US3748931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power train and control system
Assignee: Motors Liquidation Co
•
Filing: 1971-03-29
•
Granted: 1973-07-31
•
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 19:20
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.
References Cited (Backward Citations)
US2874585A
Cited
FR1222264A
Cited
US2976685A
Cited
US3139875A
Cited
US3119381A
Cited
US3371479A
Cited
US3490538A
Cited
DE1904702A1
Cited
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 |