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An assisted control device step by step of a speed box with relationships or staged marks (Machine-translation by Google Translate, not legally binding)
An assisted control device step by step of a speed box with relationships or staged marks (Machine-translation by Google Translate, not legally binding)
Improvements introduced in the object of the main patent no. 375,051, requested on december 30, 1969 by an assisted step-by-step control device of a speed box with stepped ratios or gears, comprising a manual pulse generator selector that includes two contacts that allow to generate, one, impulses of ascent, the other, impulses of descent of the speeds, which are transformed into respective output steps in signals of duration calibrated by monostable circuits and applied in the electrical relays of subordinate organs of the gearbox, clutch and throttle valve that perform the sequence of the usual operations associated with a change of ratio, in which the manual pulse generator selector includes a handle that acts on the contacts that allow generating the manual impulses of ascent and descent, has two different positions that corresponds, one, to a driving mode manual, the other, to an automatic driving mode and, in the automatic control position of the selector, pulses are transmitted to the output steps, in parallel with pulses of the manual generator, by an automatic information signal processing device. Input from a generator of a control voltage, function of vehicle speed and torque, whose treatment apparatus includes a group of N-1 circuits in parallel for the ascent of the speeds and a group of N-1 circuits in parallel for the descent of the speeds (n being the number of forward speeds), each of them including a level detector step that swings from a first state to a second state when the control voltage reaches a threshold to which the speed change must be carried out, according to the main patent, characterized in that the output of a step level detector of a speed rise circuit, associated with a torque of determined gearbox ratios, is linked by means of a capacitor and a resistor in parallel, in turn in series with an isolating diode, at the input of the velocity descent circuit associated with the same pair of ratios of box. (Machine-translation by Google Translate, not legally binding)
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