US4354464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air intake arrangement for diesel engine
Assignee: Mazda Motor Corp
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Filing: 1980-12-01
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Granted: 1982-10-19
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Expires: 2000-12-01
Abstract
Abstract An improved air intake arrangement for Diesel engine in which an intake air shutter valve is provided in an intake air passage of the engine for closing the intake air passage when the degree of depression of an accelerator pedal is small, especially in engine idling and speed retardation, i.e. during non-load period, so as to reduce engine vibrations and noises during light-load operation by throttling the intake air passage or reducing the substantial effective passage area, and also deterioration of combustion is prevented by reducing throttling effect of the intake air shutter valve or increasing the passage area during cold period of the engine, while braking effect of an exhaust brake is maintained also by reducing throttling effect of the shutter valve or increasing the passage area.
Inventors
- 👤 Teruhiro Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:27
CPC Classifications
F; F02; F02M; F02M3/00; F02M3/06; F02M3/07; F02D; F02D11/00; F02D11/06; F02D11/08; F02D9/00; F02D9/02; F02D9/04; F02B; F02B1/00; F02B1/02; F02B1/04; F02B3/00; F02B3/06; F02D2009/0201; F02D2009/0223; F02D2009/0242; F02D2009/0244; F02D2009/0252; F02D2009/0279; F02D41/00; F02D41/0002; F02D2041/0022; F02D9/08; F02D9/10; F02D9/1035; F02D9/1055
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
244 words
In a system including a diesel engine and a starter motor for starting the diesel engine, the diesel engine having an air intake passage for introducing air into a combustion chamber of the diesel engine, an exhaust passage, and an injection nozzle means, directed into the combustion chamber, for supplying fuel into the combustion chamber so as to effect combustion by injecting the fuel into the air which is compressed in the combustion chamber so as to be raised in its temperature, an improved air intake arrangement which comprises: means, including an air intake shutter valve, provided in the air intake passages, for controlling the size of the air passage area of the air intake passage; means for establishing an intake negative pressure at the downstream side of said shutter valve of between 100 and 400 mmHg by closing said shutter valve during idling of the diesel engine, and for fully opening said shutter valve during medium to high engine loads; and said controlling means including a correction means, responsive to both the temperature of the diesel engine and operation of the starter motor, for increasing the size of the air passage area of the air intake passage while the diesel engine is warming up and during operation of the starter motor, to a size which is larger than the size of the air passage area of the air intake passage while the diesel engine is idling after the diesel engine has warmed up.
Claim 2
Dependent Claim
244 words
In a system including a diesel engine and a starter motor for starting the diesel engine, the diesel engine having an air intake passage for introducing air into a combustion chamber of the diesel engine, an exhaust passage, and an injection nozzle means, directed into the combustion chamber, for supplying fuel into the combustion chamber so as to effect combustion by injecting the fuel into the air which is compressed in the combustion chamber so as to be raised in its temperature, an improved air intake arrangement which comprises: means, including an air intake shutter valve, provided in the air intake passages, for controlling the size of the air passage area of the air intake passage; means for establishing an intake negative pressure at the downstream side of said shutter valve of between 100 and 400 mmHg by closing said shutter valve during idling of the diesel engine, and for fully opening said shutter valve during medium to high engine loads; and said controlling means including a correction means, responsive to both the temperature of the diesel engine and operation of the starter motor, for increasing the size of the air passage area of the air intake passage while the diesel engine is warming up and during operation of the starter motor, to a size which is larger than the size of the air passage area of the air intake passage while the diesel engine is idling after the diesel engine has warmed up.
Claim 3
Dependent Claim
24 words
An air intake arrangement as in claim 1, wherein said correction means includes means for increasing the degree of opening of said shutter valve.
Claim 4
Dependent Claim
53 words
An air intake arrangement as in claim 1, wherein said correction means includes a structure having a passage for by-passing said shutter valve and a valve device for selectively opening and closing said passage for by-passing said shutter valve while the diesel engine is warming up and during operation of the starter motor.
Claim 5
Dependent Claim
52 words
An air intake arrangement as in claim 1, further including an exhaust brake valve in said exhaust passage and means for closing said exhaust brake valve and concurrently affecting said correction means to increase the size of the air passage area of the air intake passage during retardation of the diesel engine.
Claim 6
Dependent Claim
76 words
An air intake arrangement as in claim 4, wherein the size of the air passage area of the air intake passage during the retardation of the diesel engine is larger than the size of the air passage area of the air intake passage while the diesel engine is warmed up and is idling, and is smaller than the size of the air passage area of the air intake passage while said shutter valve is fully opened.
Claim 7
Dependent Claim
31 words
An air intake arrangement as in claim 5, wherein said correction means comprises means for establishing an air intake negative pressure of 15 to 70 mmHg downstream of said shutter valve.
Claim 8
Dependent Claim
112 words
An air intake arrangement as in claim 1, wherein said controlling means includes means, responsive to a first signal, for moving said air shutter valve to vary the size of the air passage area of the air intake passage; means for generating a second signal indicative of the quantity of fuel being directed into the combustion chamber by the injection nozzle means; means for generating a third signal indicative of the speed of the diesel engine; means for generating a fourth signal indicative of the temperature of the diesel engine; and computer means, responsive to said second, third and fourth signals, for generating and transmitting to said moving means said first signal.
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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) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |