US4722303A
Expired / Lapsed
US
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Method for operating an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1986-06-10
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Granted: 1988-02-02
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Expires: 2006-06-10
Abstract
Abstract A method is proposed for operating an internal combustion engine with decomposition gas generated by gasifying methanol into hydrogen and carbon monoxide in a gasification reactor. The enthalpy necessary for gasifying the methanol is obtained from the heat of the exhaust gas of the engine. To attain high efficiency and high power, the decomposition gas is injected at high pressure directly into the combustion chamber of the engine.
Inventors
- 👤 Rolf Leonhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:10
CPC Classifications
F; F02; F02B; F02B1/00; F02B1/02; F02B43/00; F02B1/04; F02B75/00; F02B75/12; F02B2075/125; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/30; Y10; Y10S; Y10S123/00; Y10S123/12
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
66 words
A method for operating a freely aspirating or supercharged internal combustion engine with a decomposition gas, generated from methanol, and intake air, comprising the steps of supplying methanol to a gasification reactor, gasifying said methanol therein using heat from exhaust gas produced by the engine, and injecting the decomposition gas at high pressure directly into the combustion chamber of the engine separately from the intake air.
Claim 2
Independent Claim
66 words
A method for operating a freely aspirating or supercharged internal combustion engine with a decomposition gas, generated from methanol, and intake air, comprising the steps of supplying methanol to a gasification reactor, gasifying said methanol therein using heat from exhaust gas produced by the engine, and injecting the decomposition gas at high pressure directly into the combustion chamber of the engine separately from the intake air.
Claim 3
Dependent Claim
20 words
A method as defined by claim 1, in which the methanol is gasified at high pressure in a gasification reactor.
Claim 4
Dependent Claim
19 words
A method as defined by claim 1, in which the gasification pressure is adapted to the gas injection pressure.
Claim 5
Dependent Claim
22 words
A method as defined by claim 3, in which the gas injection pressure is in the range from 80 to 100 bar.
Claim 6
Dependent Claim
28 words
A method as defined by claim 1, in which the decomposition gas is injected into the combustion chamber of the engine during the compression stroke of the engine.
Claim 7
Dependent Claim
28 words
A method as defined by claim 2, in which the decomposition gas is injected into the combustion chamber of the engine during the compression stroke of the engine.
Claim 8
Dependent Claim
28 words
A method as defined by claim 3, in which the decomposition gas is injected into the combustion chamber of the engine during the compression stroke of the engine.
Claim 9
Dependent Claim
28 words
A method as defined by claim 4, in which the decomposition gas is injected into the combustion chamber of the engine during the compression stroke of the engine.
Claim 10
Dependent Claim
50 words
A method as defined by claim 5, comprising the further steps of controlling a time and duration of the decomposition gas injection by a control unit that processes operating data of the engine and using said control unit to trigger a magnetic valve that meters a quantity of decomposition gas.
Claim 11
Dependent Claim
30 words
A method as defined by claim 1, comprising the further step of prior to gasification vaporizing the methanol at high pressure in a vaporizer disposed upstream of the gasification reactor.
Claim 12
Dependent Claim
30 words
A method as defined by claim 2, comprising the further step of prior to gasification vaporizing the methanol at high pressure in a vaporizer disposed upstream of the gasification reactor.
Claim 13
Dependent Claim
30 words
A method as defined by claim 3, comprising the further step of prior to gasification vaporizing the methanol at high pressure in a vaporizer disposed upstream of the gasification reactor.
Claim 14
Dependent Claim
30 words
A method as defined by claim 4, comprising the further step of prior to gasification vaporizing the methanol at high pressure in a vaporizer disposed upstream of the gasification reactor.
Claim 15
Dependent Claim
30 words
A method as defined by claim 5, comprising the further step of prior to gasification vaporizing the methanol at high pressure in a vaporizer disposed upstream of the gasification reactor.
Claim 16
Dependent Claim
30 words
A method as defined by claim 6, comprising the further step of prior to gasification vaporizing the methanol at high pressure in a vaporizer disposed upstream of the gasification reactor.
Claim 17
Dependent Claim
15 words
A method as defined by claim 10, in which said engine further includes a coolant.
Claim 18
Dependent Claim
41 words
A method as defined by claim 1, characterized in that the mixture of decomposition gas and air in the combustion chamber of the engine is ignited by high-pressure injection of readily ignitable fuel having an energy proportion of 5 to 10%.
Claim 19
Dependent Claim
42 words
A method as defined by claim 2, characterized in that the mixture of decomposition gas and air in the combustion chamber of the engine is ignited by high-pressure injection of the readily ignitable fuel having an energy proportion of 5 to 10%.
Claim 20
Dependent Claim
42 words
A method as defined by claim 3, characterized in that the mixture of decomposition gas and air in the combustion chamber of the engine is ignited by high-pressure injection of the readily ignitable fuel having an energy proportion of 5 to 10%.
Claim 21
Dependent Claim
42 words
A method as defined by claim 4, characterized in that the mixture of decomposition gas and air in the combustion chamber of the engine is ignited by high-pressure injection of the readily ignitable fuel having an energy proportion of 5 to 10%.
Claim 22
Dependent Claim
29 words
A method as defined by claim 16 comprising the further step of preheating said methanol in a heat exchanger driven by the engine coolant prior to vaporizing said methanol.
References Cited (Backward Citations)
US4567857A
Cited
US4366782A
Cited
US4425876A
Cited
US4441461A
Cited
US4476818A
Cited
US4499863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |