| 摘要 |
The invention provides a method of controlling an electromagnetic valve of a fuel injection system for an internal combustion engine, comprising closed loop controlled current regulation, wherein the herein said current regulation comprising the following steps: using a current setpoint (I*, fig.4) to calculate 22 a voltage feed forward contribution (VFF), calculating 21 a current error (I*-I, fig.4) between said current setpoint value (I*) and a current measured value and using said current error (I*-I) to calculate 23 a voltage proportional contribution (VKP) and 24 a voltage integral contribution (VKP) using said voltage integral contribution (VK1) to calculate 25 an adjustment coefficient (αadj), determining 26 an electromagnetic valve voltage (Vmv*) from the following equation: Vmv* = αadj x (VFF+VKP+VKI). The invention provides improved pressure regulation by improving the current regulation, particularly where an inaccuracy is caused by a reverse voltage drop of a recovery diode associated with a solenoid coil acting as an actuator of an electromagnetic fuel metering valve. |
