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1. 发明申请

US20210156341A1 PRESSURE STABILIZER, A GAS ENGINE SYSTEM AND A GAS PRESSURE CONTROL METHOD 有权
公开(公告)号：US20210156341A1
公开(公告)日：2021-05-27
申请号：US17003144
申请日：2020-08-26
申请人： Weichai Power Co., Ltd.
发明人： Xuguang TAN , Wang LI
IPC分类号： F02M21/02 , F02D19/02
摘要： The present disclosure relates to a pressure stabilizer, a gas engine system and a gas pressure control method. The pressure stabilizer includes: a housing, which comprises a gas intake chamber and a piston chamber, wherein a spacer is provided between the gas intake chamber and the piston chamber, and the spacer is provided with a spacer through hole; a piston, which is slidably disposed in the piston chamber and which is provided therein with a piston through hole passing through the piston; a spring disposed in the piston chamber, wherein the spring is disposed between the piston and the spacer; a gas outlet end cap, which is disposed at an open end of the piston chamber and which is provided with a gas outlet; and an electromagnetic coil, which is disposed at an end of the gas outlet end cap that is close to the piston, wherein the electromagnetic coil generates a magnetic field force for attracting the piston in an energized state, so as to attract the piston to approach the gas outlet end cap.

2. 发明公开

US20240360798A1 CONTROL METHOD FOR COMBUSTION SYSTEM, COMBUSTION SYSTEM, AND DIESEL ENGINE 审中-公开
公开(公告)号：US20240360798A1
公开(公告)日：2024-10-31
申请号：US18290406
申请日：2022-01-21
申请人： WEICHAI POWER CO., LTD.
发明人： Xuguang TAN , Peng ZHOU , Dehui TONG , Bin PANG , Yuncheng GU , Xiaoxin LIU
IPC分类号： F02D35/02 , F02D41/40
CPC分类号： F02D35/023 , F02D35/028 , F02D41/40 , F02D2200/0602
摘要： 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.

3. 发明申请

US20210355891A1 Cylinder Head and Gas Engine 有权
公开(公告)号：US20210355891A1
公开(公告)日：2021-11-18
申请号：US17220874
申请日：2021-04-01
申请人： WEICHAI POWER CO., LTD.
发明人： Xuguang TAN , Dehui TONG , Shun LV , Wei LI , Shaodong ZHANG , Xiaolei FU
IPC分类号： F02F1/42
摘要： A cylinder head includes an intake throat and an intake duct, a valve seat ring is provided in an inner ring of the intake throat; a section of the intake duct is a tumble generating duct; and an extending direction of the tumble generating duct is oblique relative to the cylinder head bottom surface, the lower side surface of the tumble generating duct is a tumble guide surface, the lower end of which forms a tumble generating sharp angle, and the projection of the tumble generating sharp angle on the upper end circular surface of the valve seat ring is a sharp angle projection, the sharp angle projection is a protruding area protruding from the edge of the upper end circular surface of the valve seat ring, and the width of the middle part of the sharp angle projection is larger than the width of both ends thereof.

4. 发明申请

US20200370482A1 PRESSURE COUPLED CONTROL METHOD AND SYSTEM FOR DIFFUSION COMBUSTION OF NATURAL GAS ENGINE 审中-公开
公开(公告)号：US20200370482A1
公开(公告)日：2020-11-26
申请号：US16992522
申请日：2020-08-13
申请人： Weichai Power Co., Ltd.
发明人： Xuguang TAN , Dongchao SU , Junyin LI , Shitong LIU
IPC分类号： F02D19/08 , F02D41/38
摘要： The present invention relates to a pressure coupled control method and system for diffusion combustion of a natural gas engine, the method comprising: S11: detecting an operating condition of a natural gas engine; S12: an electronic control unit calculating a target diesel fuel pressure value flowing into a fuel rail of the natural gas engine according to the operating condition, and detecting an actual diesel fuel pressure value flowing into the fuel rail by means of a diesel pressure sensor in the fuel rail; S13: the electronic control unit calculating a target natural gas pressure value flowing into a gas rail of the natural gas engine according to the actual diesel fuel pressure value, and regulating a natural gas flowing into the gas rail by means of a signal of a gas rail pressure sensor in the gas rail; S14: after the target diesel fuel pressure value and the target natural gas pressure value are established, successively injecting high pressure diesel fuel and a high pressure natural gas into a gas cylinder; S15: detecting in real time a real-time operating condition of the natural gas engine, and promptly regulating the target diesel fuel pressure value and the target natural gas pressure value according to the real-time operating condition. The present invention improves diffusion combustion efficiency by means of the pressure coupled control of diesel fuel and natural gas.

5. 发明公开

US20240254939A1 CONTROL METHOD FOR COMBUSTION SYSTEM, COMBUSTION SYSTEM AND ENGINE 审中-公开
公开(公告)号：US20240254939A1
公开(公告)日：2024-08-01
申请号：US18560688
申请日：2022-01-21
申请人： WEICHAI POWER CO., LTD.
发明人： Xuguang TAN , Bin PANG , Dehui TONG , Peng ZHOU , Xiaoxin LIU , Yuncheng GU , Xu CHENG
IPC分类号： F02D41/40 , F02D41/38
CPC分类号： F02D41/402 , F02D2041/389
摘要： 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.

6. 发明公开

US20240117780A1 METHOD FOR CONTROLLING COMBUSTION SYSTEM, COMBUSTION SYSTEM, AND INTERNAL COMBUSTION ENGINE 审中-公开
公开(公告)号：US20240117780A1
公开(公告)日：2024-04-11
申请号：US18276926
申请日：2021-12-13
申请人： WEICHAI POWER CO., LTD
发明人： Xuguang TAN , Dehui TONG , Peng ZHOU , Xiaoxin LIU , Bin PANG
IPC分类号： F02D41/40 , F02D41/24 , F02D41/38
CPC分类号： F02D41/402 , F02D41/2432 , F02D41/2467 , F02D41/3836 , F02D2041/389 , F02D2200/024
摘要： 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.

7. 发明申请

US20210156345A1 GAS MIXING DEVICE AND A NATURAL GAS ENGINE 有权
公开(公告)号：US20210156345A1
公开(公告)日：2021-05-27
申请号：US17003537
申请日：2020-08-26
申请人： Weichai Power Co., Ltd.
发明人： Xuguang TAN , Dehui TONG , Zhen LIU
IPC分类号： F02M26/47
摘要： The present disclosure belongs to the technical field of engines, and specifically relates to a gas mixing device and a natural gas engine. The gas mixing device includes a housing, a first mixing core, a first measurement assembly, a second mixing core, and a second measurement assembly. An air inlet and a combustion gas inlet respectively communicate with the first mixing core to form a mixed gas in the first mixing core; the first measurement assembly is connected to the first mixing core, the second mixing core is connected in the housing, the EGR exhaust gas inlet and the first mixing core respectively communicate with the second mixing core, and the second measurement assembly is connected to the EGR exhaust gas inlet. In the gas mixing device according to the embodiment of the present disclosure, the first measurement assembly and the second measurement assembly respectively provide measurement data for obtaining flow rates of the air, combustion gas and EGR exhaust gas. As compared with the speed-density method and the throttle model, the results tend to be more accurate, which facilitates a control of the air-fuel ratio to improve the conversion efficiency of the three-way catalytic converter.

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