US4750385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake responsive automatic transmission control apparatus
Assignee: Aisin Corp
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Filing: 1986-03-26
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Granted: 1988-06-14
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Expires: 2006-03-26
Abstract
Abstract An automatic transmission control apparatus detects an abrupt loss of vehicle speed from the speed sensor due to failure of the speed sensor. The control apparatus detects a condition of the brake operation so that the abrupt loss of the vehicle speed is detected for transmission control purposes when the brake is under non-operating conditions.
Inventors
- 👤 Mitsuo Yamamoto
- 👤 Takaki Manabe
- 👤 Nobuyoshi Nagura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:52
CPC Classifications
F; F16; F16H; F16H59/00; F16H59/36; F16H61/00; F16H61/12; F16H2059/006; F16H2061/1208; F16H2061/122; F16H2061/1232; F16H2061/1256; F16H2061/1284; F16H59/44; F16H59/50; F16H59/54; Y; Y10; Y10S; Y10S477/00; Y10S477/906
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
An automatic transmission control apparatus comprising: speed sensor means for detecting a wheel speed; throttle opening sensor means for detecting the throttle opening of an engine; shift position sensor means for detecting the position of a shift lever; brake sensor means for detecting a condition of a brake operation; and first means for shifting the automatic transmission in accordance with the signals from said speed sensor means, said throttle opening sensor means and said shift position sensor means; second means for detecting an abrupt loss of the wheel speed; third means for determining whether the abrupt loss of the wheel speed occurs while the brake is in an operating or non-operating condition; and fourth means for shifting the automatic transmission in response to said third means determining that the abrupt loss of the wheel speed occurs when said brake is in non-operating condition.
Claim 2
Dependent Claim
143 words
An automatic transmission control apparatus comprising: speed sensor means for detecting a wheel speed; throttle opening sensor means for detecting the throttle opening of an engine; shift position sensor means for detecting the position of a shift lever; brake sensor means for detecting a condition of a brake operation; and first means for shifting the automatic transmission in accordance with the signals from said speed sensor means, said throttle opening sensor means and said shift position sensor means; second means for detecting an abrupt loss of the wheel speed; third means for determining whether the abrupt loss of the wheel speed occurs while the brake is in an operating or non-operating condition; and fourth means for shifting the automatic transmission in response to said third means determining that the abrupt loss of the wheel speed occurs when said brake is in non-operating condition.
Claim 3
Dependent Claim
28 words
An automatic transmission control apparatus according to claim 1 wherein wheel said fourth means for shifting the automatic transmission is inoperable when the brake is under operating conditions.
Claim 4
Dependent Claim
80 words
An automatic transmission control apparatus according to claim 1 further comprising rotational sensor means for detecting the rotation of the engine wherein said fourth means for shifting the automatic transmission shifts the automatic transmission to a higher gear ratio in response to said second means for detecting an abrupt loss of the wheel speed and shifts the automatic transmission in response to the position signal from said shift position sensor means when the engine rotation is under a predetermined level.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |