Patent US3748931A successfully refreshed from Google Patents.
US3748931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power train and control system
Assignee: Motors Liquidation Co
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Filing: 1971-03-29
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Granted: 1973-07-31
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Expires: 1991-03-29
Abstract
Abstract A fuel control system for use with a compression ignition engine driven transmission. Fuel pressure modified by a regulating valve responsive to an engine operating parameter is supplied to a diaphragm type motor mounted on the transmission. The output of the motor varies in response to the fuel feed position of the engine fuel control to provide a variable force torque demand signal which is imposed on the throttle valve which throttle valve supplies a control pressure in the transmission. Thus, the control pressure level of the throttle valve is controlled proportional to engine torque demand by the engine fuel control.
Inventors
- 👤 R Schaefer
- 👤 J Marlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:05
CPC Classifications
F; F16; F16H; F16H59/00; F16H59/14; F16H59/26; F16H59/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
In combination a compression ignition engine and a transmission comprising a fuel feed system having a fuel pump for supplying fuel under pressure, and fuel rack means for metering the fuel supply to the engine; pressure control valve means in fluid communication with said fuel pump and being operatively connected with said fuel rack means for generating a pressure control signal proportional to the metering position of said fuel rack means; a source of fluid pressure in said transmission; and modulator valve means including a valve element in fluid communication with said source; and diaphragm motor means in fluid communication with said pressure control valve means to impose a bias force on said valve element, said valve element emitting a control signal to said transmission in response to the bias force.
Claim 2
Dependent Claim
131 words
In combination a compression ignition engine and a transmission comprising a fuel feed system having a fuel pump for supplying fuel under pressure, and fuel rack means for metering the fuel supply to the engine; pressure control valve means in fluid communication with said fuel pump and being operatively connected with said fuel rack means for generating a pressure control signal proportional to the metering position of said fuel rack means; a source of fluid pressure in said transmission; and modulator valve means including a valve element in fluid communication with said source; and diaphragm motor means in fluid communication with said pressure control valve means to impose a bias force on said valve element, said valve element emitting a control signal to said transmission in response to the bias force.
Claim 3
Dependent Claim
197 words
In combination a compression ignition engine and a transmission comprising a fuel feed system having a fuel pump for supplying fuel under pressure, and fuel rack means for metering the fuel supply to the engine; pressure control valve means in fluid communication with said fuel pump and being operatively connected with said fuel rack means for generating a hydraulic pressure torque demand signal proportional to the metering position of said fuel rack means; a source of hydraulic pressure in said transmission; and modulator valve means including a valve element in fluid communication with said source; a control chamber adjacent one end of said valve element, a bias spring adjacent the other end of said valve element, and a modulator passage in fluid communication with said valve element and said control chamber; and diaphragm motor means having a diaphragm in fluid communication with said pressure control valve means and rod means secured to the diaphragm and abutting the one end, said valve element to impose a torque demand bias force on said valve element, said valve element emitting a torque demand control signal to said transmission in said modulator passage inversely proportional to the torque demand bias force.
Claim 4
Dependent Claim
197 words
In combination a compression ignition engine and a transmission comprising a fuel feed system having a fuel pump for supplying fuel under pressure, and fuel rack means for metering the fuel supply to the engine; pressure control valve means in fluid communication with said fuel pump and being operatively connected with said fuel rack means for generating a hydraulic pressure torque demand signal proportional to the metering position of said fuel rack means; a source of hydraulic pressure in said transmission; and modulator valve means including a valve element in fluid communication with said source; a control chamber adjacent one end of said valve element, a bias spring adjacent the other end of said valve element, and a modulator passage in fluid communication with said valve element and said control chamber; and diaphragm motor means having a diaphragm in fluid communication with said pressure control valve means and rod means secured to the diaphragm and abutting the one end, said valve element to impose a torque demand bias force on said valve element, said valve element emitting a torque demand control signal to said transmission in said modulator passage inversely proportional to the torque demand bias force.
Claim 5
Dependent Claim
197 words
In combination a compression ignition engine and a transmission comprising a fuel feed system having a fuel pump for supplying fuel under pressure, and fuel rack means for metering the fuel supply to the engine; pressure control valve means in fluid communication with said fuel pump and being operatively connected with said fuel rack means for generating a hydraulic pressure torque demand signal proportional to the metering position of said fuel rack means; a source of hydraulic pressure in said transmission; and modulator valve means including a valve element in fluid communication with said source; a control chamber adjacent one end of said valve element, a bias spring adjacent the oTher end of said valve element, and a modulator passage in fluid communication with said valve element and said control chamber; and diaphragm motor means having a diaphragm in fluid communication with said pressure control valve means and rod means secured to the diaphragm and abutting one end of said bias spring to impose a torque demand bias force on said valve element, said valve element emitting a torque demend control signal to said transmission in said modulator passage directly proportional to the torque demand bias force.
Claim 6
Dependent Claim
197 words
In combination a compression ignition engine and a transmission comprising a fuel feed system having a fuel pump for supplying fuel under pressure, and fuel rack means for metering the fuel supply to the engine; pressure control valve means in fluid communication with said fuel pump and being operatively connected with said fuel rack means for generating a hydraulic pressure torque demand signal proportional to the metering position of said fuel rack means; a source of hydraulic pressure in said transmission; and modulator valve means including a valve element in fluid communication with said source; a control chamber adjacent one end of said valve element, a bias spring adjacent the oTher end of said valve element, and a modulator passage in fluid communication with said valve element and said control chamber; and diaphragm motor means having a diaphragm in fluid communication with said pressure control valve means and rod means secured to the diaphragm and abutting one end of said bias spring to impose a torque demand bias force on said valve element, said valve element emitting a torque demend control signal to said transmission in said modulator passage directly proportional to the torque demand bias force.
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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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |