| 摘要 |
<p>A two or four stroke valve engine comprises at least one cylinder (3) within which a piston (4) moves and which receives an air-fuel mixture via at least one induction or intake duct (16), there being provided for the combustion products at least one exhaust duct (17) operationally connected to said cylinder, said intake duct (16) and said exhaust duct (17) each being provided with at least one respective valve member (18, 19) subjected to operator means (25, 26) to open it during the use of the engine, and closure means (28) returning said valve member (18, 19) into the position in which it closes the respective duct (16, 17). The valve members (18, 19) are positioned to the side of the cylinder (3) and intercept apertures (16A, 17A) of the respective ducts (16, 17), which open into at least one mixing chamber (13) positioned to the side of the cylinder (3) and communicating with it, at least in correspondence with said chamber (13) there being provided ignition means (8) for the mixture present in it.</p> |
