Automotive air conditioning apparatus
US4359875A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1981 |
| Grant date | Nov 23, 1982 |
| Priority date | — |
| Expiry date | Apr 21, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2600/0251
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
In on-off controlling a compressor of an automotive air conditioning apparatus in a cooling mode of operation, a compressor control switch responsive to a parameter indicative of an operating condition of the compressor is actuated by an output of a sensor for sensing an engine operating condition of a motor vehicle. During a deceleration, the sensor establishes an electrica path from a power source to the compressor which bypasses the compressor control switch. This bypass path is also set up when the motor vehicle is in a standstill with the engine idled. As a deceleration lasts over a given period of time, a timer is actuated to make a connection between the compressor control switch and the power source alive again. An idling up circuit compensates for a decrease in the engine speed attributable to compressor activation during a constant speed run and/or a standstill of the motor vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.