US4570591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for controlling throttling of intake air and pressure of fuel injection in diesel engine
Assignee: Toyota Motor Corp
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Filing: 1985-01-07
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Granted: 1986-02-18
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Expires: 2005-01-07
Abstract
Abstract A system for controlling the throttling of intake air and pressure of fuel injection in a diesel engine, including an intake air throttling mechanism in an intake air passage and a fuel injection apparatus in a swirl chamber. The fuel injection pressure of the fuel injection apparatus is variable. The intake air throttling mechanism is operated in accordance with predetermined operating parameters of the engine to reduce the fuel injection pressure when necessary.
Inventors
- 👤 Atsushi Hashikawa
- 👤 Tetsuro Kikuchi
- 👤 Kazutaka Katoh
- 👤 Satosi Kuwakado
- 👤 Noriaki Kawai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:18
CPC Classifications
F; F02; F02D; F02D43/00; F02D11/00; F02D11/06; F02D11/10; F02D41/00; F02D41/30; F02D41/38; F02D9/00; F02D9/02; F02M; F02M61/00; F02M61/16; F02M61/20; F02M61/205; F02B; F02B3/00; F02B3/06; F02D2009/0201; F02D2009/0223; F02D2009/023; F02D2009/0244; F02D41/0002; F02D2041/0022; F02D2200/00; F02D2200/02; F02D2200/04; F02D2200/0406; F02D2200/06; F02D2200/0602; F02D2250/00; F02D2250/31
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
A system for controlling throttling of intake air in an intake air passage and pressure of fuel injection in a swirl chamber of a diesel engine, comprising: an intake air throttling mechanism provided in said intake air passage; a fuel injection apparatus provided in said swirl chamber, the valve opening pressure of said fuel injection apparatus being variable; and means for controlling said intake air throttling mechanism and said fuel injection apparatus, said control means reducing the valve opening pressure of said fuel injection apparatus when closing said intake air throttling in accordance with predetermined operating parameters of said engine.
Claim 2
Independent Claim
100 words
A system for controlling throttling of intake air in an intake air passage and pressure of fuel injection in a swirl chamber of a diesel engine, comprising: an intake air throttling mechanism provided in said intake air passage; a fuel injection apparatus provided in said swirl chamber, the valve opening pressure of said fuel injection apparatus being variable; and means for controlling said intake air throttling mechanism and said fuel injection apparatus, said control means reducing the valve opening pressure of said fuel injection apparatus when closing said intake air throttling in accordance with predetermined operating parameters of said engine.
Claim 3
Dependent Claim
17 words
A system as set forth in claim 1, wherein said fuel injection apparatus comprises a Pintaux nozzle.
Claim 4
Dependent Claim
95 words
A system as set forth in claim 1, wherein said control means comprises: means for determining whether the speed of said engine is lower than a predetermined speed; means for determining whether the coolant temperature of said engine is higher than a predetermined temperature; means for determining whether an accelerator is depressed; and means for closing said intake air throttling mechanism and reducing the valve opening pressure of said fuel injection apparatus when the speed is lower than said predetermined speed, the coolant temperature is lower than said temperature and the accelerator is not depressed.
Claim 5
Dependent Claim
58 words
A system as set forth in claim 1, wherein said control means continuously closes said intake air throttling mechanism and continuously reduces the valve opening pressure of said fuel injection apparatus in accordance with the speed of said engine, the coolant temperature of said engine, the accelerator angle of said engine, and said intake-air pressure of said engine.
Claim 6
Dependent Claim
23 words
A system as set forth in claim 1, wherein said intake air throttling mechanism is controlled by activating an actuator using negative pressure.
Claim 7
Dependent Claim
20 words
A system as set forth in claim 4, wherein said intake air throttling mechanism is actuated by a linear solenoid.
Claim 8
Dependent Claim
24 words
A system as set forth in claim 1, wherein the valve opening pressure of said fuel injection apparatus is controlled by a linear solenoid.
Claim 9
Dependent Claim
23 words
A system as set forth in claim 1, wherein the valve opening pressure of said fuel injection apparatus is controlled by oil pressure.
Claim 10
Dependent Claim
23 words
A system as set forth in claim 1, wherein the valve opening pressure of said fuel injection apparatus is controlled by a screw.
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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) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |