Direct Petrol Injection System with Bosch Motronic MED 7 - Volkspage
Direct Petrol Injection System with Bosch Motronic MED 7 - Volkspage
Direct Petrol Injection System with Bosch Motronic MED 7 - Volkspage
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<strong>Injection</strong> cycle<br />
Fuel is injected during the last third of the<br />
compression stroke. It begins approximately 60°<br />
before ignition TDC ends approximately 45°<br />
before ignition TDC.<br />
The injection point has a major role to play in the<br />
position of the atomised mixture in the area of<br />
the spark plugs.<br />
High-pressure<br />
Injector<br />
Fuel recess<br />
Flow recess<br />
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The fuel is injected in the direction of the fuel<br />
recess.<br />
The injector geometry is such that the atomised<br />
mixture disperses as required.<br />
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The fuel is transported towards the spark plugs<br />
by the fuel recess and the upward movement of<br />
the piston.<br />
This process is aided by the tumble motion of the<br />
air flow, which also transports the fuel to the<br />
spark plugs. The fuel mixes <strong>with</strong> the intake air on<br />
the way to the spark plugs.<br />
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