In the field of outboard engines, both technologies are commercialized. It is therefore proven technologies that have integrated the same technological advances Whether 2 or 4 stroke, the concept is therefore very old at least in its principles. Otto manufactures the first internal combustion engine based on the principle of Alphonse Beau de Rochas. A few years later, in 1876, the German N.A. The 4-stroke cycle dates back to January 1862, patent registered by Alphonse Beau de Rochas, engineer of the railways of Provence. It is in 1860, more than 150 years ago that the French Hugon and Lenoir introduced the 2-stroke engine, improved in 1879 by Dugald Clerk. To speak of a 2-stroke or 4-stroke engine is first of all to speak of a reciprocating piston internal combustion engine.
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