Powertrain specialist Delphi Technologies' shift away from diesels has pushed it to take its gasoline-powered systems to a new level. The supplier also is working on what it calls "next-generation cruise control. Harry Husted, Delphi Tech's global director of product, electrification and electronics, shared more on the solutions with Automotive News Europe Correspondent Peter Sigal.
Delphi has announced a 500-bar direct-injection system for gasoline engines, compared with the current 350-bar solution. What are some of the benefits?
Our goal is to reduce particulate emissions, and we have been able to do that by up to 50 percent. The hard part is getting an injector to hold that pressure, so we have redesigned components, especially the pumping system, to handle 500 bar [pressure]. One issue with the pump is leakage around the plunger, and we have a new innovation in that area to reduce that leak in a really efficient way.
How much more efficiency is there left to gain from gasoline or diesel engines, without taking electrification into account?
That's a tough question. No matter how far we think we have gotten, engineers continue to do better. People are focused on the combustion chamber and the event itself: Getting the air/fuel mixture in, getting swirl and mixing, and getting a really effective combustion. Inside the combustion chamber, the injector is critical for shaping combustion, so that's what we are focusing on.