Variable displacement pump and control therefor

• US 7,396,214 B2
• Filed: 02/08/2006
• Issued: 07/08/2008
• Est. Priority Date: 04/03/2002
• Status: Expired due to Fees

• Current Assignee: SLW Automotive, Inc.
• Original Assignee: BorgWarner Incorporated
• Inventors: Koenig, Dennis, Hunter, Douglas G.
• Primary Examiner(s): Koczo, Jr.; Michael
• Application Number:
  US11/349,705
• Publication Number:
  US 20060127229A1
• Time in Patent Office: 881 Days
• Field of Search: 123/196.R, 184/6.5, 417/212, 417/213, 417/219, 417/220, 418/26, 418/27, 418/30, 418/31
• US Class Current: 417/213
• CPC Class Codes: F01M 1/16 Controlling lubricant pressure or quantity rendering machines or engines inoperative or idling on lubricant pressure failure F01M1/22
• CPC Class Codes: F04C 14/22 by changing the eccentricity between cooperating members
• CPC Class Codes: F04C 2270/01 Load
• CPC Class Codes: F04C 2270/052 angular
• CPC Class Codes: F04C 2270/18 Pressure

Abstract

A control system for a variable displacement pump. The control system is operably associated with an engine control unit for passively or actively controlling the output of the pump in response to signals from the engine control unit.

Claims

1. A variable displacement pump for an engine having an engine control unit comprising:

a pump having an actuator that controls the pressure and flow of oil to a pressure lubricating circuit of an engine;

a pilot pressure line that has oil flow and oil pressure supplied by the engine;

a flow control valve for hydraulically varying the pump displacement by facilitating movement of said actuator; and

a solenoid controlled by said engine control unit, said solenoid is connected to the flow control valve and controls the position of said flow control valve and provides control of oil flow through said flow control valve.

2. The control system of claim 1, wherein the valve member is connected to a sump, so that when the solenoid opens the valve member, an input pressure to the actuating member increases.