Engine and transmission temperature control system
US10132403B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2017 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | May 18, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P2060/045
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A transmission oil cooler transfers heat between Automatic Transmission Fluid (ATF) and engine coolant. During initial vehicle warm-up, heat is transferred from the engine coolant to the ATF, assisting the transmission warm-up. A priority valve may limit the flow of coolant to the transmission oil cooler until the coolant temperature is sufficient to ensure adequate cabin heating performance. After both the engine and transmission have reached normal operating temperatures, heat is transferred from the ATF to the engine coolant. An auxiliary radiator pre-cools the engine coolant before it enters transmission oil cooler. This increases the cooling of the ATF and avoids coolant temperature increase during aggressive maneuvers. When the ATF temperature is below a threshold, a coolant control valve diverts coolant around the auxiliary radiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.