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公开(公告)号：US20240247629A1
公开(公告)日：2024-07-25
申请号：US18562697
申请日：2022-05-30
发明人： Hisao OGAWA
IPC分类号： F02M59/44
CPC分类号： F02M59/44
摘要： Provided is a fuel pump including: a pump head (23); a plunger barrel (32) in which a support hole (38) is provided, and one end section of which in the axial direction of the support hole (38) is screw-fastened into the pump head (23); a plunger (41) that is supported in the support hole (38) so as to be freely movable in the axial direction; a pressurization chamber (56) that is defined by one end of the support hole (38) and one end of the plunger (41); a fuel discharge passage (73) one end of which communicates with the pressurization chamber (56); and a fuel suction passage (70) one end of which communicates with the pressurization chamber (56).
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公开(公告)号：US11994093B2
公开(公告)日：2024-05-28
申请号：US18119261
申请日：2023-03-08
发明人： Yu Hirao , Shinya Matsuo
CPC分类号： F02M63/0265 , F02M55/025 , F02M59/44
摘要： [Problem] To provide, in an engine provided with two cylinder rows, a technology that, while suppressing a cost increase, can suppress a difference in combustion performance between the cylinder rows.
[Solution] An exemplary engine includes: a first cylinder row having plural cylinders arranged in a front and rear direction; a second cylinder row arranged parallel to the first cylinder row; plural first injectors provided for the respective cylinders of the first cylinder row, plural second injectors provided for respective cylinders of the second cylinder row; and a fuel pump having a first discharge port to discharge a fuel to the plural first injectors and a second discharge port to discharge a fuel to the plural second injectors. The fuel pump is placed between the first cylinder row and the second cylinder row in a plan view from an up and down direction.-
公开(公告)号：US11634576B2
公开(公告)日：2023-04-25
申请号：US17051919
申请日：2019-04-24
发明人： Hiroki Arai , Tomohiro Monma
摘要： A polyacetal resin composition capable of minimizing degradation when a molded body thereof comes into contact with an acidic cleaner. The polyacetal resin composition contains with respect to (A) 100 parts by mass of a polyacetal copolymer in which the amount of a hemiformal end group is 0.8 mmol/kg or less, (B) more than 1.0 parts by mass and at most 5.0 parts by mass of a hindered phenol-based antioxidant, and (C) more than 4.0 parts by mass and at most 30 parts by mass of magnesium oxide.
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公开(公告)号：US20230096056A1
公开(公告)日：2023-03-30
申请号：US17910820
申请日：2021-02-01
申请人： Robert Bosch GmbH
发明人： Markus Schetter
IPC分类号： F02M59/44 , F04B1/0439 , F04B53/16
摘要： A high pressure fuel pump includes (i) a pump housing, (ii) a pump piston, (iii) a high pressure seal which is disposed between the pump piston and the pump housing and seals the pump piston with respect to a high pressure region, and (iv) an annular guide element which guides the pump piston in a sliding fit and which is disposed towards the high pressure region when seen from the high pressure seal. The annular guide element has at least one fluid connection which fluidically connects a first region to a second region. The first region is adjacent to a first end face of the guide element. And the second region is adjacent to a second end face of the guide element.
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公开(公告)号：US11441558B2
公开(公告)日：2022-09-13
申请号：US17122463
申请日：2020-12-15
发明人： Kyung Chul Han , Hyeong Kyun Park , Jin Sung Kim , Chun Ky Hong
摘要： A guide for a piston of a high-pressure pump includes: an upper body and a lower body, a connection part integrally connecting the upper body and the lower body, and a seal molded by an insert injection between the upper body and the lower body while surrounding the connection part. A gap exists between the upper body and the lower body, and the piston and the seal are in close contact with a piston. Therefore, it is possible to prevent leakage of fuel even while securing motion performance of the piston.
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公开(公告)号：US11261820B2
公开(公告)日：2022-03-01
申请号：US16936753
申请日：2020-07-23
申请人： DENSO CORPORATION
发明人： Tamaki Ishikawa
摘要： A fuel pump includes a camshaft that rotates in accordance with operation of an engine and a tappet provided in contact the camshaft. An ECU includes an angle determination unit configured to determine whether a rotation angle from a start of rotation of the camshaft when starting the engine is under a predetermined angle required for forming an oil film on a sliding portion of the tappet, and a control unit configured to, when the rotation angle from the start of rotation of the camshaft is determined to be under the predetermined angle, execute a limit process including at least one of limiting a fuel discharge pressure of the fuel pump or limiting a rotation of the camshaft.
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公开(公告)号：US11236682B2
公开(公告)日：2022-02-01
申请号：US15902898
申请日：2018-02-22
IPC分类号： F02C9/26 , F02M39/02 , F02C7/236 , F04C15/00 , F04D25/06 , F04D27/00 , F04D29/22 , F04D29/58 , F02M59/44 , F04D13/12 , F04C2/08
摘要： A fuel pump system for a turbomachine engine can include a boost pump driven by an electric motor and configured to be in fluid communication with a fuel tank, a primary pump configured to be driven by a shaft connected to the turbomachine engine, wherein the primary pump is in fluid communication with the boost pump downstream of the boost pump by a boost branch, a bypass flow branch that connects the boost branch to a downstream branch that is downstream of the primary pump, the downstream branch is in fluid communication with one or more metering valves and/or one or more fuel nozzles, and a bypass valve disposed in the bypass flow branch and/or the downstream branch and configured to selectively directly fluidly communicate the boost branch and the downstream branch.
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公开(公告)号：US11215154B2
公开(公告)日：2022-01-04
申请号：US16543802
申请日：2019-08-19
发明人： Atsuji Saito
摘要： The damper mechanism used for a high-pressure fuel supply pump is configured so that an outer circumferential surface of a cover in regard to the thickness direction of the base material of the cover engages with the inner circumference of an open end part of a bottomed tubular concave part formed in a damper housing or in a pump housing of the high-pressure fuel supply pump. The total height of the damper as a low-pressure pulsation reducing mechanism can be reduced, and the dimensions of the damper in the radial directions can also be reduced. In cases where the damper mechanism is formed integrally with the high-pressure fuel supply pump, the total height of the high-pressure fuel supply pump can be reduced and the dimensions of the damper part in the radial directions can also be reduced.
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公开(公告)号：US11131282B2
公开(公告)日：2021-09-28
申请号：US16800006
申请日：2020-02-25
申请人： DENSO CORPORATION
发明人： Naoya Tamai
IPC分类号： F02M45/06 , F02M59/44 , F02M59/10 , F04B9/04 , F04B1/0413 , F04B1/0417
摘要： A fuel injection pump pressurizes and injects fuel. A cam rotates about a rotational axis of the cam. A housing includes a cam chamber that houses the cam and a sliding chamber communicated to the cam chamber. A roller rotates while being in contact with a surface of the cam. A shoe reciprocates in the sliding chamber by rotation of the cam and is in contact with and slides on a surface of the roller. A plunger reciprocates with the shoe. A cylinder houses the plunger and includes a pump chamber to pressurize and feed the fuel by reciprocation of the plunger. A deformed section is a groove or a protrusion which extends in a direction of a rotational axis of the cam, on a part of a surface of the cam, and has a shape different from a cam profile of the cam.
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公开(公告)号：US20210293213A1
公开(公告)日：2021-09-23
申请号：US17337371
申请日：2021-06-02
申请人： Donald John JACKSON
发明人： Donald John JACKSON
IPC分类号： F02M51/04 , F02M65/00 , F02M63/02 , F02M59/34 , F02M37/00 , F02M59/44 , F02M59/20 , F02D41/38 , F02M41/12
摘要： Electronic fuel injection for an internal combustion engine maintains an operator-specified air-to-fuel ratio during engine operations in high-speed, high-volume, mixed fuel applications. A microprocessor-based controller executes a program stored in memory to calculate a fuel flow value as a function of the specified air-to-fuel ratio and specified density ratio of mixed fuels. The controller outputs a control signal to a variable fuel flow relief valve and receives feedback from an engine fuel flow sensor. The controller adjusts the control signal until the feedback matches the fuel flow value. The program optimizes the fuel flow value by accounting for engine air flow, water vapor density, and dry air density effects in the calculation, based on signals received by the controller from various environmental sensors. The system has particular application in dragster engines that burn a mixture of nitromethane and methanol.
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