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1. 发明授权

US11352967B2 Cylinder charge trapping strategies based on predictive number of skips and staggered implementation of valvetrain dependent operational strategies for internal combustion engines 有权
公开(公告)号：US11352967B2
公开(公告)日：2022-06-07
申请号：US17314309
申请日：2021-05-07
申请人： Tula Technology, Inc.
发明人： Shikui Kevin Chen , Louis J. Serrano , Vijay Srinivasan , Elliott A. Ortiz-Soto , Matthew A. Younkins
IPC分类号： F02D41/06 , F02D41/00 , F01L9/16
摘要： A system and method for controlling an internal combustion engine involving (1) cylinder trapping strategies where one of several pneumatic spring types are dynamically selected for cylinders based at least partially on a predicted number of upcoming skips for each of the cylinders respectively and/or (2) staggering various valvetrain dependent operational engine strategies as operating conditions permit as the internal combustion engine warms up following a cold start.

2. 发明授权

US11306672B2 Use of different pneumatic cylinder spring types in a variable displacement engine for engine and aftertreatment system temperature control 有权
公开(公告)号：US11306672B2
公开(公告)日：2022-04-19
申请号：US17224648
申请日：2021-04-07
申请人： Tula Technology, Inc. , Cummins Inc.
发明人： Matthew A. Younkins , Xi Luo
IPC分类号： F02B27/04 , F02D41/06 , F02D17/02 , F02P5/14 , F02D41/30 , F01L1/34 , F02D41/00 , F01N3/10 , F01N3/035 , F01N3/20 , F01M1/16 , F01L9/16 , F01M1/02 , F01M5/00
摘要： A system and method for a variable displacement internal combustion engine using different types of pneumatic cylinder springs on skipped working cycles to control engine and aftertreatment system temperatures are described. The system and method may be used to rapidly heat up the aftertreatment system(s) and/or an engine block of the engine following a cold start by using one or more different types of pneumatic cylinder springs during skipped firing opportunities. By rapidly heating the aftertreatment system(s) and/or engine block, noxious emissions such as hydrocarbons, carbon monoxide, NOx and/or particulates, following cold starts are significantly reduced.

3. 发明申请

US20230088803A1 ACTUATOR AND METHOD FOR OPERATING AN ACTUATOR 有权
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
IPC分类号： F01L1/46 , F01L9/16
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.

4. 发明申请

US20230003145A1 FULLY VARIABLE ELECTRO-HYDRAULIC VALVE SYSTEM HAVING BUFFERING FUNCTION 有权
公开(公告)号：US20230003145A1
公开(公告)日：2023-01-05
申请号：US17790701
申请日：2020-12-29
申请人： WEIFANG LICHUANG ELECTRONIC TECHNOLOGY CO., LTD
发明人： Lifeng WANG , Xiuqiang WANG
IPC分类号： F01L9/14 , F01L9/20 , F01L9/16 , F01L9/40
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.

5. 发明申请

US20220412237A1 CAMLESS ENGINE 有权
公开(公告)号：US20220412237A1
公开(公告)日：2022-12-29
申请号：US17847160
申请日：2022-06-22
申请人： L&T TECHNOLOGY SERVICES LIMITED
发明人： Murtuza GUNDERWALA
IPC分类号： F01L9/16 , F01L9/40
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.

6. 发明申请

US20220018296A1 CYLINDER CHARGE TRAPPING STRATEGIES BASED ON PREDICTIVE NUMBER OF SKIPS AND STAGGERED IMPLEMENTATION OF VALVETRAIN DEPENDENT OPERATIONAL STRATEGIES FOR INTERNAL COMBUSTION ENGINES 有权
公开(公告)号：US20220018296A1
公开(公告)日：2022-01-20
申请号：US17314309
申请日：2021-05-07
申请人： Tula Technology, Inc. , Cummins Inc.
发明人： Shikui Kevin CHEN , Louis J. SERRANO , Vijay SRINIVASAN , Elliott A. ORTIZ-SOTO , Matthew A. YOUNKINS
IPC分类号： F02D41/00 , F02D41/06 , F01L9/16
摘要： A system and method for controlling an internal combustion engine involving (1) cylinder trapping strategies where one of several pneumatic spring types are dynamically selected for cylinders based at least partially on a predicted number of upcoming skips for each of the cylinders respectively and/or (2) staggering various valvetrain dependent operational engine strategies as operating conditions permit as the internal combustion engine warms up following a cold start.

7. 发明授权

US11619148B2 Cylinder valve assembly with valve spring venting arrangement 有权
公开(公告)号：US11619148B2
公开(公告)日：2023-04-04
申请号：US17269918
申请日：2018-08-23
申请人： VOLVO TRUCK CORPORATION
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.

8. 发明申请

US20210396163A1 Scavenger Valve Method and Device 有权
公开(公告)号：US20210396163A1
公开(公告)日：2021-12-23
申请号：US17461747
申请日：2021-08-30
申请人： Compressor Engineering Corporation
发明人： Justin K. Russell , Ricknold Gregory , Ryan Miller , Christopher Rojas
IPC分类号： F01L1/38 , F01L3/22 , F02B75/02 , F01L9/16
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.

9. 发明授权

US11125124B2 Pneumatic system for an internal combustion engine 有权
公开(公告)号：US11125124B2
公开(公告)日：2021-09-21
申请号：US16960670
申请日：2019-01-18
申请人： VOLVO TRUCK CORPORATION
发明人： Staffan Lundgren , David Carlson , Claes Kuylenstierna
IPC分类号： F01L9/16 , F01L13/06 , F02D13/02 , F01L13/00
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).

10. 发明授权

US11624331B2 Use of different pneumatic cylinder spring types in a variable displacement engine for engine and aftertreatment system temperature control 有权
公开(公告)号：US11624331B2
公开(公告)日：2023-04-11
申请号：US17693016
申请日：2022-03-11
申请人： Tula Technology, Inc.
发明人： Matthew A. Younkins , Xi Luo
IPC分类号： F02D41/06 , F02D17/02 , F02P5/14 , F02D41/00 , F02D41/40 , F01N3/10 , F01L1/34 , F02D41/30 , F01N3/035 , F01N3/20 , F01M1/16 , F01L9/16 , F01M1/02 , F01M5/00
摘要： A system and method for a variable displacement internal combustion engine using different types of pneumatic cylinder springs on skipped working cycles to control engine and aftertreatment system temperatures are described. The system and method may be used to rapidly heat up the aftertreatment system(s) and/or an engine block of the engine following a cold start by using one or more different types of pneumatic cylinder springs during skipped firing opportunities. By rapidly heating the aftertreatment system(s) and/or engine block, noxious emissions such as hydrocarbons, carbon monoxide, NOx and/or particulates, following cold starts are significantly reduced.

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