US3580355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic speed control apparatus for automotive vehicles
Assignee: Panasonic Holdings Corp
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Filing: 1968-01-03
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Granted: 1971-05-25
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Expires: 1988-01-03
Abstract
Abstract An apparatus for the steady drive of an automotive vehicle at a predetermined speed setting, having a comparison means for comparing a signal representative of the vehicle running speed with a reference signal representative of the predetermined speed setting and a control means for driving a drive motor output regulator in a speed correcting direction depending on the difference between these two signals. In the apparatus, a third signal is introduced to shift the value of the difference signal and this shifted signal is used to attain the desired stabilization of the running condition of the vehicle.
Inventors
- 👤 Yasushi Kitano
- 👤 Kozo Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:47
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; B; B60; B60K; B60K31/00; B60K31/02; B60K31/04; B60K31/042; F02D41/02; F02D41/0205; F02D9/00; B60W; B60W50/00; B60W2050/0001; B60W2050/0002; B60W2050/0008; B60W2050/0009; B60W2050/0043; B60W2050/0052; B60W2510/00; B60W2510/06; B60W2510/0604; B60W2710/00; B60W2710/06; B60W2710/0605; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0228; F02D2700/023; F02D2700/0238
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
An automatic speed control apparatus for automotive vehicles comprising means for generating a first signal representative of the running speed of an automotive vehicle, means for generating a second signal which is a reference signal having a fixed magnitude, means for varying the magnitude of at least one of said first signal and said second signal in accordance with predetermined speed setting, means for detecting the difference between said two signals after at least one has been varied in accordance with said predetermined speed setting, means for shifting the value of the signal which is representative of the difference between said two signals by applying thereto a third signal obtained by detecting at least one of the values of a variation in the positional operation of motor output regulating means, a variation in the rotational speed of the engine, and acceleration of the vehicle each of which has the absolute value thereof eliminated and means for controlling the motor output regulating means depending on the value of said shifted signal.
Claim 2
Dependent Claim
170 words
An automatic speed control apparatus for automotive vehicles comprising means for generating a first signal representative of the running speed of an automotive vehicle, means for generating a second signal which is a reference signal having a fixed magnitude, means for varying the magnitude of at least one of said first signal and said second signal in accordance with predetermined speed setting, means for detecting the difference between said two signals after at least one has been varied in accordance with said predetermined speed setting, means for shifting the value of the signal which is representative of the difference between said two signals by applying thereto a third signal obtained by detecting at least one of the values of a variation in the positional operation of motor output regulating means, a variation in the rotational speed of the engine, and acceleration of the vehicle each of which has the absolute value thereof eliminated and means for controlling the motor output regulating means depending on the value of said shifted signal.
Claim 3
Dependent Claim
87 words
A automatic speed control apparatus according to claim 1, further comprising a source of light, photoelectrical conversion means, and light shielding means operative in response to the operating position of said motor output regulating means to vary a quantity of light emitted from said source of light toward said photoelectrical conversion means, and said third signal is a signal representative of a variation in the operating position of said motor output regulating means derived by applying a voltage delivered from said photoelectrical conversion means across a capacitor.
Claim 4
Dependent Claim
29 words
An automatic speed control apparatus according to claim 1, wherein a control speed for said means for controlling the motor output regulating means is derived from said first signal.
Claim 5
Dependent Claim
21 words
An automatic speed control apparatus according to claim 3, wherein said signal derived from said first signal is representative of acceleration.
Claim 6
Dependent Claim
48 words
An automatic speed control apparatus according to claim 1, wherein a control speed for said means for controlling the motor output regulating means is derived from the magnitude of said difference signal between said first signal and said second signal after having been shifted by said third signal.
Claim 7
Dependent Claim
45 words
An automatic speed control apparatus accordiNg to claim 1, in which said third signal is obtained by converting the operating position of said motor output regulating means to a voltage signal and differentiating said voltage signal across a capacitor to eliminate the absolute value thereof.
Claim 8
Dependent Claim
45 words
An their speed control apparatus according to claim 1, in which the third signal is a combination of the resultant values of a variation in the positional operation of the motor output regulating means and acceleration of the vehicle, after their absolute values are removed.
Claim 9
Dependent Claim
46 words
An automatic speed control apparatus according to claim 1 wherein a control speed for said means for controlling the motor output regulating means is derived from a combined signal of a difference between said first signal and second signal shifted and a signal representative of acceleration.
Claim 10
Dependent Claim
143 words
An automatic speed control apparatus for automotive vehicles comprising means for generating a first signal representative of the running speed of an automotive vehicle, means for differentiating said first signal to thereby deliver a signal representative of acceleration, means for generating a second signal which is a reference signal having a fixed magnitude, means for varying the magnitude of at least one of said first signal and said second signal in accordance with a predetermined speed setting, means of detecting the difference between a signal, which is the sum of said first signal after having been varied in accordance with said predetermined speed setting and said signal representative of the acceleration, and said second signal after having been varied in accordance with said predetermined speed setting, and means for controlling motor output regulating means depending on the value of said detected difference signal.
Claim 11
Dependent Claim
143 words
An automatic speed control apparatus for automotive vehicles comprising means for generating a first signal representative of the running speed of an automotive vehicle, means for differentiating said first signal to thereby deliver a signal representative of acceleration, means for generating a second signal which is a reference signal having a fixed magnitude, means for varying the magnitude of at least one of said first signal and said second signal in accordance with a predetermined speed setting, means of detecting the difference between a signal, which is the sum of said first signal after having been varied in accordance with said predetermined speed setting and said signal representative of the acceleration, and said second signal after having been varied in accordance with said predetermined speed setting, and means for controlling motor output regulating means depending on the value of said detected difference signal.
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |