公开(公告)号：US5692480A

公开(公告)日：1997-12-02

申请号：US698454

申请日：1996-08-16

申请人： Naoya Kato ,  Hideaki Itakura ,  Tohru Yoshinaga ,  Tokio Kohama ,  Katuo Azegami

发明人： Naoya Kato ,  Hideaki Itakura ,  Tohru Yoshinaga ,  Tokio Kohama ,  Katuo Azegami

IPC分类号： B60K15/035 ,  B60K15/04 ,  F02M25/08 ,  F02M33/02

CPC分类号： F02M25/089 ,  B60K15/03504 ,  B60K15/03519 ,  B60K15/04

摘要： An evaporative emission control system which may be used in automotive vehicles is disclosed. The evaporative emission control system includes a canister, an inlet passage, a fuel vapor passage, an outlet valve, and an inlet valve. The air inlet passage is exposed at an end to the atmosphere and connected at the other end to the canister for drawing fresh air into the canister. The fuel vapor passage communicates between the canister and a fuel tank. When a pressure in the fuel tank is increased above a given level so that a difference in internal pressure between the fuel tank and the canister reaches a first value, the outlet valve establishes communication between the fuel tank and the canister to allow fuel vapor evaporated within the fuel tank to be drawn into the canister through the fuel vapor passage. Alternatively, when the pressure in the fuel tank is decreased below a given level so that a difference in internal pressure between the fuel tank and the canister reaches a second value, the inlet valve establishes communication between the fuel tank and the canister to allow the air to be drawn into the canister through the air inlet passage. The second value is so determined as to prevent the amount of fuel vapor generated within the fuel tank from being increased above a given value.

摘要翻译： 公开了一种可用于汽车的蒸发排放控制系统。 蒸发排放控制系统包括罐，入口通道，燃料蒸气通道，出口阀和入口阀。 空气入口通道在大气的端部露出，另一端与罐连接，用于将新鲜空气吸入罐中。 燃料蒸汽通道在罐和燃料箱之间连通。 当燃料箱中的压力增加到给定水平以上，使得燃料箱和罐之间的内部压力差达到第一值时，出口阀建立燃料箱和罐之间的连通，以允许燃料蒸汽在其内蒸发 燃料箱通过燃料蒸汽通道被吸入罐中。 或者，当燃料箱中的压力降低到给定水平以下，使得燃料箱和罐之间的内部压力差达到第二值时，入口阀建立燃料箱和罐之间的连通，以允许空气 通过进气通道被吸入到罐中。 第二个值被确定为防止在燃料箱内产生的燃料蒸汽的量增加到高于给定值。