| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas fuel supply device provided with a vacuum type lock mechanism and capable of shortening time until shutting-off of fuel after turning off a key to avoid occurrence of run-on. SOLUTION: An air passage for connecting a negative pressure introducing chamber 20 with an intake pipe passage 27 is formed as two systems including an air passage 22A connected from the downstream side of a throttle valve 23A and an air passage 22B connected from the upstream side of the throttle valve 23A. A switching device 30 for switching them is provided to switch from a condition in which the air passage 22A connected from the downstream side of the throttle valve 23A when turning on the key is communicated into a condition in which the air passage 22B connected from the upstream side of the throttle valve 23A when turning off the key is communicated by the switching means 30. COPYRIGHT: (C)2006,JPO&NCIPI |
