US3868933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion motor
Assignee: Volkswagen AG
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Filing: 1972-09-20
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Granted: 1975-03-04
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Expires: 1992-09-20
Abstract
Abstract A combustion motor in combination with a device for the automatic quantitative controlling of the air intake through a suction canal including a throttle valve, an apparatus for measuring the number of revolutions of the motor and deriving an actual value signal therefrom, a desired value source for providing an electrical magnitude corresponding to the desired value of the number of revolutions of the motor, a device for deriving the difference between the actual value and desired value magnitudes, and a switching logic for determining the control relationship affecting the positioning means of the throttle valve.
Inventors
- 👤 Erhard Bigalke
- 👤 Werner Buttgereit
- 👤 Dieter Pundt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:22
CPC Classifications
F; F02; F02D; F02D31/00; F02D31/001; F02D31/002; F02D31/003; F02D31/005; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0228; F02D2700/023; F02D2700/0238; F02D2700/0243
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
303 words
A combustion motor comprising an air intake canal, throttle valve means in said canal determining the rate of air flow through said canal, a throttle valve switch operatively connected to said throttle valve means, said switch being closed during deceleration operation of the motor and said throttle valve means being moved into its closed position during deceleration operation of the motor and idling, a device for automatically controlling the motor speed during operation modes of the motor different from load and deceleration fuel shut off, said device comprising by-pass canal means bypassing said throttle valve means, a control throttle disposed in said by-pass canal means and comprising an electrical positioning arrangement, first means for measuring the actual value of the motor Speed and deriving an electrical actual value signal therefrom, second means for providing an electrical desired value signal corresponding to the desired value of the motor speed, difference deriving means having input and output means, said first and second means being operatively connected to said input means of said difference deriving means, said positioning arrangement of said control throttle being operatively connected to said output means, switching means operatively connected to said input means, said switching means comprising a semiconductor device having a control electrode connectable via said throttle valve switch to an electrical potential adapted to block said semiconductor device and further connected to an electrical circuit point having an electrical potential also adapted to block said semiconductor device only during deceleration fuel shut off, said input means being connectable via said semiconductor device to an electrical potential adapted to block said difference deriving means, whereby during load operation and deceleration fuel shut off no electrical signal representing the difference between actual value and desired value of the motor speed is fed to said positioning arrangement from said difference deriving means.
Claim 2
Dependent Claim
303 words
A combustion motor comprising an air intake canal, throttle valve means in said canal determining the rate of air flow through said canal, a throttle valve switch operatively connected to said throttle valve means, said switch being closed during deceleration operation of the motor and said throttle valve means being moved into its closed position during deceleration operation of the motor and idling, a device for automatically controlling the motor speed during operation modes of the motor different from load and deceleration fuel shut off, said device comprising by-pass canal means bypassing said throttle valve means, a control throttle disposed in said by-pass canal means and comprising an electrical positioning arrangement, first means for measuring the actual value of the motor Speed and deriving an electrical actual value signal therefrom, second means for providing an electrical desired value signal corresponding to the desired value of the motor speed, difference deriving means having input and output means, said first and second means being operatively connected to said input means of said difference deriving means, said positioning arrangement of said control throttle being operatively connected to said output means, switching means operatively connected to said input means, said switching means comprising a semiconductor device having a control electrode connectable via said throttle valve switch to an electrical potential adapted to block said semiconductor device and further connected to an electrical circuit point having an electrical potential also adapted to block said semiconductor device only during deceleration fuel shut off, said input means being connectable via said semiconductor device to an electrical potential adapted to block said difference deriving means, whereby during load operation and deceleration fuel shut off no electrical signal representing the difference between actual value and desired value of the motor speed is fed to said positioning arrangement from said difference deriving means.
Claim 3
Dependent Claim
17 words
The combination as claimed in claim 1, wherein said difference deriving means comprises a difference power amplifier.
Claim 4
Dependent Claim
25 words
The combination as claimed in claim 1, said device further comprising an integrating means for the setting of a time constant for said regulating process.
References Cited (Backward Citations)
US3715006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |