Patent US6375159B2 successfully refreshed from Google Patents.
US6220522B1
Expired / Lapsed
US
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Internal combustion engine having combustion heater
Assignee: Toyota Motor Corp
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Filing: 1999-03-08
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Granted: 2001-04-24
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Expires: 2019-03-08
Abstract
Abstract An internal combustion engine having a combustion heater capable of simply preventing thermal damages to structures of intake system of the internal combustion engine, enhancing a starting characteristic of the engine in a low-temperature state, even when a compression ratio of the internal combustion engine is decreased, and speeding up of warming of an oil. The combustion heater is connected via a combustion gas introducing passageway to an intake pipe, whereby a combustion gas emitted from the combustion heater is introduced into the intake system via the combustion gas introducing passageway. In introducing the combustion gas, an exhaust gas cooler is arranged in the combustion gas introducing passageway for cooling off the combustion gas flowing therethrough. A bypass passageway is connected astride the exhaust gas cooler in bypass to the combustion gas introducing passageway. Also a passageway switching device is provided for guiding the combustion gas of the combustion heater to an engine body at the time of starting the engine when an outside air temperature is about 15° C. or below. The engine oil is warmed by the heat radiated from the exhaust gas cooler and received by the oil cooler.
Inventors
- 👤 Makoto Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:48
CPC Classifications
F; F01; F01P; F01P3/00; F01P3/20; F02; F02B; F02B29/00; F02M; F02M31/00; F02M31/02; F02M31/04; F02M31/042; F28; F28D; F28D7/00; F28D7/10; F28D7/106; F01P2060/00; F01P2060/04; F01P2060/08; F01P2060/18; F28D21/00; F28D21/0001; F28D21/0003; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
An internal combustion engine having a combustion heater which operates when said internal combustion engine is in a predetermined operating state, and enhancing a performance of a temperature raising device with a heat transmission fluid serving as a thermal source, by warming the heat transmission fluid by the combustion heater, said engine comprising: a combustion gas introducing passageway, which connects said combustion heater to an intake system of said internal combustion engine, for introducing a combustion gas emitted from said combustion heater into said intake system; and a cooling device for cooling the combustion gas flowing through said combustion gas introducing passageway.
Claim 2
Dependent Claim
102 words
An internal combustion engine having a combustion heater which operates when said internal combustion engine is in a predetermined operating state, and enhancing a performance of a temperature raising device with a heat transmission fluid serving as a thermal source, by warming the heat transmission fluid by the combustion heater, said engine comprising: a combustion gas introducing passageway, which connects said combustion heater to an intake system of said internal combustion engine, for introducing a combustion gas emitted from said combustion heater into said intake system; and a cooling device for cooling the combustion gas flowing through said combustion gas introducing passageway.
Claim 3
Dependent Claim
33 words
An internal combustion engine having a combustion heater according to claim 1 , wherein said temperature raising device is a car room heater for raising a temperature within a room of a vehicle.
Claim 4
Dependent Claim
23 words
An internal combustion engine having a combustion heater according to claim 1 , wherein the heat transmission fluid is an engine cooling water.
Claim 5
Dependent Claim
36 words
An internal combustion engine having a combustion heater according to claim 3 , wherein said cooling device cools off the combustion gas by radiating the heat held by the combustion gas to the engine cooling water.
Claim 6
Dependent Claim
45 words
An internal combustion engine having a combustion heater according to claim 3 , wherein said cooling device transmits the heat of the combustion gas of said combustion heater to the engine cooling water via an external wall of the body of said internal combustion engine.
Claim 7
Dependent Claim
75 words
An internal combustion engine having a combustion heater according to claim 1 , further comprising: a bypass passageway connected in bypass to said combustion gas introducing passageway with respect to said cooling device; and a passageway switching device for guiding the combustion gas of said combustion heater to said internal combustion engine body via said bypass passageway when the internal combustion engine is in the predetermined operating state and at the time of starting thereof.
Claim 8
Dependent Claim
57 words
An internal combustion engine having a combustion heater according to claim 4 , further comprising: a heat exchange device for transmitting the heat received by the engine cooling water from said cooling device to a lubricating oil of said internal combustion engine, and thereby transferring the heat held by the engine cooling water to the lubricating oil.
Claim 9
Dependent Claim
45 words
An internal combustion engine having a combustion heater according to claim 7 , wherein said heat exchange device is disposed in a circulation passageway for connecting said cooling device to a water jacket of said internal combustion engine provided, at downstream of said cooling device.
Claim 10
Dependent Claim
22 words
An internal combustion engine having a combustion heater according to claim 8 , wherein said heat exchange device is an oil cooler.
References Cited (Backward Citations)
US2290300A
Cited
FR1497428A
Cited
US3526214A
Cited
US4176651A
Cited
FR2381175A1
Cited
US4212162A
Cited
GB1595060A
Cited
GB2041081A
Cited
JPS55160158A
Cited
SU918466A1
Cited
JPS60224614A
Cited
US4858825A
Cited
JPS6275069A
Cited
JPS6299414U
Cited
US4836445A
Cited
EP0271999A1
Cited
US5377440A
Cited
US5402757A
Cited
JPH06222867A
Cited
JPH06222360A
Cited
US5641016A
Cited
DE4411959A1
Cited
FR2776026A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-04-23 | 2004-10-23 | 2005-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-04-23 | 2008-10-23 | 2009-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-04-23 | 2012-10-23 | 2013-04-24 | $7700.00 | Window Closed / Lapsed |