US4434778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air induction control device for internal combustion engine
Assignee: Nissan Motor Co Ltd
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Filing: 1983-01-13
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Granted: 1984-03-06
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Expires: 2003-01-13
Abstract
Abstract An air induction control device for an internal combustion engine is composed of an air passage for communicating upstream and downstream sides of a throttle valve in an intake passageway when opened, a valve member movably disposed in the air passage to open the air passage in response to pressure differential between the upstream and downstream sides of the throttle valve in the intake passageway, and a diaphragm member mechanically connectable to the valve member so as to open the air passage in response to vacuum prevailing in the intake passageway downstream of the throttle valve, thereby effectively controlling air induction to the engine, even when the throttle valve is closed during normal engine deceleration and at sudden engine deceleration or during operation of engine accessories at idle throttle state.
Inventors
- 👤 Hideo Morita
- 👤 Yoshio Iwasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:45
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0002; F02D41/0005; F02D31/00; F02D31/001; F02D31/002; F02D31/003; F02D31/005; F02M; F02M23/00; F02M23/04; F02M23/08; F02M3/00; F02M3/06; F02M3/07; F02M3/075; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
123 words
An air induction control device for an internal combustion engine having an intake passageway in which a throttle valve is disposed, comprising: means defining an air passage for communicating upstream and downstream sides of the throttle valve in said intake passageway when opened; a valve member disposed in said air passage and movable toward the downstream side thereof to open said air passage in response to pressure differential between the upstream and downstream sides of the throttle valve in the intake passageway; and a diaphragm member mechanically connectable to and separable from said valve member and movable to move said valve member so as to open said air passage in response to vacuum prevailing in the intake passageway downstream of the throttle valve.
Claim 2
Dependent Claim
123 words
An air induction control device for an internal combustion engine having an intake passageway in which a throttle valve is disposed, comprising: means defining an air passage for communicating upstream and downstream sides of the throttle valve in said intake passageway when opened; a valve member disposed in said air passage and movable toward the downstream side thereof to open said air passage in response to pressure differential between the upstream and downstream sides of the throttle valve in the intake passageway; and a diaphragm member mechanically connectable to and separable from said valve member and movable to move said valve member so as to open said air passage in response to vacuum prevailing in the intake passageway downstream of the throttle valve.
Claim 3
Dependent Claim
226 words
An air induction control device for an internal combustion engine having an intake passageway in which a throttle valve is disposed, comprising: means defining an air passage for communicating upstream and downstream sides of the throttle valve in the intake passageway when opened, said air passage being formed with an enlarged section to define a valve seat; a plate type valve member disposed in the enlarged section of said air passage and normally seated on said valve seat to close said air passage, said valve member being movable toward the downstream side of said air passage to separate from said valve seat and thereby open said air passage in response to pressure differential between the upstream and downstream sides of the throttle valve in the intake passageway; a spring disposed in the enlarged section of said air passage to bias said valve member to be seated on said valve seat; a diaphragm member defining a vacuum chamber communicable with the intake passageway downstream of the throttle valve, said diaphragm member being movable in response to the vacuum prevailing in the intake passageway downstream of the throttle valve; and a rod member secured to said diaphragm member and contactable to and separable from said valve member so as to move said valve member to open said air passage in accordance with the movement of said diaphragm member.
Claim 4
Dependent Claim
226 words
An air induction control device for an internal combustion engine having an intake passageway in which a throttle valve is disposed, comprising: means defining an air passage for communicating upstream and downstream sides of the throttle valve in the intake passageway when opened, said air passage being formed with an enlarged section to define a valve seat; a plate type valve member disposed in the enlarged section of said air passage and normally seated on said valve seat to close said air passage, said valve member being movable toward the downstream side of said air passage to separate from said valve seat and thereby open said air passage in response to pressure differential between the upstream and downstream sides of the throttle valve in the intake passageway; a spring disposed in the enlarged section of said air passage to bias said valve member to be seated on said valve seat; a diaphragm member defining a vacuum chamber communicable with the intake passageway downstream of the throttle valve, said diaphragm member being movable in response to the vacuum prevailing in the intake passageway downstream of the throttle valve; and a rod member secured to said diaphragm member and contactable to and separable from said valve member so as to move said valve member to open said air passage in accordance with the movement of said diaphragm member.
Claim 5
Dependent Claim
34 words
An air induction control device as claimed in claim 2, in which said spring is so selected that said valve member separates from said valve seat when said pressure differential exceeds a predetermined level.
Claim 6
Dependent Claim
66 words
An air induction control system as claimed in claim 2, further comprising another spring disposed in said vacuum chamber to bias said diaphragm member in a direction to increase the volume of said vacuum chamber, said another spring being so selected as to allow said diaphragm member to move in a direction to decrease the volume of said vacuum chamber when the throttle valve is closed.
Claim 7
Dependent Claim
43 words
An air induction control device as claimed in claim 2, further comprising a stop member disposed in said enlarged section of said air passage to stop said valve member so that the movement of said valve member from said valve seat is restricted.
Claim 8
Dependent Claim
55 words
An air induction control device as claimed in claim 2, in which said diaphragm member further defines another vacuum chamber on the opposite side to said vacuum chamber with respect to said diaphragm member, said diaphragm member being formed with an orifice through which said vacuum chamber is in communication with said another vacuum chamber.
Claim 9
Dependent Claim
24 words
An air induction control deivce as claimed in claim 6, in which said vacuum chamber is smaller in volume than said another vacuum chamber.
Claim 10
Dependent Claim
26 words
An air induction control device as claimed in claim 2, further comprising means defining a vacuum passage for communicating said vacuum chamber with said valve chamber.
Claim 11
Dependent Claim
36 words
An air induction control device as claimed in claim 8, further comprising valve means for normally closing said vacuum passage and opening said vacuum passage in response to the operation of at least one engine accessory.
Claim 12
Dependent Claim
35 words
An air induction control device as claimed in claim 9, in which said valve means includes an electromagnetic valve having a plunger for opening said vacuum passage when at least one engine accessory is operated.
Claim 13
Independent Claim
353 words
A device for controlling induction air during deceleration of an internal combustion engine having an intake passageway in which a throttle valve is disposed, comprising: means defining an air passage for communicating upstream and downstream sides of the throttle valve in the intake passageway when opened, said air passage being formed with an enlarged section to define a valve seat; a plate type valve member disposed in the enlarged section of said air passage and normally seated on said valve seat to close said air passage, said valve member being movable toward the downstream side of said air passage to separate from said valve seat and thereby open said air passage in response to pressure differential between the upstream and downstream sides of the throttle valve in the intake passageway; a first spring disposed in the enlarged section of said air passage to bias said valve member to be seated on said valve seat, said first spring being so selected that said valve member separates from said valve seat when said pressure differential exceeds a predetermined level; a diaphragm member defining first and second vacuum chambers which are located opposite to each other with respect to said diaphragm member, said first vacuum chamber being in communication with the intake passageway downstream of the throttle valve, said diaphragm member being formed with an orifice through which said first vacuum chamber is in communication with said second vacuum chamber, said diaphragm member being movable in response to vacuum prevailing in the intake passageway downstream of the throttle valve; a second spring disposed in said first vacuum chamber to bias said diaphragm member in a direction to increase the volume of said first vacuum chamber, said second spring being so selected as to allow said diaphragm member to move in a direction to decrease the volume of said first vacuum chamber when the throttle valve is closed; and a rod member secured to said diaphragm member and contactable to and separable from said valve member so as to move said valve member to open said air passage in accordance with the movement of said diaphragm member.
Claim 14
Independent Claim
353 words
A device for controlling induction air during deceleration of an internal combustion engine having an intake passageway in which a throttle valve is disposed, comprising: means defining an air passage for communicating upstream and downstream sides of the throttle valve in the intake passageway when opened, said air passage being formed with an enlarged section to define a valve seat; a plate type valve member disposed in the enlarged section of said air passage and normally seated on said valve seat to close said air passage, said valve member being movable toward the downstream side of said air passage to separate from said valve seat and thereby open said air passage in response to pressure differential between the upstream and downstream sides of the throttle valve in the intake passageway; a first spring disposed in the enlarged section of said air passage to bias said valve member to be seated on said valve seat, said first spring being so selected that said valve member separates from said valve seat when said pressure differential exceeds a predetermined level; a diaphragm member defining first and second vacuum chambers which are located opposite to each other with respect to said diaphragm member, said first vacuum chamber being in communication with the intake passageway downstream of the throttle valve, said diaphragm member being formed with an orifice through which said first vacuum chamber is in communication with said second vacuum chamber, said diaphragm member being movable in response to vacuum prevailing in the intake passageway downstream of the throttle valve; a second spring disposed in said first vacuum chamber to bias said diaphragm member in a direction to increase the volume of said first vacuum chamber, said second spring being so selected as to allow said diaphragm member to move in a direction to decrease the volume of said first vacuum chamber when the throttle valve is closed; and a rod member secured to said diaphragm member and contactable to and separable from said valve member so as to move said valve member to open said air passage in accordance with the movement of said diaphragm member.
Claim 15
Dependent Claim
300 words
An air induction control device for an internal combustion engine having an intake passageway in which a throttle valve is disposed, comprising: means defining an air passage for communicating upstream and downstream sides of the throttle valve in the intake passageway when opened, said air passage being formed with an enlarged section to define a valve seat; a plate type valve member disposed in the enlarged section of said air passage and normally seated on said valve seat to close said air passage, said valve member being movable toward the downstream side of said air passage to separate from said valve seat and thereby open said air passage in response to pressure differential between the upstream and downstream sides of the throttle valve in the intake passageway; a spring disposed in the enlarged section of said air passage to bias said valve member to be seated on said valve seat, said spring being so selected that said valve member separates from said valve seat when said pressure differential exceeds a predetermined level; a diaphragm member defining a vacuum chamber and movable in response to vacuum prevailing in the intake passageway downstream of the throttle valve; a rod member secured to said diaphragm member and contactable to and separable from said valve member so as to move said valve member to open said air passage in accordance with the movement of said diaphragm member; means defining a vacuum passage through which said vacuum chamber and said air passage downstream of said valve member is communicable to supply the vacuum chamber with the vacuum prevailing in the intake passageway downstream of the throttle valve when said vacuum passage is opened; and normally closed valve means and opening means therefor for opening said vacuum passage when at least one engine accessory is operated.
Claim 16
Dependent Claim
300 words
An air induction control device for an internal combustion engine having an intake passageway in which a throttle valve is disposed, comprising: means defining an air passage for communicating upstream and downstream sides of the throttle valve in the intake passageway when opened, said air passage being formed with an enlarged section to define a valve seat; a plate type valve member disposed in the enlarged section of said air passage and normally seated on said valve seat to close said air passage, said valve member being movable toward the downstream side of said air passage to separate from said valve seat and thereby open said air passage in response to pressure differential between the upstream and downstream sides of the throttle valve in the intake passageway; a spring disposed in the enlarged section of said air passage to bias said valve member to be seated on said valve seat, said spring being so selected that said valve member separates from said valve seat when said pressure differential exceeds a predetermined level; a diaphragm member defining a vacuum chamber and movable in response to vacuum prevailing in the intake passageway downstream of the throttle valve; a rod member secured to said diaphragm member and contactable to and separable from said valve member so as to move said valve member to open said air passage in accordance with the movement of said diaphragm member; means defining a vacuum passage through which said vacuum chamber and said air passage downstream of said valve member is communicable to supply the vacuum chamber with the vacuum prevailing in the intake passageway downstream of the throttle valve when said vacuum passage is opened; and normally closed valve means and opening means therefor for opening said vacuum passage when at least one engine accessory is operated.
Claim 17
Dependent Claim
145 words
An air induction control device for an internal combustion engine having an intake passageway in which throttle valve is disposed, said device comprising: means defining an air passage bypassing said throttle valve and communicating the upstream and downstream sides of said throttle valve in the intake passageway; a valve member disposed in said air passage and movable toward the downstream side thereof to open said air passage in response to a pressure differential between the upstream and downstream sides of said valve member in said air passage; and a diaphragm member operable, in an operative connection with said valve member, to open said air passage in response to the vacuum prevailing in said intake passageway downstream of the throttle valve, the operative connection between said diaphragm member and said valve member being releasable so that said valve member is operative independently of said diaphragm member.
Claim 18
Dependent Claim
145 words
An air induction control device for an internal combustion engine having an intake passageway in which throttle valve is disposed, said device comprising: means defining an air passage bypassing said throttle valve and communicating the upstream and downstream sides of said throttle valve in the intake passageway; a valve member disposed in said air passage and movable toward the downstream side thereof to open said air passage in response to a pressure differential between the upstream and downstream sides of said valve member in said air passage; and a diaphragm member operable, in an operative connection with said valve member, to open said air passage in response to the vacuum prevailing in said intake passageway downstream of the throttle valve, the operative connection between said diaphragm member and said valve member being releasable so that said valve member is operative independently of said diaphragm member.
Claim 19
Dependent Claim
23 words
An air induction control device as claimed in claim 6, in which said another vacuum chamber is tightly closed except for said orifice.
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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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |