US3983850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for supplying fuel for acceleration during the warm-up phase of an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1975-01-03
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Granted: 1976-10-05
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Expires: 1995-01-03
Abstract
Abstract The invention relates to an apparatus for supplying fuel for acceleration during the warm-up phase of an internal combustion engine. The fuel supplied downstream of an arbitrarily actuatable throttle butterfly valve located in the induction tube of the engine being in addition to the fuel supplied by a fuel supply system. There is disclosed a motion control means which is associated with the butterfly valve and actuated thereby upon opening of this valve. The motion control means further includes electrical contacts disposed in an electrical circuit, electromagnet means in the circuit and other valve means arranged to be controlled by said electromagnet for feeding fuel into said induction tube downstream of said butterfly valve upon closing of said contacts. There are several variants of the control means; one constituted by a flexible bellows and the other by a dash pot.
Inventors
- 👤 Gerhard Stumpp
- 👤 Josef Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:03
CPC Classifications
F; F02; F02M; F02M7/00; F02M7/06; F02M7/08; Y; Y10; Y10S; Y10S261/00; Y10S261/74
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
152 words
In an internal combustion engine having a fuel system, an induction tube, and an arbitrarily actuatable throttle butterfly valve located in said induction tube and having external rotary means affixed thereto; apparatus for supplying fuel for acceleration during the warm-up phase of said engine downstream of said throttle valve, the improvement comprising motion control means associated with the butterfly valve and actuated by said rotary means upon opening of said valve, said motion control means including a flexible diaphragm bellows arranged to be actuated by a pin member, said bellows further including at one end thereof means defining an opening therein in communication with the atmosphere and at the other end thereof electrical contacts disposed in an electrical circuit, electromagnet means in said circuit and second valve means arranged to be controlled by said electromagnet for feeding fuel into said induction tube downstream of said butterfly valve upon closing of said contacts.
Claim 2
Dependent Claim
152 words
In an internal combustion engine having a fuel system, an induction tube, and an arbitrarily actuatable throttle butterfly valve located in said induction tube and having external rotary means affixed thereto; apparatus for supplying fuel for acceleration during the warm-up phase of said engine downstream of said throttle valve, the improvement comprising motion control means associated with the butterfly valve and actuated by said rotary means upon opening of said valve, said motion control means including a flexible diaphragm bellows arranged to be actuated by a pin member, said bellows further including at one end thereof means defining an opening therein in communication with the atmosphere and at the other end thereof electrical contacts disposed in an electrical circuit, electromagnet means in said circuit and second valve means arranged to be controlled by said electromagnet for feeding fuel into said induction tube downstream of said butterfly valve upon closing of said contacts.
Claim 3
Dependent Claim
26 words
An apparatus as described in claim 1, in which the said electrical circuit includes a temperature sensing switch disposed between the control means and said electromagnet.
Claim 4
Dependent Claim
89 words
An apparatus as described in claim 1, in which the motion control means includes a dash pot assembly, said dash pot assembly further including a chamber, an apertured piston having oppositely disposed surfaces positioned in said chamber, flexible means in cooperative arrangement disposed on opposite sides of said piston, split shaft means carried by said piston extending through a wall of said chamber, electrical contact means carried by each element of said split shaft means nd further flexible means interposed between the said wall and the electrical contact means.
Claim 5
Dependent Claim
54 words
An apparatus as described in claim 3, in which the said dash pot assembly further includes an actuating member arranged to cooperate with the rotary means coupled to the butterfly valve, and a first flexible means in said dash pot assembly urges the electrical contacts into a closed condition upon opening of said valve.
Claim 6
Dependent Claim
27 words
An apparatus as described in claim 3, in which the dash pot assembly further includes second flexible means to maintain the electrical contacts in an open condition.
Claim 7
Dependent Claim
39 words
An apparatus as described in claim 5 in which the dash pot assembly further includes a piston comprising axially aligned spaced walls including perforations adapted for cooperation with a reciprocable member positioned between and cooperable with said piston walls.
Claim 8
Dependent Claim
18 words
An apparatus as described in claim 2, in which the temperature sensing switch comprises a thermal time switch.
Claim 9
Dependent Claim
22 words
An apparatus as described in claim 5, in which the thermal time switch is activated by temperature of the internal combustion engine.
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) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |