ENGINE AND TRANSMISSION FLUID SUPPLY SYSTEM

• US 3,642,097 A
• Filed: 10/22/1970
• Issued: 02/15/1972
• Est. Priority Date: 10/22/1970
• Status: Expired due to Term

• Current Assignee: Erkki A. Koivunen
• Original Assignee: Erkki A. Koivunen
• Inventors: Koivunen, Erkki A.
• Primary Examiner(s): Antonakas, Manuel A.
• Application Number:
  US05/082,893
• Time in Patent Office: 481 Days
• Field of Search: 74/645,730 60/DIG.3,54 184/6,6U 123/186
• US Class Current: 184/6
• CPC Class Codes: F16H 47/08 the mechanical gearing being of the type with members having orbital motion F16H47/065 takes precedence
• CPC Class Codes: Y10T 74/19153 Condition responsive control

Abstract

A vehicle power train, an engine and a transmission having a common fluid supply provided by a pump which is driven by the engine, a pressure regulator valve that regulates the pressure of the fluid supplied by the pump and delivers excess flow to a hydrodynamic torque converter in the transmission, a valve that delivers flow from the converter to lubricate the engine and prevents flow in the opposite direction and a lubricant control valve that delivers controlled fluid flow from the pump to lubricate the engine below a predetermined engine lubrication pressure and at a higher predetermined engine lubrication pressure blocks fluid flow from the pump to lubricate the engine and then delivers fluid from the converter to lubricate the transmission.

Claims

1. In combination, an engine, a transmission including a hydrodynamic torque converter, a pump driven by said engine for supplying fluid under pressure, pressure-regulator valve means for regulating the pressure of the fluid supplied by said pump at a predetermined value and delivering any excess fluid to said converter, valve means for delivering fluid from said converter to lubricate said engine and preventing fluid flow in the opposite direction, and lubricant-control valve means for delivering fluid from said pump to lubricate said engine below a predetermined engine lubrication pressure and for blocking fluid flow from said pump to lubricate said engine while delivering fluid from said converter to lubricate said transmission above said predetermined engine lubrication pressure.

2. In combination, an engine, a transmission including a hydrodynamic torque converter, a pump driven by said engine for supplying fluid under pressure, lubricant-control valve means for delivering and controlling fluid flow from said pump to lubricate said engine with a regulated engine lubrication pressure, pressure-regulator valve means for regulating the pump pressure and delivering any excess fluid to said converter, valve means for delivering fluid from said converter to lubricate said engine with increased pressure and preventing fluid flow in the opposite direction, and said lubricant-control valve means being further operable at a predetermined engine lubrication pressure higher than said regulated engine lubrication pressure to block fluid flow from said pump to lubricate said engine while delivering fluid from said converter to lubricate said transmission.

3. In combination, an engine, a transmission including a hydrodynamic torque converter, a pump driven by said engine for supplying fluid under pressure, pressure-regulator valve means for regulating the pressure of the fluid supplied by said pump at a predetermined value and delivering any excess fluid to said converter-check valve means for delivering fluid from said converter to lubricate said engine and preventing fluid flow in the opposite direction, and lubricant-control valve means for controlling fluid delivery to both said engine and said transmission comprising a valve element operable in a first position to deliver fluid from said pump to lubricate said engine and further operable in a second position to block fluid flow from said pump to lubricate said engine while delivering fluid from said converter to lubricate said transmission and further operable between said positions to provide a variable opening for fluid flow from said pump to said engine, spring means for normally biasing said valve element to said first position, said valve element having pressure-responsive means responsive to the pressure of the fluid supplied to said engine to bias said valve element against said spring means toward said second position so that said valve element is held in said first position below a predetermined engine lubrication pressure and is moved towards said second position on engine-lubrication-pressure increase above said predetermined pressure to maintain said engine lubrication pressure at said predetermined pressure and is moved to said second position at a higher predetermined engine lubrication pressure effected by flow from said converter.