| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a control method for a sub-chamber type gas engine, wherein air only is supercharged by a supercharger because lean mixture as supply air is formed by supplying fuel to the downstream side of a throttle in a supply air passage and a waste gate is arranged for reducing boost pressure on the exhaust side, the burden of the supercharger and the pressure loss of the throttle because air only passes therethrough. <P>SOLUTION: The sub-chamber type gas engine has a closable bypass line 10 laid between fuel gas passages on the upstream sides of a main chamber fuel gas injection device 11 and a sub-chamber fuel gas injection device 12. In a method of depressurizing supply air during load cut-off, the valve of the main chamber fuel gas injection device is closed, the bypass line 10 is opened so that fuel gas to be supplied into the main chamber fuel gas injection device flows into the sub-chamber fuel gas injection device, the waste gate 7 is fully opened, and the throttle 5 is closed a litter later. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
