US4369676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kick-down circuit for automatic change-speed transmissions
Assignee: Daimler Benz AG
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Filing: 1980-07-21
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Granted: 1983-01-25
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Expires: 2000-07-21
Abstract
Abstract A kick-down circuit for an automatic change-speed transmission with a kick-down control member transmitting a kick-down control signal when an accelerator or gas pedal is floored and with at least one gearshift control element operating in dependence upon a transmission output speed and a position of the gas pedal for an auxiliary operating force of a shift actuating member participating in a shifting between a higher gear and a lower gear. The gearshift control element, upon an occurrence of the kick-down control signal, may be brought into its position for the lower gear under the effect of an auxiliary control force dependent upon a position of the gas pedal. The kick-down control signal is temporally limited independently of the position of the gas pedal.
Inventors
- 👤 Hermann Gaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:24
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0262; F16H61/0265; F16H61/0267; F16H59/00; F16H59/14; F16H59/18; F16H59/20; F16H61/0202; F16H61/0251; F16H2061/026
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
68 words
A kick-down circuit for an automatic change-speed transmission, the circuit including a kick-down control means for transmitting a kick-down control signal when an accelerator pedal of the vehicle in which the transmission is installed is depressed to a predetermined position, characterized in that means are provided for limiting a duration of the kick-down control signal for a predetermined time period independently of a position of the accelerator pedal.
Claim 2
Dependent Claim
68 words
A kick-down circuit for an automatic change-speed transmission, the circuit including a kick-down control means for transmitting a kick-down control signal when an accelerator pedal of the vehicle in which the transmission is installed is depressed to a predetermined position, characterized in that means are provided for limiting a duration of the kick-down control signal for a predetermined time period independently of a position of the accelerator pedal.
Claim 3
Dependent Claim
100 words
A kick-down circuit according to claim 1, characterized in that the circuit further includes at least one gearshift control element operable in dependence upon an output speed of the transmission and a position of the accelerator pedal for generating an auxiliary operating force of a shift actuating member shiftable between a higher gear and a lower gear, and in that the gearshift control element is adapted to be brought into a position for the lower gear under the effect of an auxiliary control force dependent upon a position of the accelerator pedal upon an occurrence of the kick-down control signal.
Claim 4
Dependent Claim
25 words
A kick-down circuit according to one of claims 1 or 2, characterized in that the limiting means is adapted to pulsate the kick-down control signal.
Claim 5
Dependent Claim
42 words
A kick-down circuit according to claim 1, characterized in that said limiting means includes a precontrol element operatively connected to the kick-down control means, and in that the precontrol element is controlled by the accelerator pedal and operates in dependence upon time.
Claim 6
Dependent Claim
84 words
A kick-down circuit according to claim 1, characterized in that the circuit further includes a gearshift valve means operable in dependence upon an output speed of the transmission and a position of the accelerator pedal, a precontrol valve operatively connected with the gearshift valve means and the kick-down control means, a first control valve operatively connected with the gearshift valve means, precontrol valve, and kick-down control member, and a further control valve operatively connected to the first control valve and the gearshift valve means.
Claim 7
Dependent Claim
92 words
A kick-down circuit according to claim 5, characterized in that the gearshift valve means includes a displaceable valve body, a compression spring means for normally biasing the valve body means in a downshifting direction, and a plurality of control recesses respectively communicating with control recesses of the precontrol valve, first control valve, and said second control valve in dependence upon a positioning of the displaceable valve body means, and in that a control pressure line is provided for operatively connecting the control valve with said precontrol valve and said kick-down control means.
Claim 8
Dependent Claim
49 words
A kick-down circuit according to one of claims 1, 5, or 6, characterized in that the kick-down control means is a solenoid valve, and in that the limiting means is a timer switch connected to the solenoid valve, said timer switch is adapted to pulse the kick-down control signal.
Claim 9
Dependent Claim
27 words
A kick-down circuit according to claim 1, wherein the means for limiting duration of the kick-down control signal comprises a means for pulsing the kick-down control 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) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |