EP0376299A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Suction apparatus for engine
Assignee: Mazda Motor Corp
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Filing: 1989-12-28
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Granted: —
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Expires: 2009-12-28
Abstract
Abstract A suction apparatus for an engine is provided with an intake path (38) which has an opening portion (16) at one end, and the other end of which is connected to an intake pulsation generation source. A resonator (42) is connected to a downstream portion of said intake path (38) through a connecting pipe (40), 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 (38) which is induced by a compression wave generated from said intake pulsation generation source (32) toward the upstream side.
Inventors
- 👤 Masaki C/O Mazda-Daini Koisoryo 508 Harada
- 👤 Koichi Nagamoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 19:35
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: 16
Claim 1
Independent Claim
96 words
A suction apparatus for an engine, said apparatus comprising: an intake path (38) which has an opening portion (16) at one end, and the other end of which is connected to an intake pulsation generation source (32), characterized by further comprising: first means (40, 42), connected to an downstream portion of said intake path (38), for eliminating a (0.5+n)th-order (where n is an integer equal to or larger than 0) resonant wave in said intake path (38) which is induced by a compression wave generated from said intake pulsation generation source (32) toward the upstream side.
Claim 2
Dependent Claim
96 words
A suction apparatus for an engine, said apparatus comprising: an intake path (38) which has an opening portion (16) at one end, and the other end of which is connected to an intake pulsation generation source (32), characterized by further comprising: first means (40, 42), connected to an downstream portion of said intake path (38), for eliminating a (0.5+n)th-order (where n is an integer equal to or larger than 0) resonant wave in said intake path (38) which is induced by a compression wave generated from said intake pulsation generation source (32) toward the upstream side.
Claim 3
Dependent Claim
48 words
The suction apparatus according to claim 1, characterised in that said first means includes: a resonator (42) which resonates with the (0.5+n)th-order resonant wave in said intake path (38); and a connecting pipe (40) for connecting said resonator (42) to the downstream portion of said intake path (38).
Claim 4
Dependent Claim
18 words
The suction apparatus according to claim 2, characterized in that said resonator (42) comprises a Helmholtz type resonator.
Claim 5
Dependent Claim
78 words
The suction apparatus according to claim 2, characterized in that said resonator (42) and said connecting pipe (40) are set to have characteristics for inducing a resonant wave which generates a maximum positive pressure in a communicating portion of said connecting pipe (40) to said intake path (38) at a timing at which the (0.5+n)th-order resonant wave generated in said intake path (38) generates a minimum sound pressure in a downstream end portion of said intake path (38).
Claim 6
Dependent Claim
51 words
The suction apparatus according to claim 4, characterized in that said connecting pipe (40) is connected to said intake path (38) at a position where a loop of a sound pressure of the (0.5+n)th-order resonant wave in said intake path (38) closest to said intake pulsation generation source (32) is formed.
Claim 7
Dependent Claim
28 words
The suction apparatus according to claim 1, characterized in that said first means (40, 42) is arranged to eliminate a 1.5th-order resonant wave in said intake path (38).
Claim 8
Dependent Claim
20 words
The suction apparatus according to claim 1, characterized in that said intake pulsation generation source comprises a serge tank (32).
Claim 9
Dependent Claim
35 words
The suction apparatus according to claim 1, characterized by further comprising second means (44) for eliminating a resonant wave of an order twice that of the resonant wave eliminated by said first means (40, 42).
Claim 10
Dependent Claim
25 words
The suction apparatus according to claim 8, characterized in that said second means (44) is connected to an upstream portion of said intake path (38).
Claim 11
Dependent Claim
59 words
The suction apparatus according to claim 9, characterized in that said second means (44) is connected to said intake path (38) at a position where a loop of a sound pressure closest to said opening portion (16) in the resonant wave of an order twice that of the resonant wave eliminated by said first means (40, 42) is formed.
Claim 12
Dependent Claim
27 words
The suction apparatus according to claim 8, characterized in that said second means (44) is arranged to eliminate a 3rd-order resonant wave in said intake path (38).
Claim 13
Dependent Claim
38 words
The suction apparatus according to claim 8, characterized in that said second means comprises a silencer (44) for eliminating the resonant wave of an order twice that of the resonant wave eliminated by said first means (40, 42).
Claim 14
Dependent Claim
18 words
The suction apparatus according to claim 12, characterized in that said silencer (44) comprises a side-branch type silencer.
Claim 15
Dependent Claim
56 words
The suction apparatus according to claim 8, characterized in that said second means includes: a second resonator (46) for eliminating the resonant wave of an order twice that of the resonant wave eliminated by said first means (40, 42); and a second connecting pipe (48) for connecting said second resonator (46) to said intake path (38).
Claim 16
Dependent Claim
19 words
The suction apparatus according to claim 14, characterized in that said second resonator (46) comprises a Helmholtz type resonator.
References Cited (Backward Citations)
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