US4011844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic choke valve apparatus in an internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1975-06-16
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Granted: 1977-03-15
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Expires: 1995-06-16
Abstract
Abstract Automatic choke valve apparatus for an internal combustion engine in which the degree of opening of a choke valve is selectively controlled by a drive pulse motor drivingly coupled to the valve. A pulse circuit controls the pulse motor, and comprises a pulse generator which oscillates at a fixed frequency and produces an output pulse signal for operating the drive pulse motor, and a variable type flicker coupled to the output of the pulse generator for intermittently controlling the output pulse signal in accordance with engine temperature.
Inventors
- 👤 Yoshiaki Hirosawa
- 👤 Toshio Nomura
- 👤 Masahiko Iiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:15
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/06; F02D41/062; F02D41/067
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
In automatic choke valve apparatus for an internal combustion engine in which the degree of opening of a choke valve is selectively controlled by a drive pulse motor drivingly coupled to the valve and a pulse circuit controlling the pulse motor, the improvement wherein said circuit comprises a pulse generator which oscillates at a fixed frequency, and produces an output pulse signal for operation the drive pulse motor, and means coupled to said pulse generator at the output thereof for intermittently controlling the output pulse signal in accordance with engine temperature.
Claim 2
Dependent Claim
91 words
In automatic choke valve apparatus for an internal combustion engine in which the degree of opening of a choke valve is selectively controlled by a drive pulse motor drivingly coupled to the valve and a pulse circuit controlling the pulse motor, the improvement wherein said circuit comprises a pulse generator which oscillates at a fixed frequency, and produces an output pulse signal for operation the drive pulse motor, and means coupled to said pulse generator at the output thereof for intermittently controlling the output pulse signal in accordance with engine temperature.
Claim 3
Dependent Claim
18 words
The improvement as claimed in claim 1 wherein the intermittent control means includes a temperature sensitive variable resistor.
Claim 4
Dependent Claim
37 words
The improvement as claimed in claim 2 wherein the intermittent control means further includes a variable type flicker coupled to said temperature sensitive variable resistor, and including switch means connected to the output of the pulse generator.
Claim 5
Dependent Claim
22 words
The improvement as claimed in claim 1 wherein said pulse motor is of fixed frequency type and rotates at a fixed speed.
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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |