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Title:
PUMP DEVICE PARTICULARLY FOR TANK SYSTEM FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JPH08100768
Kind Code:
A
Abstract:

PURPOSE: To mass-produce pump devices with reliable quality functions in cost-effective fashion by connecting a solenoid valve integral with them to the outside air directly via a venthole and dispensing with hoses for selector valves.

CONSTITUTION: This pump device has an upper-half casing portion 52 and a lower-half casing portion 53, between which a movable wall in the shape of a pump diaphragm 30 is interposed with a peripheral fit to separate a pump chamber 56 from a delivery chamber on the opposite side. The delivery chamber is limited at the other end by two check valves 28 among others. A pump spring 65 is pressed on a spring retainer 64 and a bottom 66 of the upper-half casing portion 52. In a salient projecting from the bottom 66 into the pump chamber 56, a solenoid valve is placed on the side opposite to the pump chamber 56 and is closed off by a cover 70 from outside. The valve casing of the solenoid valve has a through hole 73 in its core 72 ending in a flow passage 74 connected to the outside air via a venthole 42 coupled direct to the outside air.


Inventors:
BUORUFUGANGU SHIYURUTSU
Application Number:
JP14659495A
Publication Date:
April 16, 1996
Filing Date:
June 13, 1995
Export Citation:
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Assignee:
BOSCH GMBH ROBERT
International Classes:
F04B43/06; B60K15/035; F02M25/08; F04B45/033; (IPC1-7): F04B43/06
Attorney, Agent or Firm:
Toshio Yano (2 outside)