US4141330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulating valve for fuel injection systems
Assignee: Robert Bosch GmbH
•
Filing: 1977-05-19
•
Granted: 1979-02-27
•
Expires: 1997-05-19
Abstract
Abstract There is proposed a pressure regulating valve for a fuel injection system which serves to regulate the heating-up fuel amount for an explosion, external auto-ignition, internal combustion engine. The pressure regulating valve comprises a movable valve component which is urged in the closing direction by a pressure spring which during the heating-up phase acts against a temperature responsive element which in turn acts with a force that can be influenced by another temperature responsive electrically heatable element so that during the heating-up phase the air-fuel mixture can be proportioned in accordance with the requirements of each internal combustion engine.
Inventors
- 👤 Walter Schlott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:03
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/30; F02M69/36; F02M69/38; F02M69/386
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
A pressure regulating valve for a fuel injection system for a mixture-compressing, externally ignited, internal combustion engine having a suction duct including an air-flow sensor member which is displaced by the amount of air flowing through it against the restoring force produced by a pressure fluid, said pressure fluid being continuously conveyed to a control pressure conduit under constant pressure and changeable at will by means of said pressure regulating valve, said pressure regulating valve further including a movable valve component one side of which is under the action of said pressure fluid and the other side thereof being under the action of a pressure spring with the force of the pressure spring being decreasable by a first temperature-responsive element further characterized in that a second temperature responsive element is arranged in said pressure regulating valve for engagement with said first temperature-responsive element so that said second temperature-responsive element acts in the direction of reducing the force of said first temperature-responsive element on the pressure spring.
Claim 2
Dependent Claim
166 words
A pressure regulating valve for a fuel injection system for a mixture-compressing, externally ignited, internal combustion engine having a suction duct including an air-flow sensor member which is displaced by the amount of air flowing through it against the restoring force produced by a pressure fluid, said pressure fluid being continuously conveyed to a control pressure conduit under constant pressure and changeable at will by means of said pressure regulating valve, said pressure regulating valve further including a movable valve component one side of which is under the action of said pressure fluid and the other side thereof being under the action of a pressure spring with the force of the pressure spring being decreasable by a first temperature-responsive element further characterized in that a second temperature responsive element is arranged in said pressure regulating valve for engagement with said first temperature-responsive element so that said second temperature-responsive element acts in the direction of reducing the force of said first temperature-responsive element on the pressure spring.
Claim 3
Dependent Claim
43 words
A pressure regulating valve as claimed in claim 1, further characterized in that an electrical heating coil is associated with said further temperature-responsive element and the circuit of the coil being closed by the ignition and start switches of the internal combustion engine.
Claim 4
Dependent Claim
21 words
A pressure regulating valve as claimed in claim 2, further characterized in that said temperature responsive elements comprise bimetallic spring means.
Claim 5
Dependent Claim
29 words
A pressure regulating valve as claimed in claim 3, characterized in that said first bimetallic spring means and said second bimetallic spring means have an adjustable insert interposed therebetween.
Claim 6
Dependent Claim
50 words
A pressure regulating valve as claimed in claim 4, further characterized in that said first and said second bimetallic spring means are arranged to cooperate with a transmission spring with said first and second bimetallic spring means being in contact above a predetermined temperature by means of said adjustable insert.
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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |