Cold start timer switch works

When the engine is cold state , the timer switch contacts are closed . When a cold start , the ignition switch is in the start position , the starter power supply terminal , a current flows . Current from the battery through the ignition switch, cold start injector , timer switch bimetal , contacts, ground to form a loop , so that the cold start injector nozzle . At the same time , but also a current flowing through the timer switches the heating coil , two heating coils to heat the bimetal , which is bent when opening Camshaft Position Sensor contacts , the cold start injector to stop fuel injection. After starting , the starter switch is turned off , the ignition switch from the starting position to the open position , no current flows through the cold start injector, to stop fuel injection. Meanwhile, the two heating coils are turned off , but this time the engine is in a warm state , which temperature rises enough to bend the bimetal , the contacts are open, that is the normal operation of the engine , the cold start injector time switch contacts remain disconnected state, not the cold start injector fuel injection . Car manufacturers are based on its own design requirements of the cold start injector time switch operating temperature , such as Nissan series of 18 ℃ below , Toyota series is below 35 ℃ . The lower the temperature , the cold start injector working longer . Injector cold start fuel injection valve opening time depends on the length of time .