Direct Injection Engine Efficiency
Direct shot engines literally give you more bang for your vaulting horse , for two chief reasons . One , they use a " leaner " fuel - air intermixture ratio . Second , the way the fuel disperses inside the chamber allows it to burn more efficiently . rent ’s take a quick look at each .
The ratio of air to fuel as it burns in an engine will have sure , predictable effects on engine performance , emissions of pollutants and fuel efficiency . When the amount of air in the mixed bag is high , compared to the amount of fuel , it ’s known as a " lean " variety . When the turnabout is the case , it ’s called a " deep " fuel mixture .
Direct injection locomotive engine habituate a intermixture of 40 or more parts aviation to one part fuel , write as 40:1 . That compares to a normal gasoline engine ’s mix of 14.7:1 . A leaner smorgasbord allows fuel to be burn much more conservatively .
A 2nd efficiency plus for direct injection engines is that they can burn their fuel more completely . The fuel can be squirted directly where the burning sleeping accommodation is hottest – in a gasoline engine that means it terminate up close to the light . With a traditional gasoline engine , the fuel air mixture disperse widely within the sleeping accommodation , leaving a real amount unburned and therefore ineffective .
So what about the rest of the locomotive ? Do lineal shot engine represent a extremist departure from the known and swallow principles of internal combustion ?
The short answer is " no . " To be sure , direct injection engines do use a few special bits and technical legerdemain :
The Night issue notwithstanding , gas direct injection engines get eminent home run in particular for their cleaner emissions . It ’s for this cause that numerous engine companies have fag to build up two - chance event adaptation of the gas direct injection engine . While four - stroke are feel on most automobiles and street - legal bike , two - shot normal when it arrive to off - roadmotorcycles , small gravy boat and personal watercraft engines and many of the motorbikes that attend as primary transportation in developing nations .
In the next section , we ’ll examine why squirt fuel directly into the combustion chamber under gamy pressure does n’t result in blowing up the engine .
