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公开(公告)号：US11773757B2
公开(公告)日：2023-10-03
申请号：US17795512
申请日：2020-12-29
发明人： Lifeng Wang , Xiuqiang Wang
摘要： A compression release engine in-cylinder braking system, comprising a valve mechanism, an oil cylinder device, an oil pump device, and an oil supply device. The oil cylinder device and the oil pump device of each air cylinder communicate with each other through a pressure transmission oil circuit, which communicates with the oil supply device through a low-pressure relief valve. An air release valve is arranged at the high end of an oil circuit system. During in-cylinder braking, the air release valve is closed, an electromagnetic reversing valve is energized, engine oil having a pressure of P1 is supplied to the pressure transmission oil circuit, and a cam abuts against and pushes the oil pump device to pump high-pressure oil to the oil cylinder device, so as to push a rocker arm to open a valve, thereby achieving in-cylinder braking.
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公开(公告)号：US11725548B2
公开(公告)日：2023-08-15
申请号：US17847160
申请日：2022-06-22
发明人： Murtuza Gunderwala
CPC分类号： F01L9/16 , F01L9/40 , F02D13/0253 , F01L2201/00 , F01L2820/031 , F01L2820/034 , F01L2820/042
摘要： The present disclosure relates to a camless engine in which a camless system is configured for controlling one or more engine valves of an internal combustion engine is disclosed. The system comprises a pneumatic accumulator configured to store compressed air, and at least one pneumatic actuator having a piston rod. The pneumatic actuator is configured for abutment with the engine valves of the internal combustion engine. The system further comprises at least one pneumatic control valve fluidly connected between the pneumatic accumulator and the pneumatic actuator, a sensor configured to sense an engine parameter and to transmit a signal to actuate the pneumatic control valves and an electronic control unit configured to control the pneumatic valves based on the signal received from the sensor.
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公开(公告)号：US20230088803A1
公开(公告)日：2023-03-23
申请号：US17908435
申请日：2021-03-01
申请人： FREEVALVE AB
发明人： Anders HÖGLUND , Eric GRIESS , Daniel JAKOBSSON , Urban CARLSON
摘要： An actuator and a method for controlling such an actuator suitable for operating at least one gas exchange valve arranged in a cylinder head of an internal combustion engine. The actuator includes: an actuator piston disc, a cylinder volume adapted for the actuator piston disc, where the actuator piston disc divides the cylinder volume in a first portion and a second portion, an inlet channel arranged between a pressure fluid inlet and the first portion of the cylinder volume, a controllable first inlet valve arranged in the inlet channel, a controllable second inlet valve arranged downstream the controllable first inlet valve, an outlet channel arranged between the first portion of the cylinder volume and a pressure fluid outlet, and a controllable outlet valve arranged in the outlet channel.
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公开(公告)号：US20230003145A1
公开(公告)日：2023-01-05
申请号：US17790701
申请日：2020-12-29
发明人： Lifeng WANG , Xiuqiang WANG
摘要： A fully variable electro-hydraulic valve system having a buffering function, comprising: a camshaft (101), a valve assembly (106), a sliding sleeve (103), a spiral shaft (102), a piston (105), and a position restoring spring (104); the sliding sleeve (103) is fixed relative to an engine; the piston (105) abuts against the valve assembly (106); the spiral shaft (102) is controlled by a cam surface of the camshaft (101) in the axial direction; a spiral surface (102E) is provided at a first end of the spiral shaft (102), and a control gear (102A) is provided at a second end thereof; the sliding sleeve (103) is provided with a buffering oil hole (123) that communicates with a buffering cavity (R), and the buffering oil hole (123) communicates with a low-pressure oil circuit of the engine by means of a throttling device (124). When a valve is going to be seated, the piston (105) firstly collides with a buffering ring (121); due to the effect of the throttling device (124), engine oil within the buffering cavity (R) has a damping effect on the movement of the buffering ring (121), such that the valve is slowly seated, thus reducing the impact damage caused to the valve and a sealing surface of a valve seat, thereby effectively prolonging the service life of a valve system.
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公开(公告)号：US11828238B2
公开(公告)日：2023-11-28
申请号：US16754036
申请日：2018-10-16
发明人： Mats Hedman
CPC分类号： F02D13/0223 , F01L9/16 , F01L9/20 , F02B75/02 , F02B2075/025
摘要： The present invention concerns a method in a two-stroke engine comprising at least one cylinder (1) with a reciprocating piston (2), a delimited combustion space (5), at least one outlet port (7) and an inlet port (9) which are both uncovered at the bottom dead center position of the piston, an actuator (8) which activates a valve (17) to open and introduce combustion air via an inlet pipe (6), a control system (15) which controls the actuator to open the valve in order to introduce combustion air via the inlet port. The invention is characterized in that the inlet port is closed by the piston after the outlet port has been closed, thus the opposite compared to the two-stroke engines of today.
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公开(公告)号：US11619148B2
公开(公告)日：2023-04-04
申请号：US17269918
申请日：2018-08-23
发明人： Claes Kuylenstierna
IPC分类号： F01L9/16
摘要： The invention relates to a cylinder valve assembly (19) comprising a pneumatic valve spring arrangement (25) including a first (29) and a second (31) valve spring member defining a valve spring cavity (33), and a valve spring venting arrangement (27) comprising a first venting cavity portion (37) in fluid flow connection with the valve spring cavity (33); a second venting cavity portion (39); a movable sealing member (41) arranged to allow a pressure difference between the first venting cavity portion (37) and the second venting cavity portion (39); a feedback channel fluid flow connecting the first venting cavity portion (37) and the second venting cavity portion (39); and a venting channel (53). The sealing member (41) is configured to be movable between a first sealing member position where the sealing member (41) prevents fluid flow from the first venting cavity portion (37) through the venting channel (53); and a second sealing member position where the sealing member (41) allows fluid flow from the first venting cavity portion (37) through the venting channel (53). The valve spring venting arrangement (27) further comprises an elastic member (55) urging the sealing member (41) towards the first sealing member position.
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公开(公告)号：US20210396163A1
公开(公告)日：2021-12-23
申请号：US17461747
申请日：2021-08-30
摘要： A scavenger valve and method of directing gas in a two stroke engine are provided involving poppet elements in a scavenger valve with specific multiple, different flow paths from individual poppet heads.
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公开(公告)号：US11125124B2
公开(公告)日：2021-09-21
申请号：US16960670
申请日：2019-01-18
摘要： The invention relates to a system (100) for operating a valve of an internal combustion engine (10), said system comprising a primary fluid circuit (60) configured to define a fluid passageway for circulating a compressible fluid medium there through being operatively connectable to an actuator (92) of an actuated flow control valve (90, 95) of said internal combustion engine, thereby capable of delivering a valve opening force. The system further comprises: a secondary fluid circuit (80) configured to define a secondary fluid passageway for transporting a compressed fluid medium, and having an inlet passage (87) connectable to a cylinder for receiving the compressed fluid medium; and an auxiliary pressurized system (81) comprising a chamber (83) and at least one reciprocating member (82) operable in said chamber (83), said auxiliary pressurized system (81) being arranged in fluid communication with said secondary fluid circuit (80) and in fluid communication with said primary fluid circuit such that said at least one reciprocating member (82) pressurizes said primary fluid circuit when said compressed fluid medium of the secondary fluid circuit acts on said at least one reciprocating member (82).
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公开(公告)号：US11852056B2
公开(公告)日：2023-12-26
申请号：US16963688
申请日：2018-02-05
发明人： Arne Andersson , Bengt Lassesson
CPC分类号： F01M1/08 , F01L9/16 , F01M11/02 , F02D13/0226 , F02D13/0253 , F02D13/0265 , F02D13/0273 , F01L2800/05 , F01L2800/19 , F01L2810/02 , F01M2001/086 , F01M2011/025 , F01M2011/027
摘要： The present invention relates to a method for controlling lubrication of a connecting rod bearing of an internal combustion engine arrangement. The method comprises the steps of controlling an inlet valve to be maintained in the closed position during a movement of the reciprocating piston from the top dead center during an intake stroke for a predetermined number of crank angle degrees; and positioning the inlet valve in the open position when the reciprocating piston has traveled the predetermined number of crank angle degrees from the top dead center, wherein lubricating medium is provided to the connecting rod bearing within a predetermined time period before the inlet valve is arranged in the open position.
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10.发明公开公开(公告)号：US20230407747A1
公开(公告)日：2023-12-21
申请号：US18252506
申请日：2020-11-11
发明人： Cyril NEGRE , Christophe HURTH
CPC分类号： F01B17/025 , F01B25/10 , F01L1/146 , F01L1/181 , F01L9/16 , F01L2003/258
摘要： Disclosed is an active chamber engine including a cylinder fed with compressed air, a piston, a cylinder head which includes an intake duct, an intake orifice, an intake valve, wherein the volume of the cylinder is divided into an included active chamber and an expansion chamber and the torque and the speed of the engine are controlled by the opening and closing of the intake valve characterized in that the intake valve moves in the direction opposite to the flow direction of the pressurized gas stream in its opening direction and is held closed on a seat by a return spring in its closing position, and that the axial forces acting on the intake valve resulting from the pressure in the intake duct and in the cylinder are permanently balanced.
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