发明名称 |
Direct injection pump control strategy for noise reduction |
摘要 |
A pump may have a first chamber and a solenoid coil to control movement of a first valve member. A second chamber may have a second valve member to control fluid moving into a third chamber. A first fluid passageway may link the first and second chambers, a second passageway may link second and third chambers and a third passageway may link third and fourth chambers. After pressurizing the third chamber causing fluid to flow into and leave a fourth chamber, the third chamber depressurizes due to downward movement of a plunger. Upon depressurization with a solenoid coil energized, second valve member floats and then moves against a valve seat. While the second valve member is moving toward the valve seat, the solenoid coil is de-energized causing the first valve member to move and strike the second valve member when the second valve member is moving at maximum velocity. |
申请公布号 |
US9435334(B2) |
申请公布日期 |
2016.09.06 |
申请号 |
US201414170749 |
申请日期 |
2014.02.03 |
申请人 |
Denso International America, Inc.;DENSO CORPORATION |
发明人 |
Furuhashi Tsutomu;Spence Rebecca;Lubinski Joseph;Ramamurthy Dhyana;Oda Kaoru |
分类号 |
F02M57/02;F04B49/06;F02D41/38;F02M59/36;F02M63/00;F04B39/00;F02D41/08 |
主分类号 |
F02M57/02 |
代理机构 |
Harness, Dickey & Pierce, P.L.C. |
代理人 |
Harness, Dickey & Pierce, P.L.C. |
主权项 |
1. A method of controlling a pump, comprising:
providing the pump with a casing that defines a first chamber, a second chamber, a third chamber and a fourth chamber; providing a fluid inlet in the first chamber and a fluid outlet in the fourth chamber; providing a first movable valve member in the first chamber and a second movable valve member in the second chamber; providing a third movable valve member in the fourth chamber; providing a solenoid coil; during a suction stroke of the pump, moving a plunger in the third chamber away from the third chamber so that a volume of the third chamber increases to move the second valve member towards a stop and to cause the second valve member to collide against the stop; moving the third valve member against a valve seat to prevent fuel from exiting through the fluid outlet; during a pumping stroke of the pump, energizing the solenoid coil attracting the first movable valve member toward the solenoid coil, and moving the second movable valve member against a second valve seat; maintaining energizing of the solenoid coil before and after a top dead center position of the plunger; and decreasing an energy for energizing of the solenoid coil linearly prior to the top dead center position. |
地址 |
Southfield MI US |