Internal-combustion engines – Charge forming device – With fuel pump
Patent
1994-04-05
1995-05-02
Yuen, Henry C.
Internal-combustion engines
Charge forming device
With fuel pump
123381, 1374675, F02M 3704, F16K 1500
Patent
active
054110033
ABSTRACT:
A viscosity sensitive, pressure divider arrangement for use as part of an engine timing control tappet system where that system includes a block oil pressure supply, hydromechanical control valve and an oil sump, the pressure divider arrangement including an inlet chamber, a divider chamber and an exit chamber. The inlet chamber is connected to the divider chamber by means of a first connecting conduit having a relatively short length. The outlet side of the divider chamber is connected with the exit chamber by means of a second connecting conduit which has a length substantially longer than the length of the first connecting conduit. Additionally, the divider chamber includes a pressure-assist outlet aperture which is in flow communication with the hydromechanical control valve. The viscosity of oil flowing into the pressure divider arrangement will be acted upon by the combination of connecting conduits wherein the first connecting conduit is less viscosity sensitive than is the second connecting conduit. Consequently, a controlling pressure will be created within the divider chamber and this controlling (assist) pressure is communicated to the hydromechanical control valve and influences the switch point of that control valve.
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Eberhard Walter W.
Free Paul D.
Long Jerome M.
McCosby John J.
Olson David A.
Cummins Engine Company, Inc.
Moulis Thomas N.
Yuen Henry C.
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