Vehicle cooling system with system motor control apparatus
US6199398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1998 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Dec 9, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P2060/14
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A vehicle cooling apparatus having a simple construction that enables the size of a cooling fan electric motor to be reduced without the need to increase the number of batteries provided for driving the motor. The cooling fan provides necessary cooling for an engine radiator and an air-conditioning system condenser by driving the motor at an input power lower than its rated power by a predetermined amount until the temperature of the engine cooling water reaches a predetermined temperature. If the water temperature rises above the predetermined temperature, the electric motor input power is increased to a level greater than its rated input power for a predetermined time period. As a result, cooling capacity can be increased and the water temperature can be lowered with a smaller motor when the water temperature has become abnormally high. Because the electric motor is normally driven at an input power lower than its rated input power, the life of the electric motor is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.