Patent · US Active

Transmission fluid warming and cooling method

US8631772B2 · kind B2 · utility

8Cited by
22References
22Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 21, 2010
Grant dateJan 21, 2014
Priority date
Expiry dateAug 8, 2032

Classification

  • Technology area (CPC F)Mechanical Engineering; Lighting; Heating
  • CPC primaryF16H57/0475
  • WIPO fieldMechanical elements
  • WIPO sectorMechanical engineering

Abstract

A method for controlling the temperature of transmission fluid in a motor vehicle includes operating in an automatic transmission fluid cooling mode, a heater priority mode entered by disabling automatic transmission fluid heating, and an automatic transmission fluid heating mode which includes sending hot engine coolant to a heat exchanger for heating the automatic transmission fluid by transferring heat from the hot engine coolant to the automatic transmission fluid. The method switches to from a heater priority mode to a transmission heating mode base on a number of sensed conditions including sensed automatic fluid transmission temperature. The method also includes an automatic transmission fluid temperature regulating mode including measuring an automatic transmission fluid temperature and switching between the cooling mode and the heating mode based measured temperature.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.