Air conditioning intake door control
US6168515A · kind A · utility
11Cited by
3References
12Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 7, 1999 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Jul 7, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60H1/00849
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle air conditioning control system includes an actuator for controlling the position of an outside air intake door and an ambient exhaust gas sensor. A controller of the control system monitors a time rate of change of the degree of uncleanness periodically measured on the basis of the output of the sensor, and commands the actuator to bring the intake door to the fully closed position for the inside air recirculation mode if a first requirement about a previous exhaust gas concentration change and a second requirement about a current exhaust gas concentration change are both met.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.