Pressure regulating valve

Details Pressure regulating valve Pressure regulating valve

2007-02-13

2007-02-13

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

C251S331000

Reexamination Certificate

active

11103810

ABSTRACT:
Known pressure regulating valves have a valve closing body, which cooperates with a valve seat, and a restoring spring, which acts on a valve closing body in the direction facing away from the valve seat. It is disadvantageous that the restoring spring is disposed in a pressure chamber, which has the valve seat and through which aggressive blowby gases flow out of the crankcase. The blowby gases for instance have a corrosive, etching effect on the material of the restoring spring, shortening the service life and lessening the spring force of the restoring spring. This has a highly adverse effect on the regulation of the pressure in the crankcase. In the pressure regulating valve of the invention, the service life of the restoring spring is increased. According to the invention, the restoring spring (31) is embodied as a tension spring and is located on the side of the valve closing body (15) facing away from the valve seat (12).

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