Exhaust gas recirculation valve having a centered solenoid assembly and floating valve mechanism
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United States of America Patent
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Oct 5, 1999
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N/A
app pub date -
Oct 3, 1997
filing date -
Nov 21, 1996
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Abstract
A valve assembly for introducing exhaust gas into the intake manifold of an internal combustion engine, preferably, an electric exhaust gas recirculation valve assembly. The valve assembly includes an actuator having a centered solenoid assembly that reciprocates a floating valve mechanism to provide a substantially constant flow rate of exhaust gas regardless of the reciprocating direction of the floating valve mechanism. That is, the valve assembly delivers a gas flow rate that is substantially free of hysteresis because the valve assembly provide substantially the same exhaust gas flow rate for a given percentage of a pulse width modulated duty cycle when the floating valve mechanism is reciprocating in a valve opening direction or a valve closing direction.
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