US3645241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bistable throttle control system
Assignee: Motors Liquidation Co
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Filing: 1970-04-16
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Granted: 1972-02-29
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Expires: 1990-04-16
Abstract
Abstract A throttle valve the complete closure of which is prevented by a throttle stop that is advanced by electrically activated vacuum means above a preset speed of an engine responsive to the setting of the throttle valve and retracted below this speed. Pulse generating means connected with the engine provide an input to a timing stage that is operatively connected by capacitor, Zener diode, and amplifier means to means that advance and retract the throttle stop when the speed of the engine is respectively above and below the preset speed.
Inventors
- 👤 Gerald O Huntzinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:25
CPC Classifications
F; F02; F02D; F02D31/00; F02D31/001; F02D31/002; F02D31/003
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
171 words
In a motor vehicle comprising a voltage source, an engine having throttle means for controlling the speed thereof, and means normally biasing said throttle means towards a closed position, a throttle control system comprising: a. throttle stop means operable to prevent complete closure of said throttle means; b. signal generating and shaping means for developing a pulsating signal proportional to the speed of said engine; c. frequency responsive means connected with said signal generating and shaping means and operative in response to said pulsating signal for producing a first output when the speed of said engine is above a predetermined speed and a second output when the speed of said engine is below said predetermined speed; and d. a constant impedance breakdown device responsive to said first and second outputs for controlling said throttle stop means whereby said throttle means is prevented from complete closure while the engine speed is above said predetermined speed and said throttle means is closed when the speed of said engine drops below said predetermined speed.
Claim 2
Dependent Claim
171 words
In a motor vehicle comprising a voltage source, an engine having throttle means for controlling the speed thereof, and means normally biasing said throttle means towards a closed position, a throttle control system comprising: a. throttle stop means operable to prevent complete closure of said throttle means; b. signal generating and shaping means for developing a pulsating signal proportional to the speed of said engine; c. frequency responsive means connected with said signal generating and shaping means and operative in response to said pulsating signal for producing a first output when the speed of said engine is above a predetermined speed and a second output when the speed of said engine is below said predetermined speed; and d. a constant impedance breakdown device responsive to said first and second outputs for controlling said throttle stop means whereby said throttle means is prevented from complete closure while the engine speed is above said predetermined speed and said throttle means is closed when the speed of said engine drops below said predetermined speed.
Claim 3
Dependent Claim
290 words
In a motor vehicle comprising a voltage source, an engine having throttle means for controlling the speed thereof, and means normally biasing said throttle means towards a closed position, a throttle control system comprising: a. throttle stop means operable to prevent complete closure of said throttle means; b. signal generating and shaping means for developing a pulsating signal proportional to the speed of said engine; c. first timing means connected with said signal generating and shaping means and operative in response to said pulsating signal for producing a first output when the speed of said engine is above a predetermined speed and a second output when the speed of said engine is below said predetermined speed; d. second timing means comprising a transistor connected with said first timing means to receive said first and second output signals therefrom, a resistor connected with said transistor and said source and a capacitor connected with said resistor, whereby said capacitor is charged to a predetermined voltage through said resistor when the output of said first timing means is one of said first and second output signals and is discharged through said transistor before attaining said predetermined voltage when the output of said first timing means is the other of said first and second output signals; e. a constant impedance breakdown device connected with said capacitor and operative to break down when said capacitor is charged to said predetermined voltage; and f. utilization means connected with said constant impedance breakdown device and operable to control said throttle stop means whereby said throttle means is prevented from complete closure while the engine speed is above said predetermined speed and said throttle means is closed when the speed of said engine drops below said predetermined speed.
Claim 4
Dependent Claim
290 words
In a motor vehicle comprising a voltage source, an engine having throttle means for controlling the speed thereof, and means normally biasing said throttle means towards a closed position, a throttle control system comprising: a. throttle stop means operable to prevent complete closure of said throttle means; b. signal generating and shaping means for developing a pulsating signal proportional to the speed of said engine; c. first timing means connected with said signal generating and shaping means and operative in response to said pulsating signal for producing a first output when the speed of said engine is above a predetermined speed and a second output when the speed of said engine is below said predetermined speed; d. second timing means comprising a transistor connected with said first timing means to receive said first and second output signals therefrom, a resistor connected with said transistor and said source and a capacitor connected with said resistor, whereby said capacitor is charged to a predetermined voltage through said resistor when the output of said first timing means is one of said first and second output signals and is discharged through said transistor before attaining said predetermined voltage when the output of said first timing means is the other of said first and second output signals; e. a constant impedance breakdown device connected with said capacitor and operative to break down when said capacitor is charged to said predetermined voltage; and f. utilization means connected with said constant impedance breakdown device and operable to control said throttle stop means whereby said throttle means is prevented from complete closure while the engine speed is above said predetermined speed and said throttle means is closed when the speed of said engine drops below said predetermined speed.
Claim 5
Dependent Claim
313 words
In a motor vehicle comprising an engine having throttle means for controlling the speed thereof and means biasing said throttle means towards a closed position, a throttle control system for preventing closure of said throttle means until said engine speed falls below a predetermined speed comprising: a. a source of constant potential; b. signal generating and shaping means for developing a pulsating signal proportional to the speed of the said engine; c. first timing means comprising a first transistor connected with said signal generating and shaping means, a resistor connected with said source and said first transistor, a capacitor connected with said first transistor and said resistor, and a unijunction transistor connected with said capacitor whereby said unijunction transistor produces a first output when the speed of said engine is above said predetermined speed and a second output when the speed of said engine is below said predetermined speed; d. second timing means comprising a second transistor connected with said unijunction transistor to receive said first and second output signals therefrom, a second resistor connected with said second transistor and said source, and a second capacitor connected with said second resistor, whereby said second capacitor is charged to a predetermined voltage through said resistor when the output from said first timing means is one of said first and second output signals and is discharged through said second transistor before attaining said predetermined voltage when the output of said first timing means is the other of said first and second output signals; e. a constant impedance breakdown device connected with said second capacitor and operative to breakdown when said second capacitor is charged to said predetermined voltage; and f. utilization means connected with said constant impedance breakdown device and operative upon the break down thereof to prevent complete closure of said throttle means until the speed of said engine drops below said predetermined speed.
Claim 6
Dependent Claim
313 words
In a motor vehicle comprising an engine having throttle means for controlling the speed thereof and means biasing said throttle means towards a closed position, a throttle control system for preventing closure of said throttle means until said engine speed falls below a predetermined speed comprising: a. a source of constant potential; b. signal generating and shaping means for developing a pulsating signal proportional to the speed of the said engine; c. first timing means comprising a first transistor connected with said signal generating and shaping means, a resistor connected with said source and said first transistor, a capacitor connected with said first transistor and said resistor, and a unijunction transistor connected with said capacitor whereby said unijunction transistor produces a first output when the speed of said engine is above said predetermined speed and a second output when the speed of said engine is below said predetermined speed; d. second timing means comprising a second transistor connected with said unijunction transistor to receive said first and second output signals therefrom, a second resistor connected with said second transistor and said source, and a second capacitor connected with said second resistor, whereby said second capacitor is charged to a predetermined voltage through said resistor when the output from said first timing means is one of said first and second output signals and is discharged through said second transistor before attaining said predetermined voltage when the output of said first timing means is the other of said first and second output signals; e. a constant impedance breakdown device connected with said second capacitor and operative to breakdown when said second capacitor is charged to said predetermined voltage; and f. utilization means connected with said constant impedance breakdown device and operative upon the break down thereof to prevent complete closure of said throttle means until the speed of said engine drops below said predetermined 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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |