Patent US3678473A successfully refreshed from Google Patents.
US3581852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine and parking brake controlled by transmission ratio and engine temperature
Assignee: Motors Liquidation Co
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Filing: 1969-10-17
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Granted: 1971-06-01
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Expires: 1989-10-17
Abstract
Abstract A vacuum control system having hydraulic- and temperatureactuated control valves. The control valves direct vacuum signals from the engine inlet manifold to the ignition distributor, the idle speed control and the vehicle-parking brake under specific conditions. The control valves are operated automatically such that when the vehicle transmission is in high gear normal ignition spark advance will occur, when the transmission is conditioned for other than high gear and the engine temperature is above a predetermined value normal ignition spark advance will occur, when the transmission is shifted from neutral or park to forward or reverse drive the parking brake will be released, and when the transmission is in neutral or park and the engine temperature is above the predetermined temperature, the engine idle speed will be increased.
Inventors
- 👤 Thomas J Griffen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:38
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/103; B60T11/105; F; F02; F02P; F02P5/00; F02P5/04; F02P5/05; F02P5/10; F02P5/103; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
273 words
A temperature and hydraulically actuated vacuum control system for use with a water-cooled internal combustion engine having an inlet manifold, an idle control, a distributor, and a cooling radiator, and driving a hydrodynamic transmission having high and low forward drives, a reverse drive, a neutral condition and a park condition, said control system including a temperature-actuated vacuum valve operatively connected to the radiator and operable to open above a predetermined temperature; a first hydraulically actuated vacuum valve; a second hydraulically actuated vacuum valve; first vacuum passage means for connecting the inlet manifold with said vacuum valves; second vacuum passage means connecting the distributor with said temperature-actuated vacuum valve and said first hydraulically actuated vacuum valve; third vacuum passage means connecting said second hydraulically actuated vacuum valve with said temperatureactuated vacuum valve; fourth vacuum passage means connecting said temperature-actuated vacuum valve with the idle control; first hydraulic passage means connecting the transmission with said first hydraulically actuated vacuum valve for providing a hydraulic signal thereto when the transmission is in the high forward drive; and second hydraulic passage means connecting the transmission with said second hydraulically actuated vacuum valve for providing a hydraulic signal thereto when said transmission is in the forward or reverse drive; whereby when said transmission is in high forward drive the distributor will receive a vacuum ignition advance signal, when said transmission is in the low forward drive and the temperature-actuated vacuum valve is open, the distributor will receive a vacuum ignition advance signal, and when the transmission is in neutral or park and the temperature-actuated vacuum valve is open, the idle control will receive an idle increase vacuum signal.
Claim 2
Dependent Claim
273 words
A temperature and hydraulically actuated vacuum control system for use with a water-cooled internal combustion engine having an inlet manifold, an idle control, a distributor, and a cooling radiator, and driving a hydrodynamic transmission having high and low forward drives, a reverse drive, a neutral condition and a park condition, said control system including a temperature-actuated vacuum valve operatively connected to the radiator and operable to open above a predetermined temperature; a first hydraulically actuated vacuum valve; a second hydraulically actuated vacuum valve; first vacuum passage means for connecting the inlet manifold with said vacuum valves; second vacuum passage means connecting the distributor with said temperature-actuated vacuum valve and said first hydraulically actuated vacuum valve; third vacuum passage means connecting said second hydraulically actuated vacuum valve with said temperatureactuated vacuum valve; fourth vacuum passage means connecting said temperature-actuated vacuum valve with the idle control; first hydraulic passage means connecting the transmission with said first hydraulically actuated vacuum valve for providing a hydraulic signal thereto when the transmission is in the high forward drive; and second hydraulic passage means connecting the transmission with said second hydraulically actuated vacuum valve for providing a hydraulic signal thereto when said transmission is in the forward or reverse drive; whereby when said transmission is in high forward drive the distributor will receive a vacuum ignition advance signal, when said transmission is in the low forward drive and the temperature-actuated vacuum valve is open, the distributor will receive a vacuum ignition advance signal, and when the transmission is in neutral or park and the temperature-actuated vacuum valve is open, the idle control will receive an idle increase vacuum signal.
Claim 3
Dependent Claim
400 words
A temperature and hydraulically actuated vacuum control system for use with a vehicle having a parking brake and a water-cooled internal combustion engine having a inlet manifold, an idle control, a distributor, and a cooling radiator, and driving a hydrodynamic transmission having high, intermediate, and low forward drives, a reverse drive, a neutral condition and a park condition, said control system including temperature-actuated vacuum valve means operatively connected to the radiator having two normally closed ports and being operable to open above a predetermined temperature; first hydraulically actuated vacuum valve means having a normally closed port and being operable in response to a hydraulic signal to open; second hydraulically actuated vacuum valve means having a normally open port and a normally closed port and being operable to close the open port and open the closed port in response to a hydraulic signal; first vacuum passage means for connecting the inlet manifold with all of said vacuum valves; second vacuum passage means connecting the distributor with said temperature-actuated vacuum valve and said first hydraulically actuated vacuum valve; third vacuum passage means connecting said second hydraulically actuated vacuum valve with said temperature-actuated vacuum valve; fourth vacuum passage means connecting said temperature-actuated vacuum valve with the idle control; fifth vacuum passage means connecting said second hydraulically actuated vacuum valve with the parking brake; first hydraulic passage means connecting the transmission with said first hydraulically actuated vacuum valve for providing a hydraulic signal thereto when the transmission is in the high forward drive to open the vacuum to permit a vacuum ignition advance signal to be distributed to the distributor; and second hydraulic passage means connecting the transmission with said second hydraulically actuated vacuum valve for providing a hydraulic signal thereto when said transmission is in the forward or reverse drive to open the normally closed port thereof to permit a vacuum signal to be directed to the parking brake for release thereof; whereby when said transmission is in high forward drive the distributor will receive a vacuum ignition advance signal, when said transmission is in the low and intermediate forward drive and the temperature-actuated vacuum valve is open, the distributor will receive a vacuum ignition advance signal, and when the transmission is in neutral or park and the temperature-actuated vacuum valve is open, the idle control will receive an idle increase vacuum signal and the distributor will receive a vacuum ignition advance signal.
Claim 4
Dependent Claim
400 words
A temperature and hydraulically actuated vacuum control system for use with a vehicle having a parking brake and a water-cooled internal combustion engine having a inlet manifold, an idle control, a distributor, and a cooling radiator, and driving a hydrodynamic transmission having high, intermediate, and low forward drives, a reverse drive, a neutral condition and a park condition, said control system including temperature-actuated vacuum valve means operatively connected to the radiator having two normally closed ports and being operable to open above a predetermined temperature; first hydraulically actuated vacuum valve means having a normally closed port and being operable in response to a hydraulic signal to open; second hydraulically actuated vacuum valve means having a normally open port and a normally closed port and being operable to close the open port and open the closed port in response to a hydraulic signal; first vacuum passage means for connecting the inlet manifold with all of said vacuum valves; second vacuum passage means connecting the distributor with said temperature-actuated vacuum valve and said first hydraulically actuated vacuum valve; third vacuum passage means connecting said second hydraulically actuated vacuum valve with said temperature-actuated vacuum valve; fourth vacuum passage means connecting said temperature-actuated vacuum valve with the idle control; fifth vacuum passage means connecting said second hydraulically actuated vacuum valve with the parking brake; first hydraulic passage means connecting the transmission with said first hydraulically actuated vacuum valve for providing a hydraulic signal thereto when the transmission is in the high forward drive to open the vacuum to permit a vacuum ignition advance signal to be distributed to the distributor; and second hydraulic passage means connecting the transmission with said second hydraulically actuated vacuum valve for providing a hydraulic signal thereto when said transmission is in the forward or reverse drive to open the normally closed port thereof to permit a vacuum signal to be directed to the parking brake for release thereof; whereby when said transmission is in high forward drive the distributor will receive a vacuum ignition advance signal, when said transmission is in the low and intermediate forward drive and the temperature-actuated vacuum valve is open, the distributor will receive a vacuum ignition advance signal, and when the transmission is in neutral or park and the temperature-actuated vacuum valve is open, the idle control will receive an idle increase vacuum signal and the distributor will receive a vacuum ignition advance signal.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |