KSB injection timing advance system (Renault Espace III)

The KSB cold injection advance solenoid valve is controlled by the engine control unit. It is activated by applying voltage for at least 8 seconds after starting, then it is activated or deactivated depending on various parameters:

• air and coolant temperatures when the ignition is turned on (Fig. 3.24);
• in high-altitude areas, the KSB is switched off significantly later depending on the air temperature. Thus, the excitation time of the electromagnetic valve is increased;
• in all cases, KSB is deactivated if the engine speed exceeds 2250 min⁻¹, when the engine is running at full load.