The present invention provides a method for controlling a closing
operation of an exhaust valve (11) in an internal combustion engine. A
current position X.sub.0 of the exhaust valve (11) and a rotation speed
Ne of the internal combustion engine are determined, and on the basis of
the current position X.sub.0 and rotation speed Ne, a time T.sub.0 at
which a piston arrives at the current position X.sub.0 of the exhaust
valve (11) is calculated. The closing operation of the exhaust valve (11)
is then started before this arrival time T.sub.0. Next, a time T.sub.1 at
which the gap between the exhaust valve (11) and piston reaches a first
predetermined value hc1 is calculated, and when this time T.sub.1
arrives, the closing operation of the exhaust valve (11) is stopped
temporarily. A time T.sub.2 at which the piston arrives at the stopping
position X.sub.1 of the exhaust valve (11) is then calculated, and the
closing operation of the exhaust valve (11) is resumed before this
arrival time T.sub.2.