25
Oct
Engines With Direct And Port Injection. Direct injection on the other hand cools the air inside the. With direct injection the fuel is atomized by the extreme pressure used to inject it up to 2200 pounds per square inch psi on the all-new 66L V-8 gas engines offered on the 2020 Chevrolet Silverado HD explained Mike Kociba assistant chief engineer of Small Block engines for General Motors. Toyota introduced this technology which it calls D-4S injection on a V-6 more than a decade ago and now uses port and direct injection on its 20-liter flat-four which is built by Subaru 35-liter V-6 and 50-liter V-8. Adding Stand Alone Controlled Port.
Why Port Injection Was Popular. As the name suggests direct injection involves shooting fuel directly into a. With port injection systems fuel is sprayed into the intake ports. Port fuel injection has been around since the 1980s and means that fuel is delivered to the. This results in an air-fuel mixture that is stratified and the area near the spark plug is richer than the rest of the airfuel mixture. I have two examples in mind.
Fuel is also injected from the direct fuel injector near the end of the compression stroke.
For decades manufactures have known about direction injection and it has been used widely in the market of diesel engine for some time. With port injection engines the fuel injectors will be located in the air intake of the engine. Direct injection on the other hand cools the air inside the. Engines with both direct injection and port fuel injection already exist in serial production. It is well known that Gasoline Direct Injection engines can operate with a higher compression ratio than Port Fuel Injection PFI engines because the evaporative cooling from the fuel can be used to cool the incoming air. There are four basic types of fuel-injection systems in use today.