| 摘要 |
PURPOSE: A reduction control method of exhaust gas in starting an engine of a vehicle is provided to reduce exhaust gas of hydrocarbon and carbon monoxide, and to increase the fuel efficiency by sequentially pre-injecting according to position of engine stop, valve timing, cam signals and modification of the engine control method. CONSTITUTION: An engine control unit inputs cam and crank signals(S100), and detects the missing tooth after detecting the valid tooth(S110). The engine control unit outputs a fuel injection control signal for starting the engine by sequential pre-injection from the top dead center of a first cylinder after the 19th crank signal in detecting the missing tooth(S120,S130). The engine control unit detects the cam signal to be the high signal(S140), and outputs the control signal for injecting fuel to the third cylinder(S150). Inversion of the cam signal from the high signal to the low signal is detected before detecting the 24th tooth(S160). Fuel is injected to the fourth cylinder according to command of ignition(S170), and fuel is injected sequentially after detecting the missing tooth(S190).
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