Petrol Multi Injection
An engine control device for a gasoline direct injection engine with charging pressure control, electronic throttle, start-stop, thermal management and appropriate exhaust gas treatment needs despite manual
transmission and CAN bus still need more than 150 line connections with at least two connectors. The fuel system consists of demand-driven low pressure (up to 200 bar) and high pressure (2 to 6 bar). A return line
does not exist.
Just as the multiple ignition and injection are common in diesel, it is also available in petrol engines. Up to 3 are possible in power-intensive operating conditions such as the cold start, the heating of the catalyst, or
close to full load. If the fuel is distributed in such a manner, not so much must to be injected at one time. As a result unnecessary wetting of the combustion chamber components is avoided..
Who looks at the videos of the tests on single cylinder engine involuntarily may realize that not everything must come from a particular theory. In this environment and with the equipment of actuators, such as the
electrically controlled boost pressure are just possible many combinations and relatively immediate indication of success.
| With partial glass cylinder shots of the combustion process possible. |
The distribution within the three injections is often significantly less spread over the last two injections. The result is a little attachment to the cylinder walls. With this method even a touch of stratified charge is possible.
And when is injected only one time? Of course, in the partial load range at lower speeds. 03/16
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