| 摘要 |
<p>A valve assembly (10) for introducing exhaust gas into the intake manifold of an internal combustion engine, preferably, an electric exhaust gas recirculation valve assembly. The valve assembly (10) includes an actuator (16) having a centered solenoid assembly (18) that reciprocates a floating valve mechanism (14) to provide a substantially constant flow rate of exhaust gas regardless of the reciprocating direction of the floating valve mechanism (14). That is, the valve assembly (14) delivers a gas flow rate that is substantially free of hysteresis because the valve assembly provides substantially the same exhaust gas flow rate for a given percentage of a pulse width modulated duty cycle when the floating valve mechanism (14) is reciprocating in a valve opening direction or a valve closing direction.</p> |
