US3738108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for an engine equipped with an exhaust gas purifier
Assignee: Toyota Motor Corp
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Filing: 1971-02-09
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Granted: 1973-06-12
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Expires: 1991-02-09
Abstract
Abstract In an internal combustion engine equipped with an exhaust gas purifier adapted to be controlled based on the values of cooling water temperature, exhaust gas temperature and vehicle speeds detected by detectors, a safety device for the engine equipped with an exhaust gas purifier. Said safety device is characterized in that means is provided at least in a part in which temperature is elevated abnormally by abnormal operation condition of said internal combustion engine for rendering inoperative control means for said exhaust gas purifier when the elevated temperature reaches a predetermined level.
Inventors
- 👤 K Mizuno
- 👤 K Goto
- 👤 N Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:06
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/22; F01N3/222; F01N11/00; F01N11/002; F01P; F01P11/00; F01P11/14; F01P11/16; F02; F02B; F02B77/00; F02B77/08; F02B77/085; F02B77/086; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1446; F01N2550/00; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
181 words
For an internal combustion engine having a drive shaft, cooling means for the engine, and a gas exhaust; a gas purifying system, comprising first detecting means coupled to said drive shaft for sensing the speed of the drive shaft and producing a signal indicative of the speed of the drive shaft, second detecting means coupled to said exhaust for responding to the temperature of the exhaust and for producing a signal indicative of the temperature of the exhaust, regulating means responsive to said first and second detecting means for producing control signals on the basis of the signals from said detecting means, control means responsive to the control signals of said regulating means and coupled to the engine for varying the operation of the purifying system so as to affect the nature of the exhaust gas, and saFety means coupled to the engine for responding to the temperature of at least a portion of the engine and interrupting the signals between said regulating means and said control means when the temperature of the portion of the engine reaches a predetermined value.
Claim 2
Dependent Claim
181 words
For an internal combustion engine having a drive shaft, cooling means for the engine, and a gas exhaust; a gas purifying system, comprising first detecting means coupled to said drive shaft for sensing the speed of the drive shaft and producing a signal indicative of the speed of the drive shaft, second detecting means coupled to said exhaust for responding to the temperature of the exhaust and for producing a signal indicative of the temperature of the exhaust, regulating means responsive to said first and second detecting means for producing control signals on the basis of the signals from said detecting means, control means responsive to the control signals of said regulating means and coupled to the engine for varying the operation of the purifying system so as to affect the nature of the exhaust gas, and saFety means coupled to the engine for responding to the temperature of at least a portion of the engine and interrupting the signals between said regulating means and said control means when the temperature of the portion of the engine reaches a predetermined value.
Claim 3
Dependent Claim
43 words
A system as in claim 1 further comprising third detecting means responsive to a cooling medium in said cooling means, said regulating means being responsive to said third detecting means and producing its control signals on the basis of all three detecting means.
Claim 4
Dependent Claim
38 words
A system as in claim 1, wherein said safety means includes temperature responsive circuit breaker means located to respond to the temperature of a portion of the engine and connected between said regulating means and said control means.
Claim 5
Dependent Claim
13 words
A system as in claim 3, wherein said breaker means includes a fuse.
Claim 6
Dependent Claim
13 words
A system as in claim 3, wherein said breaker means includes thermostatic means.
Claim 7
Dependent Claim
40 words
A system as in claim 3, wherein said breaker means includes thermostatic means and a relay responsive to the condition of said thermostatic means for opening and closing the flow of signals between said regulating means and said control means.
Claim 8
Dependent Claim
37 words
A system as in claim 2, wherein said safety means includes temperature responsive breaker means located to respond to the temperature of a portion of the engine and connected between said regulating means and said control means.
Claim 9
Dependent Claim
30 words
A system as in claim 1, wherein said safety means includes indicating means for indicating whether said control means is interrupting signals between said regulating means and said control means.
Claim 10
Dependent Claim
22 words
A system as in claim 3, wherein said safety means further includes indicating means responsive to the condition of said breaker means.
Claim 11
Dependent Claim
25 words
A system as in claim 6, further comprising indicating means responsive to the condition of said relay for indicating the condition of said breaker means.
Claim 12
Dependent Claim
28 words
A system as in claim 1, wherein said control means includes after-burner means mounted on the engine and a valve for controlling the operation of said after-burner means.
Claim 13
Dependent Claim
28 words
A system as in claim 11, wherein said safety means includes indicating means for indicating whether the signals between said regulating means and said control means are interrupted.
Claim 14
Dependent Claim
38 words
A system as in claim 11, wherein said safety means includes temperature responsive circuit breaker means located to respond to the temperature of a portion of the engine and connected between said regulating means and said control means.
Claim 15
Dependent Claim
30 words
A system as in claim 11, wherein said safety means includes indicating means for indicating whether said control means is interrupting signals between said regulating means and said control means.
Claim 16
Dependent Claim
136 words
An engine comprising an engine block, a drive shaft, engine cooling means, exhaust means, first detecting means coupled to said drive shaft for producing a signal indicative of the speed of said drive shaft, second detecting means coupled to said exhaust means for producing a signal corresponding to the temperature of gases in said exhaust means, regulating means coupled to said first and second detecting means for producing control signals on the basis of the signals from said detecting means, control means responsive to the output of said regulating means for varying the exhaust means gases in said exhaust, and safety means responsive to the temperature of at least a portion of the engine and coupled between said regulating means and said control means for interrupting the coupling between said regulating means and said control means.
Claim 17
Dependent Claim
136 words
An engine comprising an engine block, a drive shaft, engine cooling means, exhaust means, first detecting means coupled to said drive shaft for producing a signal indicative of the speed of said drive shaft, second detecting means coupled to said exhaust means for producing a signal corresponding to the temperature of gases in said exhaust means, regulating means coupled to said first and second detecting means for producing control signals on the basis of the signals from said detecting means, control means responsive to the output of said regulating means for varying the exhaust means gases in said exhaust, and safety means responsive to the temperature of at least a portion of the engine and coupled between said regulating means and said control means for interrupting the coupling between said regulating means and said control means.
Claim 18
Dependent Claim
30 words
An engine as in claim 15, wherein said safety means further includes indicating means for indicating whether the coupling between said regulating means and said control means has been interrupted.
Claim 19
Dependent Claim
20 words
An engine as in claim 15, wherein said control means includes a valve and an after-burner controlled by said valve.
Claim 20
Dependent Claim
52 words
A system as in claim 3, wherein said breaker means includes a first heat responsive member mounted on the exHaust and a second heat responsive member mounted on the cooling means, said heat responsive members being connected so that opening of either discontinues signals between said regulating means and said control means.
Claim 21
Dependent Claim
20 words
A system as in claim 18, wherein said temperature responsive means are each fuses connected in series with each other.
Claim 22
Dependent Claim
32 words
A system as in claim 18, wherein said temperature responsive means are each thermostatic devices connected in series with each other for opening in response to a temperature beyond a predetermined value.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |