System and method for calibrating external characteristic of electronic control diesel engine for loader

Abstract

The invention discloses a system and method for calibrating the external characteristic of an electronic control diesel engine for a loader. The system comprises the engine, a hydraulic torque converter, a gearbox and a drive axle which are sequentially connected through a transmission shaft. The hydraulic torque converter is connected with a steering pump and a work pump of the loader through a gear transmission system. Collected rotating speed and torque signals are transmitted to a data collection system through a sensor set. Collected parameters are transmitted to a data processing system to be analyzed through the data collection system. An analysis result is transmitted to a calibration computer. A calibration result is written in an ECU of an engine electronic control system through the calibration computer. When a test is carried out, the calibration computer controls the rotating speed of the engine through the ECU, and test automation is achieved. From the actual work condition of the loader, the actually consumed torque of a hydraulic pump in the shoveling and loading process of different materials is tested, an external characteristic curve of the engine is calibrated by adjusting the parameters of the engine, and the diesel engine for the loader is made to work in a low-oil-consumption area under different work conditions.

Description

technical field [0001] The invention relates to the field of engine design, in particular to a system and method for calibrating the external characteristics of an electronically controlled diesel engine for a loader. Background technique [0002] The external characteristics of a diesel engine refer to the change law of the performance index and characteristic parameters of the engine with the speed when the throttle is kept at the maximum position and each working condition is in the best adjustment state. The external characteristic curve of the diesel engine stipulates the maximum output power and torque of the diesel engine at each speed. If the diesel engine runs outside the external characteristic curve, it may cause the engine to overload, generate black smoke and even damage the engine. The calibration work of the diesel engine is carried out on the engine test bench, and the electric dynamometer is used to load the load, and the calibration experiment is carried ou...

AI Technical Summary

Problems solved by technology

However, the actual operating conditions of the loader are complex, the load of the hydraulic pump changes frequently, and the actual situation of the engine torque consumed by the hydraulic system of the working device is quite different from the above three commonly used matching methods. The engine cannot run at or under different operating conditions. Try to be as close to the low fuel consumption area as possible, but it cannot guarantee better power and economy under all working conditions

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