US3849984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Member for controlling exhaust gas purifying device
Assignee: Toyota Motor Corp
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Filing: 1973-03-28
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Granted: 1974-11-26
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Expires: 1993-03-28
Abstract
Abstract To regulate the supply of secondary air to the exhaust system of an internal combustion engine, a valve is positioned in the line supplying the secondary air so that the air can be selectively directed to the exhaust system or into the atmosphere. Detector members are arranged to monitor various operating characteristics of the internal combustion engine and to signal a control member which, in turn, regulates a control valve which controls, in part, the passage of engine manifold negative pressure to the valve. The valve contains a number of compartments and the pressure relationship between the compartments, certain of which are selectively exposed to the manifold negative pressure, determines the operation of the valve in selectively directing the flow of the secondary air.
Inventors
- 👤 T Toda
- 👤 T Nagano
- 👤 T Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:33
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/22; F01N3/222; F01N3/227; F01N3/24; F01N3/30; F01N3/32; F01N9/00; F02; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
232 words
An exhaust gas purifying device for use in supplying secondary air into the exhaust system of an internal combustion engine, comprising a first valve located in the path of the secondary air into the exhaust system and displaceable between a first position for supplying secondary air into the exhaust system and a second position for discharging the secondary air into the atmosphere, a second valve for regulating the supply of manifold negative pressure from the internal combustion engine into said first valve, first means for operating said second valve, second means for detecting various operating conditions of the internal combustion engine, said second means connected to said first means for operating said second valve for transmitting an input signal to said first means so that said second valve regulates the supply of manifold negative pressure to said first valve whereby said first valve is disposed in the first or second position based on the operating conditions of the engine checked by said second means, and said second means comprise an engine cooling water temperature detector, a fast idle cam position detector and a vehicle speed detector each connected to said first means and each of said engine cooling water temperature detector, fast idle cam positioN detector and vehicle speed detector being arranged so that predetermined conditions for each of said detectors must be detected before said first means operates said second valve.
Claim 2
Dependent Claim
232 words
An exhaust gas purifying device for use in supplying secondary air into the exhaust system of an internal combustion engine, comprising a first valve located in the path of the secondary air into the exhaust system and displaceable between a first position for supplying secondary air into the exhaust system and a second position for discharging the secondary air into the atmosphere, a second valve for regulating the supply of manifold negative pressure from the internal combustion engine into said first valve, first means for operating said second valve, second means for detecting various operating conditions of the internal combustion engine, said second means connected to said first means for operating said second valve for transmitting an input signal to said first means so that said second valve regulates the supply of manifold negative pressure to said first valve whereby said first valve is disposed in the first or second position based on the operating conditions of the engine checked by said second means, and said second means comprise an engine cooling water temperature detector, a fast idle cam position detector and a vehicle speed detector each connected to said first means and each of said engine cooling water temperature detector, fast idle cam positioN detector and vehicle speed detector being arranged so that predetermined conditions for each of said detectors must be detected before said first means operates said second valve.
Claim 3
Dependent Claim
118 words
An exhaust gas purifying device, as set forth in claim 1, wherein said first valve comprises a housing having at least one chamber therein, said chamber having an inlet for supplying secondary air to said chamber, a first outlet for directing the secondary air from said chamber to the exhaust system and a second outlet for discharging the secondary air from said chamber into the atmosphere, a valve member positioned within said chamber for directing flow from said inlet to one of said first and second outlets, and third means positioned within said housing for displacing said valve member for selectively directing the flow of secondary air from said inlet to one of said first and second outlets.
Claim 4
Dependent Claim
226 words
An exhaust gas purifying device, as set forth in claim 1, wherein said first valve comprises a housing with said housing arranged for dividing the interior of said first valve into a first chamber, a second chamber and a third chamber, a first displaceably mounted wall member located within said first chamber and dividing it into a first compartment and a second compartment, a second displaceably mounted wall member located within said second chamber and dividing it into a third compartment and a fourth compartment, said housing forming an opening between said second compartment and said third compartment, a first valve member located in the opening between said second compartment and third compartment and displaceable between a first position for closing the opening and a second position for admitting flow from said second compartment into said third compartment, said housing forming an inlet for admitting secondary air into said third chamber and a first outlet and a second outlet for discharging the secondary air from said third chamber, and a second valve member located within said third chamber and displaceable therein between a first position for directing the flow from said inlet to said first outlet and blocking off flow to said second outlet and a second position for directing flow from said inlet to said second outlet and blocking off flow to said first outlet.
Claim 5
Dependent Claim
108 words
An exhaust gas purifying device, as set forth in claim 3, wherein said housing forms an inlet for admitting manifold negative pressure from the internal combustion engine into said first compartment and an inlet for admitting atmospheric air into said second compartment, a spring member positioned within said first compartment and in contact with said first wall means for biasing said first wall member toward said second compartment, and said first valve member is connected to said first wall member for positioning said first valve member in accordance with the pressure relationship between said first and second compartments which pressure relationship movably displaces said displaceably mounted wall member.
Claim 6
Dependent Claim
41 words
An exhaust gas purifying device, as set forth in claim 4, wherein a second spring member is disposed in contact with said first valve member for biasing it into position for closing the opening formed between said second and third compartments.
Claim 7
Dependent Claim
89 words
An exhaust gas purifying device, as set forth in claim 3, wherein said second valve member is connected to said second wall, said housing forms an inlet communicating with said fourth compartment for admitting manifold negative pressure from the internal combustion engine, the flow of manifold negative pressure into said inlet to said fourth compartment is regulated by said second valve, said second wall has a metering orifice therethrough between said third and fourth compartments, and a spring biasing said second wall in the direction of said third compartment.
Claim 8
Dependent Claim
77 words
An exhaust gas purifying device, as set forth in claim 4, including a conduit arranged to transmit negative pressure from the internal combustion engine to said inlet to said fourth compartmenT, a branch conduit communicating between said conduit and said second valve, another conduit connecting said second valve and said inlet to said first compartment for admitting manifold negative pressure to said inlet when said second valve is opened by said means for operating said second valve.
Claim 9
Dependent Claim
146 words
An exhaust gas purifying device, as set forth in claim 1, including a carburetor arranged to be mounted on the engine, a throttle valve and a choke valve positioned within said carburetor, said fast idle cam position detector comprising a fast idle cam, means for pivotally mounting said cam on said carburetor and for insulating said cam from said carburetor, a lever connected to said throttle valve and displaceable therewith, said lever is engageable with said cam under certain operating conditions of said internal combustion engine, a link, a bimetal member connecting said choke valve to said link, a second lever connected to said choke valve, a link connected at one end to said second lever and an insulating member positioned on the other end of said link for attaching it to said cam, and a lead wire connected to said cam and extending outwardly therefrom.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |