TRANSMISSION OIL COOLING SYSTEM

• US 3,752,222 A
• Filed: 11/18/1971
• Issued: 08/14/1973
• Est. Priority Date: 11/18/1971
• Status: Expired due to Term

• Current Assignee: John H. Jr. Olbermann
• Original Assignee: John H. Jr. Olbermann
• Inventors: Olbermann, John H. Jr.
• Primary Examiner(s): Sukalo, Charles
• Application Number:
  US05/200,111
• Time in Patent Office: 635 Days
• Field of Search: 165/35,36,37,38,17
• US Class Current: 165/280
• CPC Class Codes: F01M 5/007 Thermostatic control
• CPC Class Codes: F01P 11/08 Arrangements of lubricant coolers in lubrication apparatus F01M
• CPC Class Codes: F01P 2003/187 arranged in series
• CPC Class Codes: F01P 2060/04 Lubricant cooler
• CPC Class Codes: F01P 2060/045 for transmissions
• CPC Class Codes: F01P 3/20 Cooling circuits not specific to a single part of engine or machine F01P3/22 takes precedence
• CPC Class Codes: F16H 57/0413 Controlled cooling or heating of lubricant; Temperature control therefor
• CPC Class Codes: F16H 57/0415 Air cooling or ventilation; Heat exchangers; Thermal insulations
• CPC Class Codes: F28D 1/0417 with particular circuits for the same heat exchange medium, e.g. with the heat exchange medium flowing through sections having different heat exchange capacities or for heating/cooling the heat exchange medium at different temperatures
• CPC Class Codes: F28D 1/0435 Combination of units extending one behind the other F28D1/0452 takes precedence
• CPC Class Codes: F28D 2021/0089 Oil coolers

Abstract

A transmission oil cooling system is improved by a thermostatically controlled bypass valve in the line transferring transmission oil to the oil cooling system whereby the oil flows to the cooling system when the oil is at the desired operating temperature and the valve is opened by the thermostat, but the oil is directed to the return line when below operating temperature and the valve is closed by the thermostat.

Claims

1. A cooling system for cooling torque converter transmission oil comprising a transmission, a torque converter utilizing transmission oil as a driving means, a heat exchange system for cooling said transmission oil comprisIng in series a radiator containing said oil in heat exchange relationship with air and engine cooling fluid and an auxiliary for said oil, an oil transfer line from said transmission and torque converter to the inlet of said heat exchange system, an oil return line from the outlet of said heat exchange system, a bypass housing in said oil transfer line containing a bypass valve activated by a thermostat on the inlet side to be open at about 180* and above, said oil flowing through said housing, take-off line and cooling system and returning to the transmission in said temperature range, and said oil being diverted through a bypass line from said inlet side directly to said return line and transmission below said temperature range.

2. A system as in claim 1 wherein there is a check valve in the bypass line.