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Patent US4455985A successfully refreshed from Google Patents.
US4455985A
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US
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Electronic control type fuel injection apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1983-09-15
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Granted: 1984-06-26
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Expires: 2003-09-15
Abstract
Abstract An electronic control type fuel injection apparatus comprises a vortex air-flow meter for sensing a suction air-flow rate by generating a frequency output depending upon a vortex air-flow rate depending upon a suction air-flow rate of air fed into an internal combustion engine; a control device for injecting the fuel by actuating an electromagnetic valve for a specific period under substantially synchronizing to the frequency output of said vortex air-flow meter; an air-cleaner placed in the upper-stream of said vortex air-flow meter; and a pressure sensor for sensing variation of pressure of the suction air fed into said vortex air-flow meter which is caused by said air-cleaner, whereby periods for actuating said electromagnetic valve are controlled depending upon the output of said pressure sensor.
Inventors
- 👤 Yoshiaki Asayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:09
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/18; F02D41/185
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
An electronic control type fuel injection apparatus which comprises: a vortex air-flow meter for sensing a suction air-flow rate of air fed into an internal combustion engine and for generating a frequency output indicative of a vortex air-flow rate depending upon a suction air-flow rate sensed by the vortex air-flow meter; a control device for controlling injecting of fuel, including an electromagnetic valve, and means for actuating said valve for a specific period substantially in synchronization with the frequency output of said vortex air-flow meter; an air-cleaner placed upstream of said vortex air-flow meter; and a pressure sensor for sensing variation of pressure of the section air fed into said vortex air-flow meter, which is caused by said air-cleaner; wherein said actuating means controls commencement of actuation of said valve based on the frequency output of said vortex air-flow meter independent of engine speed and controls and duration of actuation of said valve based on the output of said pressure sensor.
Claim 2
Dependent Claim
161 words
An electronic control type fuel injection apparatus which comprises: a vortex air-flow meter for sensing a suction air-flow rate of air fed into an internal combustion engine and for generating a frequency output indicative of a vortex air-flow rate depending upon a suction air-flow rate sensed by the vortex air-flow meter; a control device for controlling injecting of fuel, including an electromagnetic valve, and means for actuating said valve for a specific period substantially in synchronization with the frequency output of said vortex air-flow meter; an air-cleaner placed upstream of said vortex air-flow meter; and a pressure sensor for sensing variation of pressure of the section air fed into said vortex air-flow meter, which is caused by said air-cleaner; wherein said actuating means controls commencement of actuation of said valve based on the frequency output of said vortex air-flow meter independent of engine speed and controls and duration of actuation of said valve based on the output of said pressure sensor.
Claim 3
Dependent Claim
40 words
The electronic control type fuel injection apparatus according to claim 1 wherein said air-cleaner is equipped with a suction air conduit in the upper-stream of said air-cleaner and said pressure sensor also senses pressure variation caused by said air conduit.
Claim 4
Dependent Claim
38 words
The electronic control type fuel injection apparatus according to claim 1 or 2 wherein said pressure sensor is a device for sensing an absolute pressure to sense both of said pressure variation and variation of the atmospheric pressure.
References Cited (Backward Citations)
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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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |