of the present invention, when an engine needs to be warmed up, a first valve is opened, a lower engine body water storage chamber is in communication with an upper engine body water storage chamber, and some of the cooling water directly flows into the lower engine body water storage chamber from the upper engine body water storage chamber. The flow of the cooling water entering an engine body is reduced, and under the condition that heat dissipated by the engine is unchanged, the temperature rise of the cooling water flowing through the engine body such as a cylinder sleeve upper cooling water chamber and a cylinder sleeve lower water jacket is faster, such that an engine warming effect is improved.
    Type: Application
    Filed: November 24, 2020
    Publication date: December 7, 2023
    Applicant: WEICHAI POWER CO., LTD.
    Inventors: Xiaolei FU, Chao RONG, Xia WANG, Jianqiang WEI
  • Patent number: 11817604
    Abstract: The invention relates to a device (1) having at least one fuel cell (2) and a DC/DC converter (3) assigned to the latter. A variable voltage generated in the fuel cell (2) is converted, by means of the DC/DC converter (3), into a DC voltage for a system (4) to be supplied. The DC/DC converter (3) is designed to capture internal characteristic variables of the fuel cell (2). Operating states of the fuel cell (2) are captured and/or controlled in dependence on these characteristic variables.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: November 14, 2023
    Assignee: WEICHAI POWER CO., LTD.
    Inventors: Wenmiao Chen, Yupeng Wang, Thomas Vetter, Ji Zhang
  • Publication number: 20230349312
    Abstract: The present invention belongs to the technical field of vehicle detection, and in particular relates to a method for detecting a urea consumption deviation, and a vehicle post-processing system. The method for detecting a urea consumption deviation in the present invention comprises the following steps: calculating a pump pressure correction factor fac; calculating a urea consumption deviation factor A, totaling the number of calculations, and calculating urea consumption deviation factors A multiple times; and calculating an average value of A, and comparing the average value of the urea consumption deviation factors A with a calibrated limiting value range, so as to determine whether there is a great deviation between an actual urea consumption value and a theoretical urea consumption value.
    Type: Application
    Filed: December 31, 2019
    Publication date: November 2, 2023
    Applicant: WEICHAI POWER CO., LTD.
    Inventors: Jinjin HU, Xianfeng REN, Yupeng WANG, Libing YAN, Dong QIU
  • Patent number: 11761853
    Abstract: An engine piston is provided. A first sealing structure, including a first sealing rubber ring and a first annular groove, is provided at a head of the engine piston. The first sealing rubber ring has a U-shaped section with a reserved space at the top of the first sealing rubber ring, and a gap for circulating hydraulic oil is provided between a ring bank, above the first sealing rubber ring, of the engine piston and a simulated cylinder liner of a fatigue testing apparatus for an engine piston. In a case that the hydraulic oil is introduced into the fatigue testing apparatus for the engine piston to simulate pressure loading under a high-explosion pressure, when the hydraulic oil enters into the reserved space from the gap for circulating the hydraulic oil, an inner wall of the reserved space is squeezed and the first sealing rubber ring is deformed.
    Type: Grant
    Filed: July 6, 2022
    Date of Patent: September 19, 2023
    Assignees: Weichai Power Co., LTD., Weichai Heavy Machinery Co., LTD
    Inventors: Haijun Liu, Ninglu Wang, Fei Ma, Baoyu Liu, Lei Li