US4926651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for automobile air-conditioners
Assignee: Bosch Corp
•
Filing: 1989-03-30
•
Granted: 1990-05-22
•
Expires: 2009-03-30
Abstract
Abstract In a control apparatus for automobile air-conditioners including a variable displacement compressor and a fast idling device, the operation of the fast idling device is retarded until a predetermined discharge pressure of the variable displacement compressor is detected by a pressure sensor. With this retarded operation, it is possible to prevent the engine from rotating at an undue speed when the engine is operating under the fast idling mode.
Inventors
- 👤 Ichiro Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:34
CPC Classifications
F; F02; F02M; F02M3/00; F02M3/06; F02M3/07; B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; B60H1/3205; B60H1/3208; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/08; F02D41/083
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
A control apparatus for an automobile air-conditioner, comprising: (a) a variable displacement compressor driven by an engine and operative to vary its displacement gradually from a small displacement to a large displacement immediately after it is started; (b) a fast idling device responsive to the start of operation of said variable displacement compressor and operative to increase the idling speed of said engine by a predetermined value; (c) a pressure sensor for detecting a discharge pressure of said variable displacement compressor; and (d) idling-up control means for retarding operation of said fast idling device until detection of a predetermined discharge pressure of said variable displacement compressor by said pressure sensor.
Claim 2
Dependent Claim
110 words
A control apparatus for an automobile air-conditioner, comprising: (a) a variable displacement compressor driven by an engine and operative to vary its displacement gradually from a small displacement to a large displacement immediately after it is started; (b) a fast idling device responsive to the start of operation of said variable displacement compressor and operative to increase the idling speed of said engine by a predetermined value; (c) a pressure sensor for detecting a discharge pressure of said variable displacement compressor; and (d) idling-up control means for retarding operation of said fast idling device until detection of a predetermined discharge pressure of said variable displacement compressor by said pressure sensor.
Claim 3
Dependent Claim
26 words
A control apparatus according to claim 1, said variable displacement compressor being operative to varying its displacement in response to an external control signal supplied thereto.
Claim 4
Dependent Claim
21 words
A control apparatus according to claim 2, said external signal being generated by a displacement control means disposed outside said compressor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |