Patent EP0732089A2 successfully refreshed from Google Patents.
US3704591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for purifying exhaust gas of an internal combustion
Assignee: Mazda Motor Corp
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Filing: 1971-01-14
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Granted: 1972-12-05
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Expires: 1991-01-14
Abstract
Abstract A system for purifying an exhaust gas of an internal combustion engine where secondary air is supplied to the exhaust gas system for reburning the exhaust gas includes a first switch switching at a predetermined engine temperature, a second switch switching upon detecting engine speed, for switching ON and OFF, the operation of said secondary air supplying means at both high and low speed set values in response to the switching of said first switch.
Inventors
- 👤 Yasuo Tatsutomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:20
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/22; F01N3/222
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
156 words
A system for purifying an exhaust gas of an internal combustion engine comprising: a. means for supplying the secondary air to the engine exhaust system for reburning the engine exhaust gas, b. control means for controlling the operation of said secondary air supplying means in response to the engine speed and the engine temperature, c. temperature detecting means for detecting the engine temperature at a predetermined value, d. speed detecting means for detecting the engine speed at a predetermined high value and a predetermined low value, and e. means operatively coupling said temperature and speed detecting means to said control means to cause said secondary air supplying means to supply secondary air to the engine exhaust gas system when the engine operates below said predetermined temperature and at the same time operates below said predetermined high speed, and when said engine operates above said predetermined temperature and at the same time below said predetermined low speed.
Claim 2
Independent Claim
156 words
A system for purifying an exhaust gas of an internal combustion engine comprising: a. means for supplying the secondary air to the engine exhaust system for reburning the engine exhaust gas, b. control means for controlling the operation of said secondary air supplying means in response to the engine speed and the engine temperature, c. temperature detecting means for detecting the engine temperature at a predetermined value, d. speed detecting means for detecting the engine speed at a predetermined high value and a predetermined low value, and e. means operatively coupling said temperature and speed detecting means to said control means to cause said secondary air supplying means to supply secondary air to the engine exhaust gas system when the engine operates below said predetermined temperature and at the same time operates below said predetermined high speed, and when said engine operates above said predetermined temperature and at the same time below said predetermined low speed.
Claim 3
Dependent Claim
66 words
A system as claimed in claim 1, for an internal combustion engine having a spark plug for each combustion chamber, and said system includes means responsive to the engine speed below said predetermined high speed and responsive to the engine temperature below said predetermined temperature to supply the secondary air to said engine exhaust gas system and to simultaneously vary the actuation of said spark plug.
Claim 4
Dependent Claim
69 words
A system as claimed in claim 1, for an internal combustion engine having two spark plugs for each combustion chamber, and said system includes means responsive to the engine speed below said predetermined high speed and responsive to the engine temperature below said predetermined temperature to supply the secondary air to said engine exhaust gas system and to simultaneously vary the actuation of one of said two spark plugs.
Claim 5
Independent Claim
151 words
A system for purifying the exhaust gas of an internal combustion engine comprising: a. means for supplying secondary air to the engine exhaust gas for reburning the same, b. control means for controlling the operation of said secondary air supplying means in response to engine speed and engine temperature, c. said control means including first switching means switching in response to the engine temperature at a predetermined value, second switching means switching in response to the engine speed at a predetermined high speed, and third switching means switching in response to the engine speed at a predetermined low speed, d. whereby, said secondary air supplying means supplies secondary air to the engine exhaust gas system when the engine operates below said predetermined temperature and at the same time below said predetermined high speed and when the engine operates above said predetermined temperature at the same time below said predetermined low speed.
Claim 6
Independent Claim
151 words
A system for purifying the exhaust gas of an internal combustion engine comprising: a. means for supplying secondary air to the engine exhaust gas for reburning the same, b. control means for controlling the operation of said secondary air supplying means in response to engine speed and engine temperature, c. said control means including first switching means switching in response to the engine temperature at a predetermined value, second switching means switching in response to the engine speed at a predetermined high speed, and third switching means switching in response to the engine speed at a predetermined low speed, d. whereby, said secondary air supplying means supplies secondary air to the engine exhaust gas system when the engine operates below said predetermined temperature and at the same time below said predetermined high speed and when the engine operates above said predetermined temperature at the same time below said predetermined low speed.
Claim 7
Dependent Claim
68 words
A system as claimed in claim 4 wherein said first switching means includes a fixed low temperature contact operatively coupled to said second switching means, a fixed high temperature contact operatively coupled to said third switching means and a movable contact responsive to engine temperature and in contact with said fixed low temperature contact below said predetermined temperature and said fixed high temperature contact above said predetermined temperature.
Claim 8
Independent Claim
232 words
A system for purifying an exhaust gas of an internal combustion engine including at least one spark plug for each combustion chamber and an engine inlet manifold, said system comprising: a. means for controlling the supply of secondary air to the engine exhaust gas system for reburning the engine exhaust gas, b. first switching means switching in response to the engine temperature at a predetermined value, c. second switching means switching in response to the engine speed at a predetermined high speed, d. third switching means switching in response to the engine speed at a predetermined low speed, e. said first switching means operatively coupled to said second switching means when the engine temperature is below said predetermined value to said third switching means when the engine temperature is above said predetermined value, f. circuit means for controlling the operation of said secondary air supply control means through said first and second switching means, whereby, when the engine operates below said predetermined temperature and at the same time below said predetermined high speed, secondary air is supplied to the engine exhaust gas, and g. circuit means for controlling the operation of said secondary air supply control means through said first and third switching means, whereby, when the engine operates above said predetermined temperature and at the same time below said predetermined low speed, secondary air is supplied to the engine exhaust gas.
Claim 9
Independent Claim
232 words
A system for purifying an exhaust gas of an internal combustion engine including at least one spark plug for each combustion chamber and an engine inlet manifold, said system comprising: a. means for controlling the supply of secondary air to the engine exhaust gas system for reburning the engine exhaust gas, b. first switching means switching in response to the engine temperature at a predetermined value, c. second switching means switching in response to the engine speed at a predetermined high speed, d. third switching means switching in response to the engine speed at a predetermined low speed, e. said first switching means operatively coupled to said second switching means when the engine temperature is below said predetermined value to said third switching means when the engine temperature is above said predetermined value, f. circuit means for controlling the operation of said secondary air supply control means through said first and second switching means, whereby, when the engine operates below said predetermined temperature and at the same time below said predetermined high speed, secondary air is supplied to the engine exhaust gas, and g. circuit means for controlling the operation of said secondary air supply control means through said first and third switching means, whereby, when the engine operates above said predetermined temperature and at the same time below said predetermined low speed, secondary air is supplied to the engine exhaust gas.
Claim 10
Dependent Claim
61 words
A system as claimed in claim 6, wherein: said first switching means includes a fixed low temperature contact operatively coupled to said second switching means, a fixed high temperature contact operatively coupled to said third switching means, and a movable contact contacting said fixed low temperature contact below said predetermined temperature and said fixed high temperature contact above said predetermined temperature.
Claim 11
Dependent Claim
156 words
A system as claimed in claim 6, for an internal combustion engine having first and second spark plugs for each combustion chamber and wherein: said system further includes means responsive to engine temperature below said predetermined temperature and responsive to engine speed below said predetermined high speed to supply the secondary air to said exhaust gas system and to simultaneously vary the actuation of said first spark plug, and responsive to engine temperature below said predetermined temperature and responsive to engine speed above said predetermined high speed to cut off the secondary air to said exhaust gas system and to simultaneously maintain the normal actuation of said first spark plug, means responsive to engine temperature above said predetermined temperature for maintaining normal actuation of said first spark plug through said first switching means regardless of the engine speed and means for maintaining normal actuation of said second spark plug regardless of the engine speed and temperature.
Claim 12
Dependent Claim
52 words
A system as claimed in claim 8, further comprising a vacuum switch responsive to vacuum of the engine inlet manifold when the engine is idling, decelerating and operating under full load for maintaining normal actuation of said first spark plug regardless of the operation of said first, second and third switching means.
Claim 13
Independent Claim
153 words
A system for purifying an exhaust gas of an internal combustion engine comprising: a. meAns for controlling the secondary air supply to the engine exhaust gas system for reburning the engine exhaust gas, b. a source of electrical power, c. control means for electrically connecting said source and said secondary air supply controlling means, d. said control means including first switching means switching in response to the engine temperature at a predetermined value, second switching means switching in response to the engine speed at a predetermined high speed, and third switching means switching in response to the engine speed at a predetermined low speed, whereby, when the engine operates below said predetermined temperature and at the same time below said predetermined high speed, and when the engine operates above said predetermined temperature at the same time below said predetermined low speed, said control means supplies secondary air to the engine exhaust gas system.
Claim 14
Independent Claim
153 words
A system for purifying an exhaust gas of an internal combustion engine comprising: a. meAns for controlling the secondary air supply to the engine exhaust gas system for reburning the engine exhaust gas, b. a source of electrical power, c. control means for electrically connecting said source and said secondary air supply controlling means, d. said control means including first switching means switching in response to the engine temperature at a predetermined value, second switching means switching in response to the engine speed at a predetermined high speed, and third switching means switching in response to the engine speed at a predetermined low speed, whereby, when the engine operates below said predetermined temperature and at the same time below said predetermined high speed, and when the engine operates above said predetermined temperature at the same time below said predetermined low speed, said control means supplies secondary air to the engine exhaust gas system.
Claim 15
Independent Claim
251 words
A system for purifying the exhaust gas of an internal combustion engine having at least one spark plug for each combustion chamber and an inlet manifold, comprising: a. means for controlling the secondary air supply to the engine exhaust gas system for reburning the engine exhaust gas, b. a source of electrical power, c. first switching means switching in response to the engine temperature at a predetermined value, and coupling said source of electrical power to said secondary air supply controlling means, d. second switching means switching in response to the engine speed at a predetermined high speed, and electrically connecting said secondary air supply controlling means to said source when engine speed is below said predetermined high speed, e. third switching means switching in response to the engine speed at a predetermined low speed, and electrically connecting said secondary air supply control means to said source when the engine speed is below said predetermined low speed, f. means operatively connecting said first switching means to said second switching means when the the engine temperature is below said predetermined temperature, and to said third switching means when the engine temperature is above said predetermined temperature, g. whereby, said secondary air supply control means acts to supply secondary air to the engine exhaust gas system when the engine operates below said predetermined temperature and at the same time below said predetermined high speed, and when the engine operates above said predetermined temperature and at the same time below said predetermined low speed.
Claim 16
Independent Claim
251 words
A system for purifying the exhaust gas of an internal combustion engine having at least one spark plug for each combustion chamber and an inlet manifold, comprising: a. means for controlling the secondary air supply to the engine exhaust gas system for reburning the engine exhaust gas, b. a source of electrical power, c. first switching means switching in response to the engine temperature at a predetermined value, and coupling said source of electrical power to said secondary air supply controlling means, d. second switching means switching in response to the engine speed at a predetermined high speed, and electrically connecting said secondary air supply controlling means to said source when engine speed is below said predetermined high speed, e. third switching means switching in response to the engine speed at a predetermined low speed, and electrically connecting said secondary air supply control means to said source when the engine speed is below said predetermined low speed, f. means operatively connecting said first switching means to said second switching means when the the engine temperature is below said predetermined temperature, and to said third switching means when the engine temperature is above said predetermined temperature, g. whereby, said secondary air supply control means acts to supply secondary air to the engine exhaust gas system when the engine operates below said predetermined temperature and at the same time below said predetermined high speed, and when the engine operates above said predetermined temperature and at the same time below said predetermined low speed.
Claim 17
Dependent Claim
160 words
A system as claimed in claim 11, for an internal combustion engine having first and second spark plugs for each combustion chamber, said system further comprising: first ignition means for igniting said first spark plug and second ignition means for igniting said second spark plug, means operatively coupling said first ignition means to said second switching means for varying the actuation of said first spark plug below said predetermined temperature and at the same time below said predetermined high speed and for maintaining the normal actuation of said first spark plug below said predetermined temperature and at the same time above said predetermined high speed and to said first switching means for maintaining the normal actuation of said first spark plug above said predetermined temperature regardless of the engine speed, and means coupling said second ignition means to said source of electrical power for maintaining the normal actuation of said second spark plug regardless of said engine speed and temperature.
Claim 18
Dependent Claim
53 words
A system as claimed in claim 12, further comprising: a vacuum switch responsive to vacuum of the engine inlet manifold when the engine is idling, decelerating and operating under full load for maintaining the normal actuation of said first spark plug regardless of the operation of said first, second and third switching means.
Claim 19
Independent Claim
256 words
A system for purifying an exhaust gas of an internal combustion engine having at least one spark plUg for each combustion chamber, comprising: a. means for controlling the secondary air supply to the engine exhaust gas system for reburning the engine exhaust gas, b. a source of electrical power, c. first switching means switching in response to the engine temperature at a predetermined value, d. said first switching means including a movable contact coupled to said source of electrical power, a fixed high temperature contact operatively coupled to said movable contact above said predetermined temperature and a fixed low temperature contact operatively coupled to said movable contact below said predetermined temperature, e. second switching means operatively coupled to said low temperature contact and switching at a predetermined high engine speed, f. means operatively connecting said second switching means to said secondary air supply control means when the engine speed is below said predetermined high speed, g. third switching means operatively coupled to said high temperature contact and switching in response to a predetermined low engine speed, h. means operatively connecting said third switching means to said secondary air supply control means when the engine speed is below said predetermined low speed; whereby, said secondary air supply control means acts to supply the secondary air to the engine exhaust gas when the engine operates below said predetermined temperature and at the same time below said predetermined high speed, and when the engine operates above said predetermined temperature and at the same time below said predetermined low speed.
Claim 20
Independent Claim
256 words
A system for purifying an exhaust gas of an internal combustion engine having at least one spark plUg for each combustion chamber, comprising: a. means for controlling the secondary air supply to the engine exhaust gas system for reburning the engine exhaust gas, b. a source of electrical power, c. first switching means switching in response to the engine temperature at a predetermined value, d. said first switching means including a movable contact coupled to said source of electrical power, a fixed high temperature contact operatively coupled to said movable contact above said predetermined temperature and a fixed low temperature contact operatively coupled to said movable contact below said predetermined temperature, e. second switching means operatively coupled to said low temperature contact and switching at a predetermined high engine speed, f. means operatively connecting said second switching means to said secondary air supply control means when the engine speed is below said predetermined high speed, g. third switching means operatively coupled to said high temperature contact and switching in response to a predetermined low engine speed, h. means operatively connecting said third switching means to said secondary air supply control means when the engine speed is below said predetermined low speed; whereby, said secondary air supply control means acts to supply the secondary air to the engine exhaust gas when the engine operates below said predetermined temperature and at the same time below said predetermined high speed, and when the engine operates above said predetermined temperature and at the same time below said predetermined low speed.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |