US3608531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection
Assignee: Federal Mogul Coventry Ltd
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Filing: 1969-06-23
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Granted: 1971-09-28
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Expires: 1989-06-23
Abstract
Abstract The present invention relates to a fuel injection system for internal combustion engines. The system comprises at least one electromagnetically operated fuel injector for the injection of fuel into the induction pipe or manifold of the engine and means to provide a supply of exhaust gas from the engine to assist in atomization of the fuel. The flow of the exhaust gas is caused by the pressure differential between the exhaust gas pressure and the depression in the induction pipe or manifold. The fuel pressure to the injectors is adjusted as a function of the pressure of the exhaust gas to provide compensation for variations in fuel flow arising from changes in the pressure of the exhaust gas supply.
Inventors
- 👤 Albert E Baxendale
- 👤 Brian H Croft
- 👤 George E Fowle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:16
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A fuel injection system for an internal combustion engine, including a plurality of electromagnetically operated fuel injectors for the injection of fuel into the induction pipe or manifold of the engine and means to provide a supply of exhaust gas of the engine to assist in atomization of said fuel, the flow of said exhaust gas being caused by the pressure difference between the exhaust gas pressure and the depression in said induction pipe or manifold, the injectors being fed with fuel under pressure from a fuel supply through a common supply line and including a return line to the fuel supply fed through a pressure control valve which determines the fuel pressure in said supply line, wherein the pressure control valve is also subjected to a reference pressure which is the same as the pressure of the exhaust gas fed to the injectors, whereby the reference pressure acts on the pressure control valve to alter the pressure of the fuel supply to the injectors in such a way as to provide compensation for variations in fuel flow arising from changes in the pressure of the exhaust gas supply.
Claim 2
Dependent Claim
189 words
A fuel injection system for an internal combustion engine, including a plurality of electromagnetically operated fuel injectors for the injection of fuel into the induction pipe or manifold of the engine and means to provide a supply of exhaust gas of the engine to assist in atomization of said fuel, the flow of said exhaust gas being caused by the pressure difference between the exhaust gas pressure and the depression in said induction pipe or manifold, the injectors being fed with fuel under pressure from a fuel supply through a common supply line and including a return line to the fuel supply fed through a pressure control valve which determines the fuel pressure in said supply line, wherein the pressure control valve is also subjected to a reference pressure which is the same as the pressure of the exhaust gas fed to the injectors, whereby the reference pressure acts on the pressure control valve to alter the pressure of the fuel supply to the injectors in such a way as to provide compensation for variations in fuel flow arising from changes in the pressure of the exhaust gas supply.
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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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |