The proposed device is suitable for installation on most models cars. It prevents incorrect connection of the starter when working the engine has a high reliability, which is achieved by the introduction of an RC circuit, which protects the device from the effects of contact bounce ignition switch in the time of start-up and operation of the starter.
The device is connected to the electrical circuits of the car (ignition switch SA1 and traction relay K1 are part of the car's electrical system). A locking device pin 2 and 3 are included to break the wire from the castle ignition by pulling the relay K1. The device consists of a switching VS1 and locking VS2 keys and chains to start them.
Design and details. In commuting the key you can apply any SCR from CU, should be selected instance with possible large resistance of the Manager transition (not less than 100 Ohms) for forward and reverse current through it. The value of the this resistance depends on the required capacitance of the capacitor C1. SCR VS2 type CU with any letter index. Diode VD1 type CDI, VD2 type D; capacitor type K50-6; type resistors MLT.
During Assembly it is necessary to consider that the device will be operated in harsh conditions (high and low temperature, strong vibration, humidity, the contact device oil, etc.).
Adjustment is not required if the device is accurately collected from a healthy details. At the time, when you open SCR VS1, recharging occurs capacitor C1 output from 2 through managing the transition of SCR and a resistor R1. With this charging current flows through managing the transition of SCR in reverse (non-operating) direction. It could be fixed by addition of one diode D between the cathode and the control electrode of SCR (anode to cathode of the SCR). In the presence of this diode to pick up almost SCR is not required.
Author: A. Kuzema