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公开(公告)号：US20230313770A1
公开(公告)日：2023-10-05
申请号：US18040590
申请日：2021-08-04
Applicant: Stanadyne LLC
Inventor： Robert G. Lucas , Michael Homby , Srinu Gunturu
CPC classification number: F02M59/368 , F04B19/04 , F02M59/027
Abstract: A high-pressure fuel supply pump for a fuel system that supplies a high-pressure fuel injection (GDI) apparatus and a low-pressure fuel injection (PFI) apparatus incorporates an inlet check valve to isolate a low-pressure fuel feed channel in the pump from pressure fluctuations at the inlet of an inlet control valve. Upstream of the inlet check valve, the low-pressure fuel feed channel is connected to a seal chamber surrounding the pumping plunger. Circulating fresh low-pressure fuel through the seal chamber ensures that the pumping plunger and the clearance between the plunger and the pump bore are cooled and lubricated with fuel, even when high pressure fuel is not produced by the high-pressure pump. The low-pressure fuel feed channel is connected to the low-pressure PFI outlet downstream of the seal chamber. This pump configuration provides stable source of low-pressure fuel for a PFI system.
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公开(公告)号：US20230140167A1
公开(公告)日：2023-05-04
申请号：US17975810
申请日：2022-10-28
Applicant: Stanadyne LLC
Inventor： Nicola Fachechi
Abstract: A compact EGR valve uses a BLDC motor to drive a valve member between a closed position blocking flow of exhaust gases and a range of open positions where exhaust gasses flow through the valve. A drive mechanism includes a nut in a fixed position and a screw arranged to rotate within the nut so that rotation of the screw causes the screw to move axially relative to the nut. The screw is coupled to a valve member and the valve member moves axially and rotationally with the screw. The screw slides along the length of a motor shaft as the screw moves axially relative to the nut and motor. Rotation of the valve member within the valve chamber during axial movement aids in removal of deposits that may accumulate within the valve housing.
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公开(公告)号：US20190128208A1
公开(公告)日：2019-05-02
申请号：US15797201
申请日：2017-10-30
Applicant: Stanadyne LLC
Inventor： Richard Paulo Pellini
CPC classification number: F02D41/3094 , F02D41/3845 , F02M55/02 , F02M55/025 , F02M59/022 , F02M59/462 , F02M63/029 , F02M69/046 , F02M2200/40 , F02M2700/1376
Abstract: In a hybrid fuel supply system for the same high pressure supply pump used for gasoline direct injection (DI) is also used to supply the port injection (PI) system. For a given pumping stroke, fuel can be delivered only to the DI system, only to the PI system, or a first portion can be delivered to the DI system and a second portion delivered to the PI system. The pumping chamber always fills to maximum volume. Fuel metering for DI is by a control valve, which when closed delivers fuel into the DI system and when opened “spills” pumped fuel into the PI system. Any “spill” at high pressure opens a pressure regulating valve in the PI system that dumps fuel at excess pressure to a low pressure region to maintain the PI system at a constant target pressure.
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公开(公告)号：US10273920B2
公开(公告)日：2019-04-30
申请号：US14865178
申请日：2015-09-25
Applicant: Stanadyne LLC
Inventor： Robert G. Lucas
Abstract: In a tappet-driven single piston pump, piston side loads caused by return spring out-of-squareness are eliminated by effectively piloting the piston return spring, preferably the associated spring seat, by the tappet, thereby allowing the tappet to bear the spring side load. The piston engages and is returned by the spring seat, but radial clearance between the piston and spring seat is greater than radial clearance between the spring seat and tappet, thus eliminating side loading imparted to the piston. The spring seat can be considered a piston retainer, in which the piston is not closely attached to the retainer but instead exhibits a predefined radial clearance greater than the piloting clearance between the retainer and the tappet.
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公开(公告)号：US20160115928A1
公开(公告)日：2016-04-28
申请号：US14979994
申请日：2015-12-28
Applicant: Stanadyne LLC
Inventor： Mark S. CAVANAGH
CPC classification number: F02M63/0056 , F02M47/027 , F02M61/10 , F02M61/12 , F02M63/0005 , F02M2200/04 , F02M2200/28
Abstract: A needle type fuel injector has a needle control chamber at a pressure subject to a control valve in a control valve chamber which in an opening phase is lifted from its seat to expose the control valve chamber, connecting passage, and needle control chamber to a low pressure drain and in a closing phase is urged against the seat to isolate the control valve chamber, connecting passage, and needle control chamber from the drain. The potential for cavitation at high fuel injection pressure is reduced by throttling the flow of fuel past the control valve seat when the control valve opens, thereby maintaining sufficient back pressure in the control valve chamber and upstream connecting passages.
Abstract translation: 针式燃料喷射器具有在控制阀室内受到控制阀的压力的针控制室，在控制阀室中，打开阶段从其座椅抬起以将控制阀室，连接通道和针控制室暴露于低位 压力排放并且在关闭阶段被推靠在座上以将控制阀室，连接通道和针控制室与排水管隔离开来。 当控制阀打开时，通过节流燃油经过控制阀座的流量来减少在高燃料喷射压力下的气蚀的可能性，从而在控制阀室和上游连接通道中保持足够的背压。
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Patent Agency Ranking
公开(公告)号：US20220381212A1
公开(公告)日：2022-12-01
申请号：US17825806
申请日：2022-05-26
Applicant: Stanadyne LLC
Inventor： Michael Hornby
Abstract: An electromagnetic fuel injection valve includes a coupling between an armature and the valve member that allows limited relative movement of the valve member and armature in both the opening and closing directions of the valve member. An injector body includes a non-magnetic section to focus magnetic flux and attractive force through the armature and pole. A modular power group reduces the cost of assembly and includes a plastic encapsulated coil that is protected from environmental moisture and corrosion. A valve seat incorporates a valve seal which improves fuel flow past the valve member when the fuel injection valve is in the open position.
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公开(公告)号：US20200182238A1
公开(公告)日：2020-06-11
申请号：US16390117
申请日：2019-04-22
Applicant: Stanadyne LLC
Inventor： Richard P. Pellini , Kenneth R. Morel , David G. Palermo , Dominic M. Myren , Yevgeniy Norkin , Michael Wegrzyniak
Abstract: The disclosed inlet check valve is used in a high pressure fuel pump and is comprised of a valve member integrally connected to a valve stem which is coupled to an inlet valve armature. The valve member has a stroke along an axis between an open position and a closed position. An inlet valve solenoid generates a magnetic field in an inlet valve pole to attract the inlet valve armature and move the valve member from the open position to the closed position. In the open position, the valve member contacts an inlet valve stop and a gap greater than the stroke of the valve member is defined along the axis between the inlet valve armature and the inlet valve pole. In the closed position, an inlet valve seat mates with the valve member and an armature gap remains between the inlet valve armature and the inlet valve pole.
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公开(公告)号：US10294906B2
公开(公告)日：2019-05-21
申请号：US14771938
申请日：2014-03-03
Applicant: Stanadyne LLC
Inventor： Robert G. Lucas
Abstract: In a fuel pump and method of operation, an infeed for low pressure fuel leads to a pumping chamber where in an intake phase low pressure fuel is drawn into the pumping chamber and in a pumping phase high pressure fuel is delivered to a common rail. An inlet metering valve and an inlet check valve are upstream of the pumping chamber, and a control system closes the metering valve when no fuel is to be pumped to the common rail. The inlet check valve is also opened while the inlet metering valve is closed and no fuel is to be pumped to the rail. The inlet metering valve can include a proportionally controlled piston that produces a variable quantity of feed fuel and is closable for the no-demand condition with a maximum travel that contacts and holds open the inlet check valve.
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公开(公告)号：US20170254305A1
公开(公告)日：2017-09-07
申请号：US15062774
申请日：2016-03-07
Applicant: Stanadyne LLC
Inventor： Robert G. Lucas
CPC classification number: F02M59/368 , F02M59/367 , F02M59/466 , F02M2200/08 , F04B7/0076 , F04B49/22 , F04B53/10 , F04B53/1082 , F16K27/029 , F16K31/0648 , F16K31/0675
Abstract: An inlet valve assembly for a fuel pump comprises a valve assembly inflow path and valve assembly outflow path; a magnetic valve member situated in an intermediate flow path fluidly linking the inflow path and the outflow path; a magnetic pole adjacent the valve member; and a selectively energizable coil for generating a magnetic flux directly magnetically coupling the pole and the valve member; whereby the valve member opens and closes fluid communication between the inflow path and the outflow path in response to the energized state of the coil.
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公开(公告)号：US20210332906A1
公开(公告)日：2021-10-28
申请号：US17147765
申请日：2021-01-13
Applicant: Stanadyne LLC
Inventor： Nicola Fachechi , Paul D. Free , Walter A. Hoemann
Abstract: An actuator is driven by a brushless motor having a rotor with axially extended magnets, permitting axial movement of the rotor while maintaining overlap between the magnets and a stator secured in a fixed position. The rotor is engaged with a fixed structure by a connection such as a ramp or thread that translates rotation into axial movement of the rotor along a rotational axis of the actuator. A valve member coupled to the rotor moves axially between a closed position and a range of positions that regulate fluid flow through a valve. A motor control circuit applies power to the stator coils to rotate the rotor and coupled valve member to a desired axial position and maintain the rotor and valve member at the selected position. The rotor and valve member may be biased toward a rotational position corresponding to a closed position of the valve member.
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