Delphi engineers have found a way of using direct injection on petrol engines, and the breakthrough could revolutionise engine efficiency
Jon Morgan -
AUTOEXPRESS - June 6th, 2012
Who needs a PHEV with this sort of efficiency? --Ed.
Engineers at Delphi say that the next generation of gasoline engines will offer the same FE as PHEV's without the extra weight and cost. They have worked out how to incorporate the direct-injection method of ignition used in diesels into gasoline engines. And the potential benefit is staggering.
Harry Husted, Delphi’s chief engineer for advanced powertrain development, said: “The results of initial simulation work show this technology could improve engine efficiency by up to 50 per cent.”
Delphi’s gasoline direct-injection compression ignition system uses sophisticated valve timing, intake and exhaust tech to inject gas in precisely controlled bursts. The company has successfully developed and tested a single-cylinder engine prototype and is already working on a more advanced system.
Husted added: “A multi-cylinder engine is being developed and will be ready to test later this year. It’s going to be a very torquey engine, with a similar feel to a diesel.”
And the new engine will have an immediate advantage over a diesel – and extra appeal to manufacturers: as unleaded fuel burns more cleanly than diesel, gas engines don’t need an expensive and highly complex...
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