Patent ID: 8061316

Claim:
An internal combustion engine, comprising: a cam shaft, having an inlet cam for opening and closing an inlet valve; a variable valve train mechanism, configured to receive a cam displacement of the inlet cam so as to vary a driving output for driving the inlet valve continuously from a maximum valve lift to a minimum valve lift, while narrowing a valve opening period, so as to match the driving output with a running condition of the internal combustion engine; and a control part, configured to control the variable valve train mechanism so as to set a valve lift of the inlet valve to a starter valve lift when starting the internal combustion engine in a cold state, and to a fast idle valve lift thereafter, wherein the starter valve lift is formed so that a valve opening period of the inlet valve is set to encompass an overall area of an induction stroke period of the internal combustion engine from a top dead center to a bottom dead center of the induction stroke period, and an amount of maximum valve lift during the starter valve lift is smaller than an amount of maximum valve lift during the fast idle valve lift.