US 7,320,216 B2 | ||
Hydraulic system having pressure compensated bypass | ||
Michael T. VerKuilen, Metamora, Ill. (US); and Aleksandar M. Egelja, Naperville, Ill. (US) | ||
Assigned to Caterpillar Inc., Peoria, Ill. (US); and Shin Caterpillar Mitsubishi Ltd, (Japan) | ||
Filed on Oct. 31, 2005, as Appl. No. 11/261,539. | ||
Prior Publication US 2007/0095059 A1, May 03, 2007 | ||
Int. Cl. F16D 31/02 (2006.01) |
U.S. Cl. 60—421 [91/361] | 21 Claims |
1. A hydraulic system comprising:
a first source of pressurized fluid;
at least one fluid actuator; and
a first valve disposed between the first source and the at least one fluid actuator being configured to selectively communicate
pressurized fluid from the first source to a source of low pressure; and
a controller configured to:
determine a first amount of displacement of the first valve,
determine a second amount of displacement of the first valve, and
modify the first amount of displacement as a function of the second amount of displacement and communicate a signal indicative
of the modified first amount of displacement to the first valve to affect movement of the first valve without communicating
signals indicative of the first or second amounts of displacement to the first valve when a first pressure is less than or
equal to a pressure of pressurized fluid acting on the at least one fluid actuator.
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