| 摘要 |
<p>The invention relates to a method of reducing emissions in the exhaust gases of an internal combustion engine (1) which comprises at least one cylinder (2) to which an air/fuel mixture is supplied when a crankshaft (3) of the internal combustion engine (1) is to be made to rotate, at least one intake valve (4), at least one exhaust valve (6), control members (8) for controlling the opening and closing of the intake and exhaust valves (4, 6), and a piston (10) reciprocating between a top dead-centre position and a bottom dead-centre position in the cylinder (2). The method comprises the following steps: an air/fuel mixture with a lambda value greater than 1 is supplied to the cylinder (2), the intake valve (4) is controlled so that it opens after the piston (10) has passed the top dead-centre position, the exhaust valve (6) is controlled so that it opens before the piston (10) has passed the bottom dead-centre position and the exhaust valve (6) is controlled so that it closes before the intake valve (4) opens.</p> |
