US5040495A
Expired / Lapsed
US
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Suction apparatus for engine
Assignee: Mazda Motor Corp
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Filing: 1989-12-28
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Granted: 1991-08-20
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Expires: 2009-12-28
Abstract
Abstract A suction apparatus for an engine is provided with an intake path which has an opening portion at one end, and the other end of which is connected to an intake pulsation generation source. A resonator is connected to a downstream portion of said intake path through a connecting pipe, for eliminating a (0.5+n)th-order (where n is an integer equal to or larger than 0) resonant wave in the intake path which is induced by a compression wave generated from said intake pulsation generation source toward the upstream side.
Inventors
- 👤 Masaki Harada
- 👤 Koichi Nagamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:36
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02B; F02B27/00; F02B27/008; F02B27/005; F02M35/12; F02M35/1255; F02M35/1261; F02M35/1266; F05; F05C; F05C2225/00; F05C2225/08; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
162 words
A suction apparatus for an engine, said apparatus comprising: an intake path which has an opening portion at one end, and the other end of which is connected to an intake pulsation generation source; a plurality of branch intake pipes, one end of each of which is directly connected to said intake pulsation generation source and the other end of each of which is connected to a corresponding cylinder; and first means, connected to a downstream portion of said intake path, for eliminating a (0.5+n)th-order resonant wave (where n is an integer not less than 0) in said intake path which is induced by a compression wave generated from said intake pulsation generation source toward the upstream side, wherein said first means includes a resonator which resonates with the (0.5+n)th-order resonant wave in said intake path, and a connecting pipe for connecting said resonator to that portion of said intake path which is in close proximity to the intake pulsation generation source.
Claim 2
Dependent Claim
162 words
A suction apparatus for an engine, said apparatus comprising: an intake path which has an opening portion at one end, and the other end of which is connected to an intake pulsation generation source; a plurality of branch intake pipes, one end of each of which is directly connected to said intake pulsation generation source and the other end of each of which is connected to a corresponding cylinder; and first means, connected to a downstream portion of said intake path, for eliminating a (0.5+n)th-order resonant wave (where n is an integer not less than 0) in said intake path which is induced by a compression wave generated from said intake pulsation generation source toward the upstream side, wherein said first means includes a resonator which resonates with the (0.5+n)th-order resonant wave in said intake path, and a connecting pipe for connecting said resonator to that portion of said intake path which is in close proximity to the intake pulsation generation source.
Claim 3
Dependent Claim
15 words
The suction apparatus according to claim 1, wherein said resonator comprises a Helmholtz type resonator.
Claim 4
Dependent Claim
70 words
The suction apparatus according to claim 1, wherein said resonator and said connecting pipe are set to have characteristics for inducing a resonant wave which generates a maximum positive pressure in a communicating portion of said connecting pipe to said intake path at a timing at which the (0.5+n)th-order resonant wave generated in said intake path generates a minimum sound pressure in a downstream end portion of said intake path.
Claim 5
Dependent Claim
45 words
The suction apparatus according to claim 3, wherein said connecting pipe is connected to said intake path at a position where a loop of a sound pressure of the (0.5+n)th-order resonant wave in said intake path closest to said intake pulsation generation source is formed.
Claim 6
Dependent Claim
23 words
The suction apparatus according to claim 1, wherein said first means is arranged to eliminate a 0.5th-order resonant wave in said intake path.
Claim 7
Dependent Claim
17 words
The suction apparatus according to claim 1, wherein said intake pulsation generation source comprises a surge tank.
Claim 8
Dependent Claim
109 words
A suction apparatus for an engine, said apparatus comprising: an intake path which has an opening portion at one end, and the other end of which is connected to an intake pulsation generation source; first means, connected to a downstream portion of said intake path, for eliminating a (0.5+n)th-order resonant wave (where n is an integer not less than 0) in said intake path which is induced by a compression wave generated from said intake pulsation generation source toward the upstream side; and second means, connected to said intake path, for eliminating a resonant wave of an order twice that of the resonant wave eliminated by said first means.
Claim 9
Dependent Claim
109 words
A suction apparatus for an engine, said apparatus comprising: an intake path which has an opening portion at one end, and the other end of which is connected to an intake pulsation generation source; first means, connected to a downstream portion of said intake path, for eliminating a (0.5+n)th-order resonant wave (where n is an integer not less than 0) in said intake path which is induced by a compression wave generated from said intake pulsation generation source toward the upstream side; and second means, connected to said intake path, for eliminating a resonant wave of an order twice that of the resonant wave eliminated by said first means.
Claim 10
Dependent Claim
21 words
The suction apparatus according to claim 7, wherein said second means is connected to an upstream portion of said intake path.
Claim 11
Dependent Claim
52 words
The suction apparatus according to claim 8, wherein said second means is connected to said intake path at a position where a loop of a sound pressure closest to said opening portion in the resonant wave of an order twice that of the resonant wave eliminated by said first means is formed.
Claim 12
Dependent Claim
23 words
The suction apparatus according to claim 7, wherein said second means is arranged to eliminate a 3rd-order resonant wave in said intake path.
Claim 13
Dependent Claim
33 words
The suction apparatus according to claim 7, wherein said second means comprises a silencer for eliminating the resonant wave of an order twice that of the resonant wave eliminated by said first means.
Claim 14
Dependent Claim
15 words
The suction apparatus according to claim 11, wherein said silencer comprises a side-branch type silencer.
Claim 15
Dependent Claim
48 words
The suction apparatus according to claim 7, where said second means includes: a second resonator for eliminating the resonant wave of an order twice that of the resonant wave eliminated by said first means; and a second connecting pipe for connecting said second resonator to said intake path.
Claim 16
Dependent Claim
16 words
The suction apparatus according to claim 13, wherein said second resonator comprises a Helmholtz type resonator.
Claim 17
Dependent Claim
23 words
The suction apparatus according to claim 7, wherein said first means is arranged to eliminate a 1,5th-order resonant wave in said intake path.
Claim 18
Dependent Claim
17 words
The suction apparatus according to claim 7, wherein said intake pulsation generation source comprises a surge tank.
Claim 19
Dependent Claim
142 words
A suction apparatus for an engine, said apparatus comprising: an intake path which has an opening portion at one end, and the other end of which is connected to an intake pulsation generation source; a plurality of branch intake pipes, one end of each of which is directly connected to said intake pulsation generation source and the other end of each of which is connected to a corresponding cylinder; and first means, connected to a downstream portion of said intake path, for eliminating a (0.5+n)th-order resonant wave (where n is an integer not less than 0) in said intake path which is induced by a compression wave generated from said intake pulsation generation source toward the upstream side, wherein said first means is connected to that portion of said intake path which is in close proximity to said intake pulsation generation source.
Claim 20
Dependent Claim
142 words
A suction apparatus for an engine, said apparatus comprising: an intake path which has an opening portion at one end, and the other end of which is connected to an intake pulsation generation source; a plurality of branch intake pipes, one end of each of which is directly connected to said intake pulsation generation source and the other end of each of which is connected to a corresponding cylinder; and first means, connected to a downstream portion of said intake path, for eliminating a (0.5+n)th-order resonant wave (where n is an integer not less than 0) in said intake path which is induced by a compression wave generated from said intake pulsation generation source toward the upstream side, wherein said first means is connected to that portion of said intake path which is in close proximity to said intake pulsation generation source.
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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) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |