US4726389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling injector valve
Assignee: Aisan Industry Co Ltd
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Filing: 1986-12-11
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Granted: 1988-02-23
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Expires: 2006-12-11
Abstract
Abstract In an injector for intermittently injecting liquid fuel by supplying a pulse signal to an actuator and reciprocating an injector valve, a method of controlling the injector valve comprising the steps of temporarily cutting supply of a pulse signal to the actuator to suppress inertia of the injector valve and thereby stabilize opening characteristics of the valve just before full opening of the valve during an opening stroke of the valve, and temporarily supplying the pulse signal after the cutting step of the pulse signal to the actuator to suppress inertia of the injector valve and thereby stabilize closing characteristics of the valve just before full closing of the valve during a closing stroke of the valve.
Inventors
- 👤 Mikio Minoura
- 👤 Shoji Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:35
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/20; F02D41/2096; F02M; F02M51/00; F02M51/06; F02M51/0603; F02M51/08; F02D2041/202; F02D2041/2037; F02D2200/00; F02D2200/02; F02D2200/06; F02D2200/063; Y; Y10; Y10S; Y10S239/00; Y10S239/90; Y10T; Y10T137/00; Y10T137/0318
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
117 words
In an injector for intermittently injecting liquid fuel by supplying a pulse signal to an actuator and reciprocating an injector valve, a method of controlling said injector valve comprising the steps of temporarily cutting supply of the pulse signal to said actuator to suppress inertia of said injector valve and thereby stabilize opening characteristics of said valve just before full opening of said valve during an opening stroke of said valve, and temporarily supplying the pulse signal after the cutting step of the pulse signal to said actuator to suppress inertia of said injector valve and thereby stabilze closing characteristics of said valve just before full closing of said valve during a closing stroke of said valve.
Claim 2
Dependent Claim
117 words
In an injector for intermittently injecting liquid fuel by supplying a pulse signal to an actuator and reciprocating an injector valve, a method of controlling said injector valve comprising the steps of temporarily cutting supply of the pulse signal to said actuator to suppress inertia of said injector valve and thereby stabilize opening characteristics of said valve just before full opening of said valve during an opening stroke of said valve, and temporarily supplying the pulse signal after the cutting step of the pulse signal to said actuator to suppress inertia of said injector valve and thereby stabilze closing characteristics of said valve just before full closing of said valve during a closing stroke of said valve.
Claim 3
Dependent Claim
73 words
The method as defined in claim 1, wherein said step of temporarily cutting the supply of the pulse signal to said actuator is effected at a timing of at least about 70% of the opening stroke of said valve, and said step of temporarily supplying the pulse signal after the cutting step of the pulse signal is effected at a timing of at least about 70% of the closing stroke of said valve.
Claim 4
Dependent Claim
15 words
The method as defined in claim 1, wherein said actuator comprises a stacked piezoelectric ceramics.
Claim 5
Dependent Claim
71 words
In an injector for intermittently injecting liquid fuel by supplying a pulse signal to an actuator and reciprocating an injector valve, a method of controlling said injector valve comprising the step of temporarily cutting supply of a pulse signal to said actuator to suppress inertia of said injector valve and thereby stabilze opening characteristics of said valve just before full opening of said valve during an opening stroke of said valve.
Claim 6
Dependent Claim
71 words
In an injector for intermittently injecting liquid fuel by supplying a pulse signal to an actuator and reciprocating an injector valve, a method of controlling said injector valve comprising the step of temporarily cutting supply of a pulse signal to said actuator to suppress inertia of said injector valve and thereby stabilze opening characteristics of said valve just before full opening of said valve during an opening stroke of said valve.
Claim 7
Dependent Claim
39 words
The method as defined in claim 4, wherein said step of temporarily cutting the supply of the pulse signal to said actuator is effected at a timing of at least about 70% of the opening stroke of said valve.
Claim 8
Dependent Claim
15 words
The method as defined in claim 4, wherein said actuator comprises a stacked piezoelectric ceramics.
Claim 9
Dependent Claim
66 words
In an injector for intermittently injecting liquid fuel by supplying a pulse signal to an actuator and reciprocating an injector valve, a method of controlling said injector valve comprising the step of temporarily supplying the pulse signal just before full closing of said valve during a closing stroke of said valve to suppress inertia of said injector valve and thereby stabilize closing characteristics of said valve.
Claim 10
Dependent Claim
66 words
In an injector for intermittently injecting liquid fuel by supplying a pulse signal to an actuator and reciprocating an injector valve, a method of controlling said injector valve comprising the step of temporarily supplying the pulse signal just before full closing of said valve during a closing stroke of said valve to suppress inertia of said injector valve and thereby stabilize closing characteristics of said valve.
Claim 11
Dependent Claim
33 words
The method as defined in claim 7, wherein said step of temporarily supplying the pulse signal is effected at a timing of at least about 70% of the closing stroke of said valve.
Claim 12
Dependent Claim
15 words
The method as defined in claim 7, wherein said actuator comprises a stacked piezoelectric ceramics.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |