Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1979-03-21
1982-09-28
Bonck, Rodney H.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
B60K 4106, B60K 4128
Patent
active
043512054
ABSTRACT:
In an automotive vehicle having an engine connected to a gear-type transmission via a torque converter and a 1x converter-bridging clutch, an electronic circuit for automatically shifting the transmission and operating the clutch comprises a comparison-pulse generator emitting pulses having durations varying in accordance with engaged gear ratio and engine-loading conditions, these pulses being fed to the data inputs of a pair of D-type flip-flops for a time comparison with clock-input signals from a multiplexer/counter having periods proportional to the rotation rate of a converter turbine during a first processing phase of a time-division operating cycle and to the rotation rate of a transmission output shaft during a second processing phase. The flip-flops generate upshifting and downshifting signals for updating the contents of a converter-clutch store during the first phase and of a gear-state store during the second phase, the gear-state store being connected via an output circuit to gear-shift actuators in the transmission. The control device includes a read-only memory (VP) responsive to a gear-state signal from the gear-state store and to drive-program signals from a program selector for preventing the updating of the gear-state store by an upshifting signal when the engaged gear state is the maximum for the selected drive program. The device has another read-only memory (ZP) responsive to gear-state signals and a gear-change signal from a detector/comparator (GK) for modifying the moduli of counters (UZ, RZ, VWZ, OWZ) controlling the durations of respective gear-change operations.
REFERENCES:
patent: 3604288 (1971-09-01), Mori
patent: 3741042 (1973-06-01), Ravenel
patent: 3885472 (1975-05-01), Wakamatsu et al.
patent: 4039061 (1977-08-01), Pruvot et al.
patent: 4044634 (1977-08-01), Florus et al.
patent: 4140031 (1979-02-01), Sibeud et al.
patent: 4208925 (1980-06-01), Miller et al.
patent: 4208929 (1980-06-01), Heino et al.
Bonck Rodney H.
Ross Karl F.
Zahnradfabrik Friedrichshafen
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