EP0194503A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Intake system for internal combustion engines
Assignee: Mazda Motor Corp
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Filing: 1986-02-25
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Granted: —
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Expires: 2006-02-25
Abstract
Abstract An engine intake system including an intake passage - (9) opening to the combustion chamber through an intake port (7) having an intake valve. A control valve (18) is provided in the intake passage (9) for cyclically opening the intake passage (9). Upstream the control valve (18), the intake passage is provided with a tank (16) which functions to reverse the negative pressure propagated from the control valve (18) into a positive pressure which is then transmitted to the combustion chamber to increase the intake charge. A timing control mechanism (22) is provided for retarding the opening timing of the control valve in a low speed, high load engine operation.
Inventors
- 👤 Mitsuo Hitomi
- 👤 Syunki Okazaki
- 👤 Koji Onishi
- 👤 Junso Sasaki
- 👤 Kazunori Tominaga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 12:05
CPC Classifications
F; F02; F02B; F02B29/00; F02B29/08; F02B29/083; F02B27/00; F02B27/02; F02B27/0205; F02B27/0215; F02B27/0221; F02B27/0294; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
137 words
An intake system for an intemaf combustion engine comprising intake passage means leading to working chamber means of the engine, control valve means provided in said intake passage means for cyclically opening said intake passage means, reversing means provided in said intake passage means upstream said control valve means and spaced apart from said control valve means by a predetermined distance for reversing a negative pressure wave produced in the intake passage means when said control valve means is opened, timing control means for operating said control valve means synchronously with rotation of the engine and retarding opening timing of the control valve means so that the control valve means is opened after a top dead center of the working chamber means by a predetermined value at least in a low speed, high load engine operating range.
Claim 2
Dependent Claim
137 words
An intake system for an intemaf combustion engine comprising intake passage means leading to working chamber means of the engine, control valve means provided in said intake passage means for cyclically opening said intake passage means, reversing means provided in said intake passage means upstream said control valve means and spaced apart from said control valve means by a predetermined distance for reversing a negative pressure wave produced in the intake passage means when said control valve means is opened, timing control means for operating said control valve means synchronously with rotation of the engine and retarding opening timing of the control valve means so that the control valve means is opened after a top dead center of the working chamber means by a predetermined value at least in a low speed, high load engine operating range.
Claim 3
Dependent Claim
31 words
An intake system in accordance with claim 1 in which said timing control means includes means for retarding the opening timing of the control valve means in low speed engine operation.
Claim 4
Dependent Claim
26 words
An intake system in accordance with claim 2 which further includes disasbling means for making the control valve means ineffective under a light load engine operation.
Claim 5
Dependent Claim
52 words
An intake system in accordance with claim 3 in which said disabling means includes bypass passage means for bypassing said control valve means, bypass valve means provided in said bypass passage means for closing the same and valve control means for opening the bypass valve means under the light load engine operation.
Claim 6
Dependent Claim
42 words
An intake system in accordance with claim 4 in which said valve control means includes actuator means which is operated under an intake suction pressure to open the bypass passage means when the intake suction pressure is stronger than a predetermined value.
Claim 7
Dependent Claim
19 words
An intake system in accordance with claim 1 in which said reversing means is intake air reserving tank means.
Claim 8
Dependent Claim
24 words
An intake system in accordance with claim 1 in which said control valve means includes rotary valve means driven by an engine output shaft.
Claim 9
Dependent Claim
46 words
An intake system in accordance with claim 1 in which said timing control means includes phase adjusting means provided in driving means for transmitting an engine rotation to said control valve means for adjusting phasic relationship between an engine output shaft and the control valve means.
Claim 10
Dependent Claim
30 words
An intake system in accordance with claim 3 in which said disabling means is means for advancing opening timing of said control valve means under the light load engine operation.
Claim 11
Dependent Claim
26 words
An intake system in accordance with claim 1 which further includes disabling means for making the control valve means ineffective under a high speed engine operation.
Claim 12
Dependent Claim
133 words
An intake system for an internal combustion engine comprising a plurality of individual intake passage leading respectively to a plurality of working chambers of the engine, surge tank means connected with said individual intake passage means, control valve means provided in respective ones of the individual intake passages for cyclically opening said individual intake passages, communicating passage means connecting said individual passages together, shut-off valve means provided in said communicating passage means for opening said communicating passage means under a light load engine operation, timing control means for operating said control valve means synchronously with rotation of the engine and retarding opening timing of the control valve means so that the control valve means is opened after a top dead center of the working chamber means in a low speed engine operating range.
Claim 13
Dependent Claim
133 words
An intake system for an internal combustion engine comprising a plurality of individual intake passage leading respectively to a plurality of working chambers of the engine, surge tank means connected with said individual intake passage means, control valve means provided in respective ones of the individual intake passages for cyclically opening said individual intake passages, communicating passage means connecting said individual passages together, shut-off valve means provided in said communicating passage means for opening said communicating passage means under a light load engine operation, timing control means for operating said control valve means synchronously with rotation of the engine and retarding opening timing of the control valve means so that the control valve means is opened after a top dead center of the working chamber means in a low speed engine operating range.
Claim 14
Dependent Claim
27 words
An intake system in accordance with claim 11 which further includes means for connecting the communicating passage means with said individual passages upstream the control valve means.
References Cited (Backward Citations)
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