US4438664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for operating the drive of a vehicle
Assignee: Volkswagen AG
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Filing: 1981-09-22
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Granted: 1984-03-27
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Expires: 2001-09-22
Abstract
Abstract A system is provided for fuel-efficiently operating an engine in a vehicle wherein the vehicle engine is coupled through a clutch to an infinitely variable ratio gear driving a planetary gear train. A clutch pedal actuates the clutch, and an accelerator pedal is coupled to the fuel delivery mechanism of the engine. A first storage unit is responsive to the position of the accelerator pedal and selects a stored value for the ratio of the infinitely variable ratio gear. A drive unit is provided for adjusting the ratio of the infinitely variable gear in response to the selected value from the first storage. A second storage unit is responsive to the position of the accelerator pedal and selects a stored value for a fuel delivery mechanism. A third storage unit is responsive to the position of the clutch pedal and selects a stored value for the fuel delivery mechanism. A comparison unit is coupled to the second and third storage units for selecting the smaller of the values for the fuel delivery mechanism. A drive unit is provided for adjusting the fuel delivery mechanism in response to the value selected by the comparison unit.
Inventors
- 👤 Ernst Fiala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:19
CPC Classifications
F; F02; F02N; F02N11/00; F02N11/08; F02N11/0814; F02N11/0818; F16; F16H; F16H37/00; F16H37/02; F16H37/021; F16H37/022; F16H61/00; F16H61/66; F16H61/662; F16H61/66254; F16H61/66259; F02N2200/00; F02N2200/08; F02N2200/0801; F02N2200/10; F02N2200/101; F02N2200/103; F02N2300/00; F02N2300/20; F02N2300/2002; F02N5/00; F02N5/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
250 words
In a vehicle drive having an internal combustion engine coupled through a clutch to an infinitely variable transmission, the transmission having input cone pulleys and output cone pulleys and driving a reversible planetary gear train for imparting motive power to an axle, a clutch pedal for acutating the clutch, and an accelerator pedal coupled to the fuel delivery mechanism of the engine; a system for operating the drive comprising: control signal generating means for controlling the infinitely variable transmission and including first storage means responsive to the position of said accelerator pedal for selecting a first stored value corresponding to a gear ratio of said infinitely variable transmission according to a plot of gear ratio vs. accelerator pedal position; means for adjusting the gear ratio of said infinitely variable transmission in response to said selected value; second storage means responsive to the position of said accelerator pedal for selecting a second stored value for said fuel delivery mechanism according to a plot of said second stored value vs. accelerator pedal position; third storage means responsive to the position of said clutch pedal for selecting a third stored value for said fuel delivery mechanism according to a plot of said third stored value vs. clutch pedal position; comparison means coupled to said second and third storage means for selecting the smaller of said second and third stored values for said fuel delivery mechanism; and means for adjusting said fuel delivery mechanism in response to said value selected by said comparison means.
Claim 2
Dependent Claim
250 words
In a vehicle drive having an internal combustion engine coupled through a clutch to an infinitely variable transmission, the transmission having input cone pulleys and output cone pulleys and driving a reversible planetary gear train for imparting motive power to an axle, a clutch pedal for acutating the clutch, and an accelerator pedal coupled to the fuel delivery mechanism of the engine; a system for operating the drive comprising: control signal generating means for controlling the infinitely variable transmission and including first storage means responsive to the position of said accelerator pedal for selecting a first stored value corresponding to a gear ratio of said infinitely variable transmission according to a plot of gear ratio vs. accelerator pedal position; means for adjusting the gear ratio of said infinitely variable transmission in response to said selected value; second storage means responsive to the position of said accelerator pedal for selecting a second stored value for said fuel delivery mechanism according to a plot of said second stored value vs. accelerator pedal position; third storage means responsive to the position of said clutch pedal for selecting a third stored value for said fuel delivery mechanism according to a plot of said third stored value vs. clutch pedal position; comparison means coupled to said second and third storage means for selecting the smaller of said second and third stored values for said fuel delivery mechanism; and means for adjusting said fuel delivery mechanism in response to said value selected by said comparison means.
Claim 3
Dependent Claim
121 words
The system of claim 1 and further comprising: a motive means for disengaging said clutch; means for actuating said motive means; a first switch means connected in circuit with said actuating means for enabling actuation of the motive means at deflections of said accelerator pedal below a preset small value; and a second switch means connected in circuit with said actuating means and said first switch means for enabling actuation of the motive means when said vehicle speed exceeds a preset value, said first and second switch means being connected to cause the motive means to actuate when both the deflection of said accelerator pedal is below said preset small value and the speed of said vehicle exceeds said preset value.
Claim 4
Dependent Claim
45 words
The system of claim 2 and further comprising: an idling disconnect means coupled to said engine; and means connecting the idling disconnect means for actuation of the idling disconnect substantially as said clutch disengaging motive means is operated by said first and second switch means.
Claim 5
Dependent Claim
33 words
The system of claim 3 wherein said means connecting the idling disconnect means for actuation of the idling disconnect comprises means connecting the idling disconnect means with the first and second switch means.
Claim 6
Dependent Claim
113 words
The system of claim 4 and further comprising: a starter motor coupled to said engine; first starter switch means connected in circuit with said starter motor for enabling actuation of the starter motor at deflections of said clutch pedal beyond a predetermined position; and second starter switch means connected in circuit with said starter motor and said first starter switch means for enabling actuation of the starter motor when said vehicle travels below a predetermined speed, said first and second starter switch means being connected to cause the starter motor to actuate when both the deflection of said clutch pedal is beyond said predetermined position and said vehicle travels 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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |