FUEL GAS SUPPLY METHOD AND APPARATUS FOR GAS ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a fuel gas supply method and an apparatus thereof in which blow-by of fuel gas during overlap period of an intake and exhaust valve is prevented. SOLUTION: A projecting part disposed to a stem of an intake valve and a fuel gas injection hole disposed to a sleeve constitute a slide port valve. In the opening/closing of the port valve, the timing of opening the port valve is set so that the fuel gas injected from the port valve does not blow through a cylinder during a valve overlap period of the intake and exhaust valve.