Starting and stopping control system and control method for electronic fuel injection engine of excavator

Abstract

Disclosed is a starting and stopping control system for an electronic fuel injection engine of an excavator. The starting and stopping control system comprises an engine, an ECM, an ECU, a display instrument, a key switch, a revolving speed sensor, a water temperature sensor, a throttle dial, a starting relay, a stopping relay and a starting motor. The throttle dial is connected with the ECU. The key switch is connected with the ECU through a wire. The display instrument is connected with the ECU. The ECU is connected with the ECM.A control signal is sent to the ECM. The ECM is connected with the stopping relay, the water temperature sensor and the revolving speed sensor. The engine is connected with the ECM. The starting motor and the starting relay are connected. According to the starting and stopping control system, by controlling starting and stopping of the electronic fuel injection engine of the excavator, accidents such as journal sticking tile burning, piston scraping and piston seizure of the engine caused by poor lubrication and high temperature if the engine is started or stopped at a high throttle position are avoided, and the service life of the engine is prolonged advantageously; in addition, by additionally installing an emergency stopping device, so that stopping can be conducted immediately through an operator in an emergency situation, and accident risks of in the process of operating the excavator are reduced.

Description

technical field [0001] The invention belongs to the field of excavator control, and relates to the control of an electric injection engine, in particular to a start-stop control system and a control method for an excavator electric injection engine. Background technique [0002] The working environment of excavators is complex and changeable, and the working conditions are harsh. Due to the negligence and bad habits of the operator, the diesel engine runs at a high speed at a low temperature or is directly turned off at a high speed. This operation will not only cause problems such as engine pulling, carbon deposition, and even damage. At present, most of the main engine manufacturers' machines are started and stopped at idle speed by the user, and some manufacturers have designed the following control methods: when starting, no matter where the throttle is at low speed, the main problems are as follows: 1. After starting, the instrument The display speed is at the lowest s...

AI Technical Summary

Problems solved by technology

[0002] The working environment of excavators is complex and changeable, and the working conditions are harsh

Due to the negligence and bad habits of the operator, the diesel engine runs at high speed at low temperature or directly shuts off at high speed. Such operation will not only cause problems such as engine scuffing, carbon deposits, and even damage.

At present, most of the machines of main engine manufacturers are implemented by the user to start and stop at idle speed, and some manufacturers have designed the following control method: when starting, no matter where the accelerator is, they start at a low speed. The main problems are as follows: 1. After starting, the instrument The display speed is at the lowest speed, while the accelerator gear displayed on the instrument is at the high position

2. Turn the accelerator dial after starting, the engine speed will be directly pulled from low idle speed to high speed, which will make the operator extremely uncomfortable

When shutting down, run from high speed to low speed for a few seconds and then turn off. There are also two problems here: 1. Idle speed from high speed to low speed for a few seconds is not enough for lubrication and cooling. Long-term use will damage the engine

2. In case of an emergency, a serious disaster may have occurred within a few seconds, and emergency avoidance cannot be realized

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