Calibration method and device of driving and driven electric control units (ECU) of engine

Abstract

The invention discloses a calibration method and device of driving and driven electric control units (ECU) of an engine. The method comprises the following steps that pins of to-be-calibrated ECUs areselected firstly, voltage of the pins is detected, whether the voltage is within a preset effective range is judged, if yes, 1 is added to effective counting values corresponding to the pins and 1 isadded to a total mounting value corresponding to the pins, if no, the effective counting values corresponding to the pins is maintained and 1 is added to the total mounting value corresponding to thepins; when all the pins are subjected to the process, all the effective mounting values corresponding to all the pins are added as a final effective mounting value, total counting values corresponding to all the pins are added as a final total counting value; and finally, the ECUs of the engine are calibrated based on the final effective counting value and the final total counting value. The ECUsare calibrated with voltage of the pins of the ECUs, and whether the engine is started is judged, so that engine damage caused by wrong connection of plugs of the ECUs is prevented.

Description

technical field [0001] The present application relates to the technical field of engines, in particular to a method and device for calibrating an engine master-slave ECU. Background technique [0002] As the main unit of power output, the fuel engine is one of the most important parts of a motor vehicle. For a large-bore engine, because it contains more cylinders and more sensors, a single engine electronic control unit (Electronic Control Unit, referred to as ECU) The number of fuel injector drives, sensor pins, etc. can no longer meet the needs of large-bore engines, so two ECUs are needed for joint control. [0003] When using two ECUs for joint control, first do calculations on one ECU, and then transmit control parameters such as fuel injection quantity and fuel injection advance angle to the other ECU through the CAN bus, and send fuel injection quantity, fuel injection advance angle, etc. This ECU is called the main ECU. Correspondingly, another ECU receives the cont...

AI Technical Summary

Problems solved by technology

However, this method of identifying the master-slave ECU only based on the external signal wires does not verify the signal wires on the plugs of the master-slave ECUs, that is, it cannot ensure that the signal wires of the master ECU are connected to the plugs of the master ECU. Connected from the ECU connector is the signal line from the ECU

If one of the main and slave ECUs is reversed, the engine may not start normally, or even if it can be started, it may cause damage to the engine

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