Launch
After starting the engine, an increased amount of fuel is supplied for a few seconds for the so-called post-start increase in speed. The temperature sensor reports the coolant temperature to the control unit, which instructs the pressure regulator to increase the pressure at the control slot. Higher pressure delivers more fuel to enrich the mixture. The amount of fuel depends on the temperature of the coolant.
Warming up
When the engine warms up, the pressure regulator reduces the pressure. This ensures proper fuel supply.
Idling
On a low power engine, an auxiliary air duct using a control unit (in the central mounting block) can only be set to "open" or "closed". The above-described precise stabilization of engine speed is carried out by a control unit on a five-cylinder engine.
Acceleration
When the engine is cold, when the accelerator pedal is depressed, a richer mixture is injected. Operation in this mode is carried out in the same way as when raising the speed after starting.
Lambda regulation
For normal operation of the catalyst, a constant transition from a slightly over-enriched to somewhat lean mixture is necessary. The lambda probe reports the composition of the exhaust gases in the exhaust manifold at the moment to the control unit, which in a split second gives "order" the pressure regulator to increase or decrease the fuel pressure and, accordingly, determines the required amount of fuel supplied.
Height correction
On the 2.3 liter engine, atmospheric pressure influences mixture preparation, which prevents too much fuel from being fed into the engine when driving in high altitude areas where the air is thinner.
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