TodayApril 16, 2022

Is HCCI the engine of the future? on Driving the Nation

For years I’ve been hearing about homogeneous charge compression ignition (HCCI) in gasoline engines, but no action had been taken. Recently at a Bosch event, in the left bottom corner of a gasoline display was the HCCI emblem. Is HCCI still an option for the future?

Hakan Yilmaz, Bosch’s Global Technology Management, Gasoline Systems, explained to Lou Ann Hammond, CEO,, that gasoline is the prevalent fuel source for as long as we can see. HCCI is an advanced combustion that gives the gasoline engine the fuel efficiency of a diesel engine.

The target for HCCI is to improve fuel efficiency by 25 percent, decrease emissions to SULEV, and make HCCI a commercially viable system. Is Bosch close to meeting these goals?

Since HCCI demands very precise controls of injection. Which engines will this system work on?

If you include HCCI in those engines, what would the outcome be? If you use HCCI with certain gasoline engines will they surpass diesel engines in fuel efficiency?

How close are we to seeing HCCI engines in demo versions?

Lou Ann Hammond

Lou Ann Hammond is the CEO of Carlist and Driving the Nation. She is the co-host of Real Wheels Washington Post carchat every Friday morning and is the Automotive, energy correspondent for The John Batchelor Show and a Contributor to Automotive Electronics magazine headquartered in Korea. Hammond is a founding member of the Women's World Car of the Year #WWCOTY, and board member of the Women in Automotive.