US4026168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas purification system
Assignee: Toyota Motor Corp
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Filing: 1976-04-09
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Granted: 1977-05-31
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Expires: 1996-04-09
Abstract
Abstract There is disclosed an exhaust gas purifying system adapted for use with an automotive vehicle having an automatic transmission. The system includes a device for preventing the return of a throttle valve to the idling position. A switch is closed when a shift lever is in a predetermined range so that the position control device may be actuated to prevent the throttle valve from being returned to the idling position when the speed of the vehicle or the negative pressure in the intake manifold is in excess of a predetermined magnitude. Emission of pollutants may be decreased, and safe driving is insured.
Inventors
- 👤 Nobuyuki Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:15
CPC Classifications
F; F02; F02M; F02M3/00; F02M3/06; F02M3/07; B; B60; B60W; B60W10/00; B60W10/04; B60W10/10; B60W30/00; B60W30/18; B60W30/1819; F02D; F02D41/00; F02D41/0002; F02D41/0005; F16; F16H; F16H61/00; F16H2061/0018; F16H59/00; F16H59/68; F16H59/70; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
258 words
In an automobile having an automatic transmission with a selector system having a plurality of positions including a drive position, an intake manifold, a normally closed throttle valve, accelerator means for moving the throttle valve to an open position and a throttle valve stop mechanism, the improvement that comprises means normally biasing said throttle valve stop mechanism to a position permitting the throttle valve to return to the idling position when the selector is in a position other than the drive position and the accelerator means is in repose, said means comprising a vacuum line between said intake manifold and said biasing means, the biasing means being responsive to vacuum in said line to overcome the biasing means and to move said stop mechanism to a position preventing said throttle valve from returning to the idling position when the selector is in the drive position and the accelerator means is in repose and means responsive to the engine vacuum and the position of said selector to block said vacuum line, said blocking means comprising a normally closed solenoid valve, and an electrical circuit to control said solenoid including a switch actuated by the selector system, said circuit being connected so that the solenoid blocks the vacuum line in response to the position of the selector system; a vacuum control valve actuated by the level of engine vacuum and connected between said solenoid valve and the engine intake manifold so that solenoid valve is connected to the manifold only when its vacuum is in excess of a predetermined magnitude.
Claim 2
Dependent Claim
258 words
In an automobile having an automatic transmission with a selector system having a plurality of positions including a drive position, an intake manifold, a normally closed throttle valve, accelerator means for moving the throttle valve to an open position and a throttle valve stop mechanism, the improvement that comprises means normally biasing said throttle valve stop mechanism to a position permitting the throttle valve to return to the idling position when the selector is in a position other than the drive position and the accelerator means is in repose, said means comprising a vacuum line between said intake manifold and said biasing means, the biasing means being responsive to vacuum in said line to overcome the biasing means and to move said stop mechanism to a position preventing said throttle valve from returning to the idling position when the selector is in the drive position and the accelerator means is in repose and means responsive to the engine vacuum and the position of said selector to block said vacuum line, said blocking means comprising a normally closed solenoid valve, and an electrical circuit to control said solenoid including a switch actuated by the selector system, said circuit being connected so that the solenoid blocks the vacuum line in response to the position of the selector system; a vacuum control valve actuated by the level of engine vacuum and connected between said solenoid valve and the engine intake manifold so that solenoid valve is connected to the manifold only when its vacuum is in excess of a predetermined magnitude.
Claim 3
Dependent Claim
23 words
The improvement of claim 1 in which the solenoid valve is responsive to location of the drive selector in positions other than drive.
Claim 4
Dependent Claim
244 words
In an automobile having an automatic transmission with a selector system having a plurality of positions including a drive position, an intake manifold, a normally closed throttle valve, accelerator means for moving the throttle valve to an open position and a throttle valve stop mechanism, the improvement that comprises means normally biasing said throttle valve stop mechanism to a position permitting the throttle valve to return to the idling position when the selector is in a position other than the drive position and the accelerator means is in repose, said means comprising a vacuum line between said intake manifold and said biasing means, the biasing means being responsive to vacuum in said line to overcome the biasing means and to move said stop mechanism to a position preventing said throttle valve from returning to the idling position when the selector is in the drive position and the accelerator means is in repose and means responsive to the vehicle speed and the position of said selector to block said vacuum line, said blocking means comprising a normally open solenoid actuated valve, and an electrical circuit to control said solenoid including a vehicle speed detector means connected to open a switch in the circuit when the vehicle speed falls below a predetermined value and a switch actuated by the selector system, said circuit being connected so that the solenoid blocks the vacuum line in response to the vehicle speed and the position of the selector system.
Claim 5
Dependent Claim
244 words
In an automobile having an automatic transmission with a selector system having a plurality of positions including a drive position, an intake manifold, a normally closed throttle valve, accelerator means for moving the throttle valve to an open position and a throttle valve stop mechanism, the improvement that comprises means normally biasing said throttle valve stop mechanism to a position permitting the throttle valve to return to the idling position when the selector is in a position other than the drive position and the accelerator means is in repose, said means comprising a vacuum line between said intake manifold and said biasing means, the biasing means being responsive to vacuum in said line to overcome the biasing means and to move said stop mechanism to a position preventing said throttle valve from returning to the idling position when the selector is in the drive position and the accelerator means is in repose and means responsive to the vehicle speed and the position of said selector to block said vacuum line, said blocking means comprising a normally open solenoid actuated valve, and an electrical circuit to control said solenoid including a vehicle speed detector means connected to open a switch in the circuit when the vehicle speed falls below a predetermined value and a switch actuated by the selector system, said circuit being connected so that the solenoid blocks the vacuum line in response to the vehicle speed and the position of the selector system.
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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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |