DEVICE AND METHOD FOR CONTROLLING HIGH-PRESSURE COMMON-RAIL SYSTEM OF DIESEL ENGINE

摘要

A device (200) for controlling the high-pressure common-rail system of a diesel engine comprises an operation condition parameter acquiring device(201), which is used for acquiring operation condition parameters associated with the high-pressure common-rail system; a control quantity determining device (202) coupled with the operation condition parameter acquiring device (201), which is used for determining a control quantity of the high-pressure common-rail system according to the operation condition parameters, a target value of the fuel pressure in the high-pressure common-rail tube cavity, and a control model based on a physical model of the system, wherein the control quantity is the equivalent cross-section area of the electromagnetic valve of a flow rate metering unit; a driving signal determining device (203) coupled with the control quantity determining device (202), which is used for determining a driving signal for driving the flow rate metering unit based on the determined control quantity. The device can achieve precise injection pressure and fast response. A method for controlling the high-pressure common-rail system of a diesel engine is also disclosed.