What is a 5 stroke engine?
Why aren't they using them in vehicles right now?
Is this a new thing or has it been around for a while?
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Sign up to join this communityWhat is a 5 stroke engine?
Why aren't they using them in vehicles right now?
Is this a new thing or has it been around for a while?
What is a 5 stroke engine?
They tend to consist of only three cylinders rather than the more traditional 4 stroke, 4 cylinder engines that many people are using today. There are two small small high-pressure cylinders and one larger low-pressure cylinder. This video has some good information and animations.
Why aren't they using them in vehicles right now?
Is this a new thing or has it been around for a while?
From wikipedia, according to Suzuki, Ph.D., Takashi (1997). The Romance of Engines. SAE. pp. 87–94., the engine was first introduced during the early 1900's by the Eisenhuth Horseless Vehicle Company, there was and I quote:
an unusual model called the Compound with three cylinders. Two were working cylinders, the larger middle one further expanded the exhaust gases of the outer working cylinders, this concept received later the name: '5-Stroke engine'.
http://www.ilmor.co.uk/capabilities/5-stroke-engine
https://en.wikipedia.org/wiki/Eisenhuth_Horseless_Vehicle_Company