发明名称 |
APPARATUS FOR DRIVING A PIEZOELECTRIC ACTUATOR |
摘要 |
An apparatus is provided for controllably connecting and disconnecting a piezoelectric actuator to and from an energy source to effect the displacement of a piezoelectric actuator for a fuel injector. Precise control of the timing and duration of the piezoelectric actuator is necessary to ensure that a proper quantity of fuel is delivered to each cylinder of an internal combustion engine. A charging and discharging means monitors the voltage level of the piezoelectric actuator, and the charging and discharging current of the piezoelectric actuator. Further, a smoothing means aids in leveling the charging and discharging current to better approximate a constant current to control the piezoelectric actuator providing a precise quantity of fuel to be delivered.
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申请公布号 |
US5130598(A) |
申请公布日期 |
1992.07.14 |
申请号 |
US19900629063 |
申请日期 |
1990.12.14 |
申请人 |
CATERPILLAR INC. |
发明人 |
VERHEYEN, MICHAEL R.;ANTONE, JAMES A.;GRAJALES, LILIANA |
分类号 |
F02M51/06;F02D41/20;H01L41/04;H01L41/09;H02N2/06 |
主分类号 |
F02M51/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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