2019 MAZDA 3 HCCI TECH -HCCI engines rely on sparkless ignition via compression, but they run strictly on gasoline. Their efficiency comes from burning a homogenous mix of and air and fuel at lower temperatures, which ends up reducing much of the heat energy lost in a normal gasoline engine and can see fuel consumption reduced by as much as 30 percent. The process also produces much fewer emissions. The main problem is the specific temperature needed for smooth operation. Too cold and it affects the performance of the ignition system. Too hot and you end up with engine knock. HCCI engines also tend to wear out faster. To get around the temperature problem, Mazda’s HCCI engine is expected to be capable of conventional sparkplug ignition when necessary, such as during cold starts.HCCI engines rely on sparkless ignition via compression, but they run strictly on gasoline. Their efficiency comes from burning a homogenous mix of and air and fuel at lower temperatures, which ends up reducing much of the heat energy lost in a normal gasoline engine and can see fuel consumption reduced by as much as 30 percent. The process also produces much fewer emissions. The main problem is the specific temperature needed for smooth operation. Too cold and it affects the performance of the ignition system. Too hot and you end up with engine knock. HCCI engines also tend to wear out faster. To get around the temperature problem, Mazda’s HCCI engine is expected to be capable of conventional sparkplug ignition when necessary, such as during cold starts.
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