US4235207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1979-02-05
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Granted: 1980-11-25
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Expires: 1999-02-05
Abstract
Abstract Apparatus for controlling introduction of gas into a passage of an internal combustion engine employs a first control valve in a gas introduction passageway, a second control valve in an air conduit connecting the intake passage to atmosphere, and a regulating valve responsive to vacuum intensity in the intake passage. The regulating valve actuates vacuum responsive actuators for the control valves. This system is used for recirculating exhaust gases into the intake passage, for introducing supplementary atmospheric air into the intake passage to modifying the air-fuel ratio in accordance with atmospheric pressure reduction at high altitudes, and for controlling the introduction of atmospheric air into the exhaust passage upstream from a catalytic converter or reactor.
Inventors
- 👤 Hiroyuki Nishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:09
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/22; F02; F02M; F02M26/00; F02M26/52; F02M26/55; F02M26/56
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
124 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the intake passage having a venturi portion, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing additional gas into one of said passages, a first control valve in said passageway, an air conduit connecting said intake passage to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said venturi portion and vacuum pressure in said air conduit.
Claim 2
Dependent Claim
124 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the intake passage having a venturi portion, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing additional gas into one of said passages, a first control valve in said passageway, an air conduit connecting said intake passage to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said venturi portion and vacuum pressure in said air conduit.
Claim 3
Dependent Claim
32 words
The combination set forth in claim 1 in which means are provided for obtaining additional gas from said exhaust passage and delivering it through said first control valve to said intake passage.
Claim 4
Dependent Claim
33 words
The combination set forth in claim 1 in which means are provided for obtaining additional gas which constitutes atmospheric air and delivering it through said first control valve to one of said passages.
Claim 5
Dependent Claim
32 words
The combination set forth in claim 1 in which means are provided for obtaining additional gas which constitutes atmospheric air and delivering it through said first control valve to said intake passage.
Claim 6
Dependent Claim
32 words
The combination set forth in claim 1 in which means are provided for obtaining additional gas which constitutes atmospheric air and delivering it through said first control valve to said exhaust passage.
Claim 7
Dependent Claim
140 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the intake passage having a throttle valve and having a venturi portion, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway connecting said exhaust passage to said intake passage downstream from said throttle valve for recirculating exhaust gases into said engine, a first control valve in said passageway, an air conduit connecting said intake passage to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said venturi portion and vacuum pressure in said air conduit.
Claim 8
Dependent Claim
140 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the intake passage having a throttle valve and having a venturi portion, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway connecting said exhaust passage to said intake passage downstream from said throttle valve for recirculating exhaust gases into said engine, a first control valve in said passageway, an air conduit connecting said intake passage to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said venturi portion and vacuum pressure in said air conduit.
Claim 9
Dependent Claim
128 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the intake passage having a throttle valve and a venturi portion, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing atmospheric air into one of said passages, a first control valve in said passageway, an air conduit connecting said intake passage to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said venturi portion and vacuum pressure in said air conduit.
Claim 10
Dependent Claim
128 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the intake passage having a throttle valve and a venturi portion, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing atmospheric air into one of said passages, a first control valve in said passageway, an air conduit connecting said intake passage to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said venturi portion and vacuum pressure in said air conduit.
Claim 11
Dependent Claim
137 words
In an internal combustion engine, the combination of an intake passage for delivering an air-fuel mixture into the engine, a throttle valve in said intake passage, an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing atmospheric air into said intake passage downstream from said throttle valve, a first control valve in said passageway, an air conduit connecting said intake passage downstream from said throttle valve to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said air conduit and vacuum pressure in said intake passage upstream from said throttle valve.
Claim 12
Dependent Claim
137 words
In an internal combustion engine, the combination of an intake passage for delivering an air-fuel mixture into the engine, a throttle valve in said intake passage, an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing atmospheric air into said intake passage downstream from said throttle valve, a first control valve in said passageway, an air conduit connecting said intake passage downstream from said throttle valve to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said air conduit and vacuum pressure in said intake passage upstream from said throttle valve.
Claim 13
Dependent Claim
132 words
In an internal combustion engine, the combination of an intake passage for delivering an air-fuel mixture into the engine, a throttle valve in said intake passage, an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing atmospheric air into said exhaust passage, a first control valve in said passageway, an air conduit connecting said intake passage downstream from said throttle valve to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said air conduit and vacuum pressure in said intake passage upstream from said throttle valve.
Claim 14
Dependent Claim
132 words
In an internal combustion engine, the combination of an intake passage for delivering an air-fuel mixture into the engine, a throttle valve in said intake passage, an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing atmospheric air into said exhaust passage, a first control valve in said passageway, an air conduit connecting said intake passage downstream from said throttle valve to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said air conduit and vacuum pressure in said intake passage upstream from said throttle valve.
Claim 15
Dependent Claim
106 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing additional gas into one of said passages, a first control valve in said passageway, an air conduit connecting said intake passage to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to vacuum pressure in said air conduit.
Claim 16
Dependent Claim
106 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing additional gas into one of said passages, a first control valve in said passageway, an air conduit connecting said intake passage to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to vacuum pressure in said air conduit.
Claim 17
Dependent Claim
139 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the intake passage having a venturi portion and having a throttle valve, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing additional gas into one of said passages, a first control valve in said passageway, an air conduit connecting said intake passage downstream from said throttle valve to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve having a vacuum responsive actuator for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said venturi portion and vacuum pressure in said air conduit.
Claim 18
Dependent Claim
139 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the intake passage having a venturi portion and having a throttle valve, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway for introducing additional gas into one of said passages, a first control valve in said passageway, an air conduit connecting said intake passage downstream from said throttle valve to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve having a vacuum responsive actuator for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to differential vacuum pressure between vacuum pressure in said venturi portion and vacuum pressure in said air conduit.
Claim 19
Dependent Claim
129 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the intake passage having a throttle valve, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway connecting said exhaust passage to said intake passage downstream from said throttle valve for recirculating exhaust gases into said engine, a first control valve in said passageway, an air conduit connecting said intake passage downstream from said throttle valve to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to vacuum pressure in said air conduit.
Claim 20
Dependent Claim
129 words
In an internal combustion engine having an intake passage for delivering an air-fuel mixture into the engine, the intake passage having a throttle valve, the combination of: an exhaust passage for carrying exhaust gases from the engine, means including a passageway connecting said exhaust passage to said intake passage downstream from said throttle valve for recirculating exhaust gases into said engine, a first control valve in said passageway, an air conduit connecting said intake passage downstream from said throttle valve to atmosphere, a second control valve in said air conduit, each of said control valves having a vacuum responsive actuator, and a regulating valve for controlling vacuum intensity in the actuator for each of said control valves, said regulating valve being responsive to vacuum pressure in said air conduit.
Claim 21
Dependent Claim
44 words
The combination set forth in claim 1 in which orifice means are provided in said air conduit between said second control valve and atmosphere, said regulating valve communicating with said air conduit at a location between said orifice means and said second control valve.
Claim 22
Dependent Claim
44 words
The combination set forth in claim 10 in which orifice means are provided in said air conduit between said second control valve and atmosphere, said regulating valve communicating with said air conduit at a location between said orifice means and said second control valve.
Claim 23
Dependent Claim
44 words
The combination set forth in claim 11 in which orifice means are provided in said air conduit between said second control valve and atmosphere, said regulating valve communicating with said air conduit at a location between said orifice means and said second control valve.
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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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |