US4798188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling injector
Assignee: Aisan Industry Co Ltd
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Filing: 1987-11-30
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Granted: 1989-01-17
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Expires: 2007-11-30
Abstract
Abstract In an injector for intermittently injecting liquid fuel by supplying a pulse signal to an actuator for reciprocating a valve body, a method of controlling the injector comprises the steps of changing the width of the pulse signal to thereby control an open time of the injector, and also changing a voltage of the pulse signal to thereby control a stroke of the valve body.
Inventors
- 👤 Shoji Ito
- 👤 Mikio Minoura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:47
CPC Classifications
F; F02; F02M; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M51/0675; F02D; F02D41/00; F02D41/20; F02D41/2096; F02D41/30; F02D41/32; F02M51/0603; F02M51/08; F02M61/00; F02M61/16; F02M61/161
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
The method of controlling a fuel injector intermittently injecting liquid fuel to an engine comprising the steps of supplying a pulse signal to an actuator for reciprocating a valve body, varying the stroke of said valve body by a voltage signal applied to a stroke limiting member; changing the width of said pulse signal to thereby control the open time of said injector, and varying the voltage applied to said stroke limiting member to thereby control the stroke of said valve body.
Claim 2
Independent Claim
82 words
The method of controlling a fuel injector intermittently injecting liquid fuel to an engine comprising the steps of supplying a pulse signal to an actuator for reciprocating a valve body, varying the stroke of said valve body by a voltage signal applied to a stroke limiting member; changing the width of said pulse signal to thereby control the open time of said injector, and varying the voltage applied to said stroke limiting member to thereby control the stroke of said valve body.
Claim 3
Dependent Claim
17 words
The method as defined in claim 1, wherein said stroke limiting member comprises a piezoelectric ceramic stack.
Claim 4
Dependent Claim
24 words
The method as defined in claim 1, wherein the voltage signal applied to the stroke limiting member is zero at high fuel flow range.
Claim 5
Dependent Claim
27 words
The method as defined in claim 1, wherein the voltage signal applied to the stroke limiting member is varied continuously to correspond to the fuel flow range.
References Cited (Backward Citations)
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Cited
US4307838A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |