Contents: Pre-heating when ignition is turned…🠛 Starting the engine 🠛 Post-heating with the engine running 🠛
The pre-heating and post-heating systems are controlled by the control unit.
Pre-heating when ignition is turned on
Pre-heating is carried out in two phases:
- a) variable preheating - depends on the coolant temperature at the moment the ignition is turned on (Fig. 4.48). In all cases, the control lamp lights for no more than 15 s.
- b) Continuous preheating. After the preheating indicator lamp (variable preheating) goes out, voltage is supplied to the glow plugs for another 10 seconds before the engine starts.
Fig. 4.48. Dependence of the engine preheating activation time on the coolant temperature in the variable preheating mode
Starting the engine
The glow plugs remain energized while the starter is running.
Post-heating with the engine running
During this phase, voltage is continuously supplied to the glow plugs depending on the coolant temperature (Fig. 4.49).
Fig. 4.49. Dependence of the time of voltage supply to the glow plugs on the coolant temperature when the engine is idling without pressing the accelerator pedal