US4182298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warm-up control apparatus for a fuel supply system
Assignee: Robert Bosch GmbH
•
Filing: 1978-12-27
•
Granted: 1980-01-08
•
Expires: 1998-12-27
Abstract
Abstract A warm-up fuel control apparatus for an internal combustion engine including a pressure control valve for maintaining a pressure differential at a fuel proportioning valve, the pressure control valve having a moveable valve component subjected to fuel pressure on one side and urged into a valve closing position by both a pressure spring and a leaf spring on the other side together with a heat expandable element engageable with the leaf spring for removing the urging force of the leaf spring for removing the urging force of the leaf spring on the movable valve component after the warm-up phase of the engine.
Inventors
- 👤 Max Greiner
- 👤 Hermann Nusser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:03
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/16; F02M69/18; F02M69/22; F02M69/30; F02M69/36; F02M69/42; Y; Y10; Y10S; Y10S261/00; Y10S261/74
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
145 words
Warm-up control apparatus for a fuel supply system of an externally ignited internal combustion engine including a fuel apportioning valve, a pressure control valve for maintaining the pressure differential at said fuel apportioning valve, said pressure control valve having a movable valve component biased on one side by means of a fuel pressure, a first spring for biasing said movable valve component on the other side, a second spring for yieldingly urging said movable valve component into a valve closing position during the warm-up phase of the internal combustion engine and a temperature dependent element movable between an operative position in engagement with said second spring for removing the urging force of said second spring on said movable valve component after completion of the warm-up phase of said engine and an inoperative position out of said engagement with said second spring during said warm-up phase.
Claim 2
Dependent Claim
145 words
Warm-up control apparatus for a fuel supply system of an externally ignited internal combustion engine including a fuel apportioning valve, a pressure control valve for maintaining the pressure differential at said fuel apportioning valve, said pressure control valve having a movable valve component biased on one side by means of a fuel pressure, a first spring for biasing said movable valve component on the other side, a second spring for yieldingly urging said movable valve component into a valve closing position during the warm-up phase of the internal combustion engine and a temperature dependent element movable between an operative position in engagement with said second spring for removing the urging force of said second spring on said movable valve component after completion of the warm-up phase of said engine and an inoperative position out of said engagement with said second spring during said warm-up phase.
Claim 3
Dependent Claim
19 words
Warm-up control apparatus according to claim 1, further characterized in that a leaf spring serves as the second spring.
Claim 4
Dependent Claim
44 words
Warm-up control apparatus according to claim 1, including an actuating pin means on said movable valve component of said pressure control valve, said leaf spring being arranged to engage said actuating pin for yieldingly urging said movable valve component into said valve closing position.
Claim 5
Dependent Claim
24 words
Warm-up control apparatus according to claim 3, further characterized in that said actuating pin engages said leaf spring approximately at the longitudinal center thereof.
Claim 6
Dependent Claim
33 words
Warm-up control apparatus according to claim 3, further characterized in that said leaf spring is affixed at one end to a housing and includes a free end which contacts the temperature dependent element.
Claim 7
Dependent Claim
20 words
Warm-up control apparatus according to claim 1, further characterized in that said temperature dependent element includes an expansion material member.
Claim 8
Dependent Claim
22 words
Warm-up control apparatus according to claim 6, further characterized in that said expansion material member comprises a regressive characteristic temperature excursion curve.
Claim 9
Dependent Claim
33 words
Warm-up control apparatus according to claim 1, including an electrical heater winding whose current circuit is closed by means of the ignition switch and the starter switch for actuating said expansion material member.
Claim 10
Dependent Claim
28 words
Warm-up control apparatus according to claim 8, further characterized in that said current circuit of the electrical heater winding remains closed subsequent to opening of the starter switch.
References Cited (Backward Citations)
US2309170A
Cited
US3739758A
Cited
GB1406305A
Cited
DE2403276A1
Cited
FR2307136A1
Cited
DE2529701A1
Cited
DE2547645A1
Cited
US4108117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-07 | 1983-07-09 | 1984-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-07 | 1987-07-09 | 1988-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-07 | 1991-07-09 | 1992-01-08 | $7700.00 | Window Closed / Lapsed |