US5117799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for a supercharged internal combustion engine
Assignee: Subaru Corp
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Filing: 1990-04-20
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Granted: 1992-06-02
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Expires: 2010-04-20
Abstract
Abstract A control system for an internal combustion engine having an air pump provided in an intake passage for supplying air into a cylinder of the engine. A continuously variable belt-drive automatic transmitting device is provided between a crankshaft of the engine and a drive shaft of the air pump. The transmitting device control unit is controlled by a control unit in accordance with operating conditions of the engine. A throttle valve is provided upstream of the air pump.
Inventors
- 👤 Hitoshi Suzuki
- 👤 Shinji Kamimaru
- 👤 Shigeru Ando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:45
CPC Classifications
F; F02; F02B; F02B39/00; F02B39/02; F02B39/04; F02D; F02D41/00; F02D41/0002; F02D41/0007; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
190 words
A control system for an internal combustion engine for a motor vehicle having a crankshaft, an intake passage and an air pump provided on the intake passage for supplying air into a cylinder of the engine, the system comprising: a dive shaft provided on the air pump for operating the pump; a transmitting device comprising an automatic change speed device, an input shaft operatively connected to the crankshaft of the engine and an output shaft connected to the drive shaft of the air pump; a throttle valve provided in the intake passage at an upstream side of the air pump; an accelerator pedal operatively connected to said throttle valve for operating the throttle valve so as to be completely opened when depressing degree of said accelerator pedal is larger than a predetermined angle; and means comprising a control unit for controlling the transmitting device in accordance with said depressing degree of said accelerator pedal to change the output of the engine when said accelerator pedal depressing degree is larger than said predetermined angle so as to reduce driving torque of the air pump and to prevent knocking of the engine.
Claim 2
Dependent Claim
190 words
A control system for an internal combustion engine for a motor vehicle having a crankshaft, an intake passage and an air pump provided on the intake passage for supplying air into a cylinder of the engine, the system comprising: a dive shaft provided on the air pump for operating the pump; a transmitting device comprising an automatic change speed device, an input shaft operatively connected to the crankshaft of the engine and an output shaft connected to the drive shaft of the air pump; a throttle valve provided in the intake passage at an upstream side of the air pump; an accelerator pedal operatively connected to said throttle valve for operating the throttle valve so as to be completely opened when depressing degree of said accelerator pedal is larger than a predetermined angle; and means comprising a control unit for controlling the transmitting device in accordance with said depressing degree of said accelerator pedal to change the output of the engine when said accelerator pedal depressing degree is larger than said predetermined angle so as to reduce driving torque of the air pump and to prevent knocking of the engine.
Claim 3
Dependent Claim
16 words
The system according to claim 1, wherein the transmitting device is a continuously variable belt-drive transmission.
Claim 4
Dependent Claim
52 words
The system according to claim 1, further comprising linking means operatively connecting said accelerator pedal to said throttle valve and for gradually opening said throttle valve in dependency on increasing of said depressing degree of said accelerator pedal when the depressing degree of said accelerator pedal is smaller than said predetermined angle.
Claim 5
Dependent Claim
24 words
The system according to claim 1, wherein said predetermined angle represents an upper limit of an extreme light load range output by the engine.
Claim 6
Dependent Claim
59 words
The system according o claim 1, wherein said means comprising said control unit is further for setting a change speed ratio of said automatic change speed device to a predetermined ratio when said depressing degree of said accelerator pedal is less than said predetermined angle also as to reduce pumping loss at an extreme light load of the engine.
Claim 7
Dependent Claim
67 words
The system according to claim 5, wherein said means comprising said control unit is further for setting said change speed ratio small at a low supercharging pressure when said depressing degree of said accelerator pedal is less than said predetermined angle and for changing said change speed ratio and increasing the supercharging pressure as the depression degree of the accelerator pedal increases lager than said predetermined angle.
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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) | 1995-06-02 | 1995-12-02 | 1996-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-02 | 1999-12-02 | 2000-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-02 | 2003-12-02 | 2004-06-02 | $7700.00 | Window Closed / Lapsed |