Internal-combustion engines – Charge forming device – Crankcase vapor used with combustible mixture
Patent
1991-07-11
1992-02-25
Cross, E. Rollins
Internal-combustion engines
Charge forming device
Crankcase vapor used with combustible mixture
137907, 1375992, F16K 717, F01M 1300, F01M 1302
Patent
active
050903934
ABSTRACT:
A pressure regulating valve, especially for regulating the vacuum in the crankcase of an internal combustion engine, which includes a pan-shaped housing having a bottom part, a housing cover, and a diaphragm 14 arranged between the housing and housing cover. A hollow cylindrical part 26 is arranged adjacent the diaphragm and encloses an intermediate valve member which is held in its rest position by a compression spring 24. The diaphragm is moved by a further compression spring 25 into an upper, rest position. If a vacuum in the intake manifold exceeds a certain limit value, the first valve opening between the valve seat 17 and the valve plate 18 closes against the force of the spring 24, so that blow-by gases aspirated from the crankcase are carried through the valve opening 20. If the intake manifold vacuum increases further, the diaphragm 14 moves toward the valve opening 20 and, at a maximum permissible vacuum, closes this valve opening as well. This two-stage valve is constructed in an especially compact and space-saving manner, and can be set to specific pressure limits by appropriately sizing the compression springs or the cross-sectional ratios of the valve parts.
REFERENCES:
patent: 4327773 (1982-05-01), Detweiler
patent: 4373499 (1983-02-01), Bendig
patent: 4580543 (1986-04-01), Aoki
patent: 4686952 (1987-08-01), Zeigler et al.
patent: 4919168 (1990-04-01), Wagner
Cross E. Rollins
Filterwerk Mann & Hummel GmbH
Macy M.
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