The redesign emphasized improving the combustion process.
For example, there are ways to minimize the heat left behind by the combustion process.
"To control the combustion process, you have to have valves that work in millionths of a second".
Dr Yang is working on a microengine that uses a free-piston design, where the combustion process drives a piston which, in turn, drives a turbine.
It is one of the environmental pollutants generated by internal-combustion engines, resulting from the reaction of nitrogen and oxygen in the air during the combustion process.
The combustion process in a diesel engine is heterogeneous that is, the fuel and air are not premixed prior to initiation of combustion.
This removes the need for creating a special chamber for combustion.The second breakthrough has been to get the combustion process to take place under extremely lean conditions.
As the piston moves away from this position, fuel injection is continued, and the combustion process then appears as a nearly constant-pressure process.
Called the DiesOtto, this 238-horsepower engine uses turbocharging, direct fuel injection and extremely precise control of the combustion process to achieve V-6 levels of power with 4-cylinder economy — about 44 miles per gallon.
After dosing of hydrocarbon fuel the combustion process was initiated.
During the combustion process, high temperature was generated.
