HUndbreeders know: If you cross two breeds, the result can combine the positive characteristics of the parents. With a bit of bad luck, it can also be the wrong ones, for example the creation called Puggle has the physique of the pug, but the urge to move of a beagle. The hybrids in technology are no different, you can always look forward to what comes out of the mating. For example, when a combustion engine and an electric motor are combined. Or when trying to combine the advantages of the diesel and gasoline engine, i.e. above all economy and revving.
Some have given up, but Mazda is offering the compression igniter, known as Diesotto after an unsuccessful attempt by Mercedes-Benz, in some models, including the compact SUV CX-30 Skyactiv. It works like this: The four-cylinder with a displacement of two liters works with an extremely high compression for a gasoline engine and a very lean gasoline-air mixture. At lower speeds, the heat generated during compression ignites it. But because compression ignition is too sluggish for high engine speeds, it switches to operation with spark plugs. This requires some design effort, for example the engine has variable timing, a small Roots compressor and, even at low speeds, a spark that initiates compression ignition via a small amount of a richer mixture. Mazda Spark calls the system Controlled Compression Ignition (SPCCI), a spark-controlled compression ignition. The mode in which the motor is currently working can be called up on the display. At the beginning of 2020 we were very impressed with this engine, but criticized the restrained power delivery and consumption values that were a bit above expectations.
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