| 摘要 |
PROBLEM TO BE SOLVED: To provide a negative pressure tank of a high degree of part integration and superior in space efficiency. SOLUTION: The negative pressure tank is formed by vibration-welding a synthetic resin made body 1 and cover 2 at joint surfaces 5 and two solenoid valves 3, 4 are attached on an outer surface. A negative pressure chamber 6 is formed with a bulge part 6A of the body 1 side and a bulge part 6B of the cover 2 side and an internal negative pressure passage 21 is formed inside of a flat deck part 7. In the solenoid valves 3, 4, one end of pipe for introducing negative pressure is directly connected to a side wall of the negative pressure chamber 6 through a rubber grommet. One end of the internal negative pressure passage 21 is connected to the solenoid valve 4 through a rubber hose 26 and another end of the internal negative pressure passage 21 is connected to a negative pressure actuator through an actuator connection pipe 22. Although plural harnesses pass over an upper surface of the deck part 7, crossing thereof with rubber hose can be avoided by providing the internal negative pressure passage 21.
|
