A system for detecting the position of a manual gearshift lever, in particular for switch lever of a power-operated transmission for motor vehicles

摘要

the system includes a unit for decoding (a) with a plurality of terminals (1 to 4) and a corresponding plurality of first branches circuitali (21 to 24) connected between a respective tervotes (1 to 4) of the unit (a) and a first pole of a source of voltage (vcc) and including respective resistors over (ra) and a circuit generates signals to position (b).associated with said body of command (l) and with a plurality of outputs (1 to 4) in an orderly manner connected to terminals (1 to 4) of the unit (a) through respective connecting conductors (1114).the circuit (b) includes second branches circuitali (31 to 34) each of which is connected between a respective output (1 to 4) and the second pole of the voltage source (vcc) and includes an interruttore (41 to 44) in which the condition of opening / closing is controlled by said control device (1) in parallel to the switches (41 to 44) being connected to the respective resistors over the bypass (rb).between the resistors over the bypass (rb) and the second terminal of the voltage source (vcc) is interposed at least one additional resistor (ro) (figure 1).