| 摘要 |
A compression-ignition“split-cycle”engine (100) comprises: a cylinder block (200) with an expansion cylinder (6) having an expansion piston (7) that is adapted to move alternatively between a top dead center (ETDC) and a bottom dead center (EBDC) by a crankshaft mechanism (20) that causes a predetermined position of the expansion piston (7) to correspond to a predetermined crankshaft angle; a compression cylinder (2) having a compression piston (1) that is adapted to move alternatively between a CTDC and a CBDC according to a predetermined angular phase shift in delay to the expansion piston (7); a cylinder head (30) that closes the cylinders and comprises a crossover passageway (5) with an opening (5a) in constant communication towards compression cylinder (2) and an opening (5b) having a transfer valve (4) towards expansion cylinder (6), an intake valve (3) and a exhaust valve (9); a means for opening/closing the transfer valve (4); a means for opening/closing exhaust valve (9) at predetermined moments of the alternative cycle of the pistons, and a fuel injector (8) in the crossover passageway (5). The opening movement of the transfer valve (4) is carried out in advance 20° or more of crankshaft angle with respect to the crankshaft angle of the ETDC, such that from the opening instant up to reaching the ETDC there is a substantial equalization of pressure between the cylinders, such that between the ETDC and the CTDC a transfer occurs of the comburent fluid between the two cylinders, and such that injector (8) injects the fuel (8a) starting from the achievement of the ETDC.
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