US5133307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air intake system for marine propulsion unit engine
Assignee: Yamaha Marine Co Ltd
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Filing: 1990-11-06
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Granted: 1992-07-28
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Expires: 2010-11-06
Abstract
Abstract An air intake system for a marine propulsion engine having a U shaped configuration for facilitating water separation and to provide a long intake passage. An air flow sensor is positioned at the inlet opening of the inlet device with the length between the inlet opening and the intake ports being effective to dampen pulsations in the induction system from the air flow device.
Inventors
- 👤 Noboru Kurihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:15
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/16; F02M35/165; F02M35/167; F02B; F02B61/00; F02B61/04; F02B61/045; F02M35/02; F02M35/0201; F02M35/021; F02M35/10; F02M35/10006; F02M35/10013; F02M35/10242; F02M35/10295; F02M35/10373; F02M35/10386; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B75/16; F02B75/18; F02B2075/1804; F02B2075/1824; F02B75/22
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
87 words
An induction system for a marine engine having at least one horizontally extending intake port constituting the lowest intake port of said engine in a vertical direction, said induction system comprising a first generally vertically extending inlet passage having an inlet opening at its upper end for receiving atmospheric air, a second generally vertically extending inlet passage communicating at an upper portion thereof with said intake port, and a U shaped section communicating the lower ends of said inlet passages with each other below said intake port.
Claim 2
Dependent Claim
87 words
An induction system for a marine engine having at least one horizontally extending intake port constituting the lowest intake port of said engine in a vertical direction, said induction system comprising a first generally vertically extending inlet passage having an inlet opening at its upper end for receiving atmospheric air, a second generally vertically extending inlet passage communicating at an upper portion thereof with said intake port, and a U shaped section communicating the lower ends of said inlet passages with each other below said intake port.
Claim 3
Dependent Claim
25 words
An induction system as set forth in claim 1 further including an air flow meter positioned adjacent the inlet opening of the first inlet passage.
Claim 4
Dependent Claim
32 words
An induction system as set forth in claim 1 further including an intake device communicating with the inlet opening and extending across the upper ends of the first and second inlet passages.
Claim 5
Dependent Claim
31 words
An induction system as set forth in claim 3 wherein the inlet device has a downwardly facing opening for receiving atmospheric air adjacent the upper end of the second inlet passage.
Claim 6
Dependent Claim
37 words
An induction system as set forth in claim 4 wherein there are provided a multitude of inlet ports vertically spaced relative to each other and each communicating with the second inlet passage above said U shaped section.
Claim 7
Dependent Claim
22 words
An induction system as set forth in claim 5 wherein the intake ports are all formed at one end of the engine.
Claim 8
Dependent Claim
19 words
An induction system as set forth in claim 6 wherein the engine is a two cycle crankcase compression engine.
Claim 9
Dependent Claim
21 words
An induction system as set forth in claim 7 wherein the intake ports open into the crankcase chambers of the engine.
Claim 10
Dependent Claim
35 words
An induction system as set forth in claim 8 wherein the engine has a V configuration with multiple intake ports for each bank with the intake ports disposed in side by side vertically spaced orientation.
Claim 11
Dependent Claim
30 words
An induction system as set forth in claim 1 wherein the engine is provided with a multitude of vertically spaced inlet ports all formed at one end of the engine.
Claim 12
Dependent Claim
19 words
An induction system as set forth in claim 10 wherein the engine is a two cycle crankcase compression engine.
Claim 13
Dependent Claim
21 words
An induction system as set forth in claim 11 wherein the intake ports open into the crankcase chambers of the engine.
Claim 14
Dependent Claim
35 words
An induction system as set forth in claim 12 wherein the engine has a V configuration with multiple intake ports for each bank with the intake ports disposed in side by side vertically spaced orientation.
Claim 15
Dependent Claim
32 words
An induction system as set forth in claim 10 further including an intake device communicating with the inlet opening and extending across the upper ends of the first and second inlet passages.
Claim 16
Dependent Claim
40 words
An induction system as set forth in claim 1 wherein the second inlet passage is aligned generally with the intake port and the first inlet passage is disposed to one side of the inlet port and said second inlet passage.
Claim 17
Dependent Claim
32 words
An induction system as set forth in claim 15 wherein there are provided a multitude of inlet ports vertically spaced relative to each other and each communicating with the second inlet passage.
Claim 18
Dependent Claim
22 words
An induction system as set forth in claim 16 wherein the intake ports are all formed at one end of the engine.
Claim 19
Dependent Claim
19 words
An induction system as set forth in claim 15 wherein the engine is a two cycle crankcase compression engine.
Claim 20
Dependent Claim
32 words
An induction system as set forth in claim 18 wherein there are provided a multitude of inlet ports vertically spaced relative to each other and each communicating with the second inlet passage.
Claim 21
Dependent Claim
21 words
An induction system as set forth in claim 19 wherein the intake ports open into the crankcase chambers of the engine.
Claim 22
Dependent Claim
32 words
An induction system as set forth in claim 20 wherein the second inlet passage is offset from the center of the intake port in a direction away from the first intake passage.
Claim 23
Dependent Claim
35 words
An induction system as set forth in claim 20 wherein the engine has a V configuration with multiple intake ports for each bank with the intake ports disposed in side by side vertically spaced orientation.
Claim 24
Dependent Claim
48 words
An induction system as set forth in claim 22 wherein there is provided a vertically extending dividing wall extending at least in part through the second inlet passage dividing the second inlet passage into first and second portions communicating with the intake ports of the respective cylinder banks.
Claim 25
Dependent Claim
32 words
An induction system as set forth in claim 23 wherein the second inlet passage is offset from the center of the intake port in a direction away from the first intake passage.
Claim 26
Dependent Claim
52 words
An induction system as set forth in claim 22 further including a throttle valve in the first intake passage for controlling the flow therethrough, said throttle valve being positioned above the lowermost intake port and supported for rotation on a throttle valve shaft that extends through the first and second inlet passages.
Claim 27
Dependent Claim
27 words
An induction system as set forth in claim 25 further including a throttle valve position sensor affixed to the throttle valve shaft adjacent the second inlet passage.
Claim 28
Dependent Claim
32 words
An induction system as set forth in claim 22 further including an intake device communicating with the inlet opening and extending across the upper ends of the first and second inlet passages.
Claim 29
Dependent Claim
31 words
An induction system as set forth in claim 27 wherein the inlet device has a downwardly facing opening for receiving atmospheric air adjacent the upper end of the second inlet passage.
Claim 30
Dependent Claim
48 words
An induction system as set forth in claim 14 wherein there is provided a vertically extending dividing wall extending at least in part through the second inlet passage dividing the second inlet passage into first and second portions communicating with the intake ports of the respective cylinder banks.
Claim 31
Dependent Claim
32 words
An induction system as set forth in claim 29 wherein the second inlet passage is offset from the center of the intake port in a direction away from the first intake passage.
Claim 32
Dependent Claim
92 words
An induction system for a marine engine having at least one horizontally extending intake port, said induction system comprising a first generally vertically extending inlet passage having an inlet opening at its upper end for receiving atmospheric air, a second generally vertically extending inlet passage communicating at an upper portion thereof with said intake port, a U shaped section communicating the lower ends of said inlet passages with each other, and an intake device communicating with said inlet opening and extending across the upper ends of the first and second inlet passages.
Claim 33
Dependent Claim
92 words
An induction system for a marine engine having at least one horizontally extending intake port, said induction system comprising a first generally vertically extending inlet passage having an inlet opening at its upper end for receiving atmospheric air, a second generally vertically extending inlet passage communicating at an upper portion thereof with said intake port, a U shaped section communicating the lower ends of said inlet passages with each other, and an intake device communicating with said inlet opening and extending across the upper ends of the first and second inlet passages.
Claim 34
Dependent Claim
31 words
An induction system as set forth in claim 31 wherein the inlet device has a downwardly facing opening for receiving atmospheric air adjacent the upper end of the second inlet passage.
Claim 35
Dependent Claim
32 words
An induction system as set forth in claim 31 wherein there are provided a multitude of inlet ports vertically spaced relative to each other and each communicating with the second inlet passage.
Claim 36
Dependent Claim
22 words
An induction system as set forth in claim 33 wherein the inlet ports are all formed at one end of the engine.
Claim 37
Dependent Claim
19 words
An induction system as set forth in claim 22 wherein the engine is a two cycle crankcase compression engine.
Claim 38
Dependent Claim
21 words
An induction system as set forth in claim 35 wherein the intake ports open into the crankcase chambers of the engine.
Claim 39
Dependent Claim
35 words
An induction system as set forth in claim 36 wherein the engine has a V configuration with multiple intake ports for each bank with the intake ports disposed in side by side vertically spaced orientation.
Claim 40
Dependent Claim
48 words
An induction system as set forth in claim 37 wherein there is provided a vertically extending dividing wall extending at least in part through the second inlet passage dividing the second inlet passage into first and second portions communicating with the intake ports of the respective cylinder banks.
Claim 41
Dependent Claim
32 words
An induction system as set forth in claim 38 wherein the second inlet passage is offset from the center of the intake port in a direction away from the first intake passage.
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) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |