US4774910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine cooling system
Assignee: Honda Motor Co Ltd
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Filing: 1986-10-21
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Granted: 1988-10-04
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Expires: 2006-10-21
Abstract
Abstract An engine cooling system for cooling an internal combustion engine on a motor vehicle such as an automobile, for example, includes an engine stop detector for detecting when the operation of the engine is stopped, an oil temperature detector for detecting the temperature of lubricating oil in the engine, a controller responsive to signals from the engine stop detector and the oil temperature detector for ascertaining whether the temperature of the lubricating oil at the time the engine is stopped is in excess of a reference temperature or not and for issuing a control signal when the temperature of the lubricating oil exceeds the reference temperature, and a fan driver for driving an engine cooling fan in response to the control signal from the controller.
Inventors
- 👤 Yasuyuki Aihara
- 👤 Shinichi Kubota
- 👤 Syunzaburo Ozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:13
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/14; F01M; F01M11/00; F01M11/10; F01P7/00; F01P7/02; F01P7/08; F01P2031/00; F01P2031/30; F02; F02F; F02F7/00; F02F7/006; F16; F16N; F16N2250/00; F16N2250/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
141 words
An engine cooling system for cooling an internal combustion engine having a liquid coolant circulating system with a radiator and at least one engine cooling fan, comprising: engine stop detector means for detecting when the operation of the engine is stopped; oil temperature detector means for detecting the temperature of lubricating oil in the engine; controller means responsive to signals from said engine stop detector means and said oil temperature detector means for ascertaining whether the temperature of the lubricating oil at the time the engine is stopped is in excess of a reference temperature which may result in fuel percolation and vapor lock and for issuing a control signal when the temperature of the lubricating oil exceeds said reference temperature; and fan driver means for driving the engine cooling fan in response to the control signal from said controller means.
Claim 2
Dependent Claim
141 words
An engine cooling system for cooling an internal combustion engine having a liquid coolant circulating system with a radiator and at least one engine cooling fan, comprising: engine stop detector means for detecting when the operation of the engine is stopped; oil temperature detector means for detecting the temperature of lubricating oil in the engine; controller means responsive to signals from said engine stop detector means and said oil temperature detector means for ascertaining whether the temperature of the lubricating oil at the time the engine is stopped is in excess of a reference temperature which may result in fuel percolation and vapor lock and for issuing a control signal when the temperature of the lubricating oil exceeds said reference temperature; and fan driver means for driving the engine cooling fan in response to the control signal from said controller means.
Claim 3
Dependent Claim
33 words
An engine cooling system according to claim 1, wherein said oil temperature detector means comprises an oil temperature sensor for detecting the temperature of lubricating oil to be supplied to an overhead camshaft.
Claim 4
Dependent Claim
38 words
An engine cooling system according to claim 2, wherein lubricating oil supply means are provided for the overhead camshaft and have an oil ejector hole for continuously ejecting oil on said temperature sensor while the engine is running.
Claim 5
Dependent Claim
25 words
An engine cooling system according to claim 1, wherein said controller means includes means for issuing the control signal for a preset period of time.
Claim 6
Dependent Claim
27 words
An engine cooling system according to claim 1, wherein said controller means includes a timer device for applying said control signal for a preset period of time.
Claim 7
Dependent Claim
90 words
In an internal combustion engine cooling system having a liquid coolant circulating system with a radiator and an electrically driven engine cooling fan, an improvement comprising, first means for detecting an engine stopping condition of the engine, second means for detecting the temperature of lubricating oil in the engine, and controller means for causing operation of the fan when the stopping condition is detected by said first means and said second means detects an oil temperature above a predetermined reference temperature which may result in fuel percolation and vapor lock.
Claim 8
Dependent Claim
90 words
In an internal combustion engine cooling system having a liquid coolant circulating system with a radiator and an electrically driven engine cooling fan, an improvement comprising, first means for detecting an engine stopping condition of the engine, second means for detecting the temperature of lubricating oil in the engine, and controller means for causing operation of the fan when the stopping condition is detected by said first means and said second means detects an oil temperature above a predetermined reference temperature which may result in fuel percolation and vapor lock.
Claim 9
Dependent Claim
28 words
The cooling system of claim 6, wherein said controller means includes timer means for causing said operation of the fan to terminate after a preset period of time.
Claim 10
Dependent Claim
38 words
The cooling system of claim 6, wherein said controller means includes means for causing said operation of the fan to terminate when the temperature of the oil as detected by said second means drops below a preselected temperature.
Claim 11
Dependent Claim
28 words
The cooling system of claim 8, wherein said controller means includes timer means for causing said operation of the fan to terminate after a preset period of time.
Claim 12
Dependent Claim
36 words
The cooling system of claim 1 wherein a main engine cooling fan and a smaller engine cooling subfan are provided, said fan driver means being for operating said subfan only in response to said control signal.
Claim 13
Dependent Claim
39 words
The cooling system of claim 10 wherein said subfan driver means has two speeds of operation, and means for causing operation of said subfan driver means at the lower of said two speeds in response to said control signal.
Claim 14
Dependent Claim
30 words
The cooling system of claim 6 wherein a second cooling fan is provided and larger than the first-said cooling fan for providing the main air circulation through the coolant radiator.
Claim 15
Dependent Claim
32 words
The cooling system of claim 12 wherein the firstsaid cooling fan is operable at two speeds and is operated at the lower of said two speeds in response to said controller means.
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) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |