US3589344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection arrangement for internal combustion engines
Assignee: Robert Bosch GmbH
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Filing: 1969-02-07
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Granted: 1971-06-29
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Expires: 1989-02-07
Abstract
Abstract An arrangement in which fuel is inhibited from being injected into the combustion chamber of an internal combustion engine when the engine is operated at idling speed or low load conditions. Fuel is injected into the engine through an electromagnetically controlled fuel injection valve which is opened by an electrical pulse during the fuel injection process. Electrical pulses from a pulse emitter are inhibited by a gating circuit for at least every second fuel injection process when the engine is at idling speed or driving a substantially small load. The operating state of the engine is automatically established through a pressure sensing device within the air intake manifold of the engine. The pressure-sensing device actuates the gating circuitry when the pressure within the air intake manifold is within a predetermined pressure region.
Inventors
- 👤 Leo Steinke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:46
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/08; F02B; F02B53/00; F02B53/10; F02D17/00; F02D17/02; F02B2053/005; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B2730/00; F02B2730/01; F02B2730/018; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
127 words
An internal combustion engine comprising, in combination, a housing; piston means movable within said housing and forming a combustion chamber; air supply means for supplying air to said combustion chamber; fuel injection means for injecting fuel into said chamber to be intermixed with said air when actuated by an electrical pulse; pulse emitting means connected to said fuel injection means and applying pulses to said injection means; and electronic pulse-inhibiting means connected between said fuelinjecting means and said pulse emitting means for inhibiting the application of a pulse to said fuel injection means for at least every second fuel injection process during idling of said engine, so that the fuel-free air within said chamber upon inhibiting injection of fuel into said chamber scavenges and cleanses said chamber.
Claim 2
Dependent Claim
127 words
An internal combustion engine comprising, in combination, a housing; piston means movable within said housing and forming a combustion chamber; air supply means for supplying air to said combustion chamber; fuel injection means for injecting fuel into said chamber to be intermixed with said air when actuated by an electrical pulse; pulse emitting means connected to said fuel injection means and applying pulses to said injection means; and electronic pulse-inhibiting means connected between said fuelinjecting means and said pulse emitting means for inhibiting the application of a pulse to said fuel injection means for at least every second fuel injection process during idling of said engine, so that the fuel-free air within said chamber upon inhibiting injection of fuel into said chamber scavenges and cleanses said chamber.
Claim 3
Dependent Claim
47 words
The internal combustion engine as defined in claim 1 wherein said pulse-inhibiting means comprises an electronic gate for gating and inhibiting the transmission of said pulses from said pulse-emitting means to said fuel-injecting means for at least every second fuel injection process during idling of said engine.
Claim 4
Dependent Claim
22 words
The internal combustion engine as defined in claim 1 wherein said piston means comprises a rotatable piston with three triangle convex-shaped sides.
Claim 5
Dependent Claim
38 words
The internal combustion engine as defined in claim 1 including pressure-sensing means for sensing the air pressure within said air supply means and controlling said pulse-inhibiting means as a function of the pressure within said air supply means.
Claim 6
Dependent Claim
74 words
The internal combustion engine as defined in claim 4 wherein said pulse-inhibiting means comprises an eLectronic counter connected to said pressure-sensing means and actuated by a signal from said pressure-sensing means; and pulse-gating means connected to the output of said counter means and to said pulse-emitting means for inhibiting the transmission of pulses from said pulse-emitting means to said fuel-injecting means for at least every second fuel injection process during idling of said engine.
Claim 7
Dependent Claim
17 words
The internal combustion engine as defined in claim 5 wherein said gating means comprises an AND gate.
Claim 8
Dependent Claim
54 words
The internal combustion engine as defined in claim 5 wherein said gating means comprises an AND gate having one input connected to the output of said electronic counter means and a second input connected to the output of said pulse emitting means, the output of said gating means being connected to said fuel-injecting means.
Claim 9
Dependent Claim
55 words
The internal combustion engine as defined in claim 1 including pressure-sensing means within said air supply means and connected to said pulse inhibiting means for inhibiting the transmission of pulses from said pulse emitting means to said fuel injecting means when the air pressure within said air supply means is within a predetermined pressure region.
Claim 10
Dependent Claim
46 words
The internal combustion engine as defined in claim 1, wherein said housing has an inner surface of substantially oval shape and wherein said piston means comprises a piston rotatably arranged within said housing and having circumferentially spaced surface portions engaging said inner surface of said housing.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |