EP0105934A1
Expired / Lapsed
EP
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Intake system of an internal-combustion engine
Assignee: Yamaha Motor Co Ltd
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Filing: 1982-08-18
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Granted: —
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Expires: 2002-08-18
Abstract
Abstract An internal combustion engine is provided with an auxiliary intake passage (11,11') which opens into an intake passage (3, 3') immediately downstream of a valve stem (7a, 7a') of an intake valve (7, 7') with respect to the flow direction of the intake air flowing towards a combustion chamber (2, 2'). As a result, the disturbances of the intake air flow immediately downstream of the valve stem are eleminated by the intake air flow coming from said auxiliary intake passage.
Inventors
- 👤 Hiromitsu Matsumoto
- 👤 Takahiro Nagura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 09:57
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/10242; F02M35/10308; F02B; F02B31/00; F02B31/08; F02B31/085; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02M35/10006; F02M35/10072; F02M35/104; F02M35/108; F02B1/00; F02B1/02; F02B1/04; F02B2275/00; F02B2275/18; F02F2001/244; F02F2001/245; F02M35/1085
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
An internal combustion engine of the type having an intake valve (7) which is arranged at the downstream end of an intake passage (3,3') such as to have its valve stem (7a, 7a') intersecting the flow of intake air into a combustion chamber (7), characterized in that an auxiliary intake passage (11, 11') is provided which opens with one end into said intake passage (3,3') immediately downstream of said valve stem (7a, 7a') with respect to the intake air flow direction.
Claim 2
Dependent Claim
81 words
An internal combustion engine of the type having an intake valve (7) which is arranged at the downstream end of an intake passage (3,3') such as to have its valve stem (7a, 7a') intersecting the flow of intake air into a combustion chamber (7), characterized in that an auxiliary intake passage (11, 11') is provided which opens with one end into said intake passage (3,3') immediately downstream of said valve stem (7a, 7a') with respect to the intake air flow direction.
Claim 3
Dependent Claim
47 words
Internal combustion engine according to claim 1, characterized in that said auxiliary intake passage (11, 11') extends through the wall of a cylinder head (b, b') and is connected to the respective intake passages (3,3') of each further cylinder (a, a') via a communication pipe (14, 14').
Claim 4
Dependent Claim
22 words
Internal combustion engine according to claim 1, characterized in that said auxiliary intake passage (11) is connected to a plenum chamber (15).
Claim 5
Dependent Claim
37 words
Internal combustion engine according to claim 1, characterized in that said auxiliary intake passage (11) has its other end connected to a portion of the intake passage (3) which is located upstream of said valve stem (7a)·
Claim 6
Dependent Claim
22 words
Internal combustion engine according to claim 4, characterized in that a by-pass conduit (16) is provided which by-passes said valve stem (7a).
Claim 7
Dependent Claim
22 words
Internal combustion engine according to claim 1, characterized in that a throttle valve (17) is disposed within the auxiliary intake passage (11).
Claim 8
Dependent Claim
32 words
Internal combustion engine according to claim 6, characterized in that said throttle valve (17) is disposed in a conduit (18) which connects said auxiliary intake passage (11) with a communication pipe (14').
Claim 9
Dependent Claim
41 words
Internal combustion engine according to claim 7, characterized in that said communication pipe (14') is connected to a carburetor (20) while by-passing a throttle valve (21) which is located in the intake passage (3') upstream of said intake valve stem (7a').
References Cited (Backward Citations)
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