| 摘要 |
PURPOSE:To permit to discriminate between th vacuum of idling or the like and the vacuum of deceleration and cut the fuel upon deceleration by a method wherein a deceleration sensor and a computer are connected. CONSTITUTION:The coil 31 of a vacuum switching valve 30 is connected to the computer 32 while a sensing port 34, opened immediately below the throttle valve 11 of a carburettor 3, and a vacuum port 36 are connected. Upon deceleration, the computer 32 operates and detects it to excite the vacuum switching valve 30 by conducting the coil 31, the vacuum port 36 is opened and an air port 39 is closed. The vacuum of the sensing port passes through paths 35, 40, enters into a vacuum chamber 20, opens a bleed port 24 and affects the atmosphere from the air port 22 to a slow lock diaphragm chamber 15 through the path 23. As a result, the diaphragm is inflated, a slow-lock valve 17 shuts off a primary chamber 7, a low-speed fuel path 8 as well as a fuel path 18 are shut off and, thus, the fuel cut is effected. |
