| 摘要 |
PURPOSE:To unnecessitate a separate choking valve by arranging a choke system fuel throttle valve device operating by the temperature of water cooling the engine in the intermediate of a choke system fuel passage opening in the gaseous mixture passage of the throttle valve. CONSTITUTION:A choke system fuel outlet depression 4 across both upstream and downstream sides is provided on the inner surface of a gaseous mixture passage 3 opposite to a position, upon closing of the peripheral edge 2, of the valve body of a throttle valve 1. In the intermediate of the choke system passage 7, a throttle valve body 10 driven by a temperature responding device 9 is provided. By this configuration, the temperature responding device 9 operates in response to the temperature increase of an engine cooling water 8, and the quantity of fuel flowing through the choke system fuel passage 7 is adjusted by the choke fuel throttle valve body 10, and further the passage 7 is interrupted when the warming-up is completed. |
