US4955255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission system for a motor vehicle with an automatic transmission
Assignee: Subaru Corp
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Filing: 1988-12-07
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Granted: 1990-09-11
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Expires: 2008-12-07
Abstract
Abstract A brake switch is provided for producing a brake signal when a brake pedal of the vehicle is depressed. A vacuum switch is provided for producing an acceleration signal when the pressure in an intake passage exceeds a predetermined value. Engine speed sensor is provided for producing an engine speed signal when the engine speed exceeds a predetermined speed. In response to the brake signal, acceleration signal and engine speed signal, a control unit operates to cut off the transmission of power of an engine and shifts the transmission to the neutral range.
Inventors
- 👤 Shunji Yamaashi
- 👤 Yoshimitsu Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:51
CPC Classifications
B; B60; B60W; B60W10/00; B60W10/04; B60W10/06; B60K; B60K23/00; B60K23/02; B60W10/10; B60W10/18; B60W30/00; B60W30/18; B60W30/1819; B60W30/188; B60W30/1884; B60W2540/00; B60W2540/12; F; F16; F16H; F16H59/00; F16H59/14; F16H59/24; F16H59/36; F16H59/50; F16H59/54; Y; Y10; Y10S; Y10S477/00; Y10S477/904; Y10S477/906
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
104 words
A power transmission system for a motor vehicle with an automatic transmission operatively connected to an engine comprising: a brake switch for producing a brake signal when a brake pedal of the vehicle is depressed; a vacuum switch for producing an acceleration signal when pressure in an intake passage exceeds a predetermined value; an engine speed sensor for producing an engine speed signal when engine speed exceeds a predetermined speed; and means responsive to the brake signal, acceleration signal and engine speed signal for cutting off transmission of power of the engine; wherein said means operates to shift the transmission to a neutral range.
Claim 2
Dependent Claim
104 words
A power transmission system for a motor vehicle with an automatic transmission operatively connected to an engine comprising: a brake switch for producing a brake signal when a brake pedal of the vehicle is depressed; a vacuum switch for producing an acceleration signal when pressure in an intake passage exceeds a predetermined value; an engine speed sensor for producing an engine speed signal when engine speed exceeds a predetermined speed; and means responsive to the brake signal, acceleration signal and engine speed signal for cutting off transmission of power of the engine; wherein said means operates to shift the transmission to a neutral range.
Claim 3
Dependent Claim
14 words
The system according to claim 1, wherein said means operates to stop the engine.
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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) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |