video Mazda What is a Spark-Controlled Compression Ignition? Advert 2019 • Jamie Turner is Professor of Engines and Energy Systems at the University of Bath.
Here, Professor Turner explains what a Spark Controlled Compression Ignition is, and how it helps Mazda Skyactiv-X– our newly-developed 2.0-litre, 180PS electrified petrol engine – to achieve real-world emissions of more than 50mpg.
00:03 I'm Jamie Turner I'm professor of 00:06 engines and energy systems at the 00:08 University of Bath in the institute of 00:09 advanced automotive propulsion systems 00:12 the SPC CI system is a form of 00:15 compression ignition as opposed to spark 00:17 ignition or diesel it's very much 00:19 between the two in research we've been 00:22 doing this for a long time the challenge 00:24 has always been to control the 00:26 combustion system to make it do what we 00:28 want and to enlarge the area of 00:29 operation the way that Mazda is most of 00:33 the charge is prepared early and then 00:36 very late on during compression as a 00:38 small spark ignition event which 00:39 essentially sets the rest of the charge 00:41 off that allows the combustion to be 00:43 very late which can be very inefficient 00:45 we've known about this where you've had 00:48 all sorts of tools to look at it in the 00:50 lab for many many years and never really 00:52 been able to enlarge the area and make 00:55 the switch in between spark ignition and 00:57 compression ignition seamless geometric 01:01 compression ratio of the engine is about 01:03 16 to 1 which isn't really high enough 01:05 to just combust the fuel of our 01:07 compression alone so what the system 01:10 used here does is to start to compress 01:12 the fuel and then late during the 01:14 compression stroke to inject some extra 01:17 fuel and ignite that so that when that 01:18 burns it compresses the rest of the 01:21 mixture which then goes off in an auto 01:23 which - Mazda advertsiment spot 2019
Notes for Mazda What is a Spark-Controlled Compression Ignition?
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