US3727486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine having improved performance characteristics
Assignee: Perkins Ltd
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Filing: 1971-02-11
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Granted: 1973-04-17
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Expires: 1991-02-11
Abstract
Abstract A pressure charged engine and gearbox assembly providing a number of drive ratios and including means which, on selection of certain of the gears below the top gear, conditions the fuelling apparatus of the engine to provide more fuel at the same engine speed than it does in top gear. The presence of pressure charged air enables the fuel to be burnt efficiently and extra power is made available by virtue of the higher brake means effective pressure so produced.
Inventors
- 👤 N Vulliamy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:03
CPC Classifications
B; B60; B60W; B60W30/00; B60W30/18; B60W10/00; B60W10/04; B60W10/10; B60W10/11; B60W30/1819; F; F16; F16H; F16H61/00; F16H2061/0015
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A motor vehicle power unit and transmission, comprising an internal combustion engine, a variable delivery fuelling device, change-speed gears, a gear-ratio selecting mechanism, an intermediate portion of said selecting mechanism for selection of intermediate gear ratios only, and fuelling control means connected to said intermediate portion of said selecting mechanism and to said fuelling device to adjust the maximum deliverable quantity of fuel upward and allow greater quantities of fuel to said internal combustion engine for increased power when operating in an intermediate gear ratio over that when operating in either low or high gear ratios.
Claim 2
Dependent Claim
96 words
A motor vehicle power unit and transmission, comprising an internal combustion engine, a variable delivery fuelling device, change-speed gears, a gear-ratio selecting mechanism, an intermediate portion of said selecting mechanism for selection of intermediate gear ratios only, and fuelling control means connected to said intermediate portion of said selecting mechanism and to said fuelling device to adjust the maximum deliverable quantity of fuel upward and allow greater quantities of fuel to said internal combustion engine for increased power when operating in an intermediate gear ratio over that when operating in either low or high gear ratios.
Claim 3
Dependent Claim
17 words
A power unit and transmission according to claim 1 wherein said engine is a compression ignition engine.
Claim 4
Dependent Claim
24 words
A power unit and transmission according to claim 1 wherein said change-speed gears and said selecting mechanism together constitute a multi-ratio automatic gear box.
Claim 5
Dependent Claim
40 words
A power unit and transmission according to claim 1 including a supercharger supplying additional air over that otherwise available to enable more complete combustion of the additional fuel supplied by virtue of said fuelling control means adjusting said fuelling device.
Claim 6
Dependent Claim
37 words
A power unit and transmission according to claim 4 wherein said supercharger includes an exhaust-driven turbine capable of receiving the exhaust of the additional fuel supplied as a result of the use of said fuelling control means.
Claim 7
Dependent Claim
30 words
A power unit and transmission according to claim 1 wherein said fuelling control means includes an actuator capable of adjusting the upper fuel flow limit of said fuelling device upward.
Claim 8
Dependent Claim
48 words
A power unit and transmission according to claim 6 wherein said fuelling control means further includes a sensor capable of sensing activation of said portion of said selecting mechanism upon selection of an intermediate gear ratio, said sensor signalling said actuator to cause activation of said fuelling device.
Claim 9
Dependent Claim
61 words
A power unit and transmission according to claim 7 wherein said fuelling control means includes a fuel injection pump, at least one valve on said pump for fuel flow control, and said actuator is a pilot on said valve, said pilot capable of shifting said valve causing increased flow of fuel to said engine over that otherwise provided by said pump.
Claim 10
Dependent Claim
64 words
A power unit and transmission according to claim 7 wherein said fuelling control means includes a fuel injection pump, a control rod on said pump for metering flow to said engine, and said sensor and actuator are an electrical switch and a solenoid, respectively, said solenoid capable of removing a mechanical constraint on said control rod to permit increased fuel flow to said engine.
Claim 11
Dependent Claim
65 words
A power unit and transmission according to claim 7 wherein said fuelling control means includes a fuel injection pump, a logic control unit on said pump with a variable orifice for controlling fuel flow to said engine, and said sensor and actuator are a pressure switch and signal receiving variable orifice control within said logic unit, respectively, said orifice control capable of adjusting the orifice.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |