Running state adjusting device of diesel engine

Abstract

The invention discloses a running state adjusting device of a diesel engine. The running state adjusting device comprises a whole vehicle controller and an engine controller, the whole vehicle controller is in communication connection with the engine controller, the whole vehicle controller is configured to obtain the oxygen content of an area where the diesel engine is located, obtain the altitude value of the area where the diesel engine is located, determine the theoretical oxygen content according to the altitude value and determine the oxygen variation according to the oxygen content andthe theoretical oxygen content, and the engine controller is configured to receive the oxygen variation and adjust the fuel injection quantity of the diesel engine according to the oxygen variation. The adjusting device is configured, when an excavator operates in an environment with non-uniform oxygen content distribution (such as a tunnel), if the oxygen content is changed, the excavator can adjust the fuel injection quantity of the engine according to the current oxygen content, so that the problem that the working environment of the tunnel is influenced due to the fact that the excavator exhausts a large amount of black smoke due to insufficient fuel oil combustion can be avoided.

Description

technical field [0001] The embodiment of the present invention relates to construction machinery technology, and in particular to a device for adjusting the running state of a diesel engine. Background technique [0002] Tunnel working condition is a common working condition. When the tunnel is well ventilated, the air pressure in the tunnel does not change much relative to the opening, but the farther away from the opening, the lower the oxygen content in the air (the air contains The amount of oxygen will be reduced by more than 5% relative to the entrance of the tunnel. According to some high-altitude long tunnel construction parties, it will actually be as low as about 10%). [0003] At present, the diesel engine can only adjust the combustion characteristic parameters such as fuel injection volume and fuel injection timing according to different atmospheric pressures, and adjust the control of the hydraulic pump, such as adjusting the displacement and the rate of change...

AI Technical Summary

Problems solved by technology

[0003] At present, the diesel engine can only adjust the combustion characteristic parameters such as fuel injection volume and fuel injection timing according to different atmospheric pressures, and adjust the control of the hydraulic pump, such as adjusting the displacement and the rate of change of the displacement. Changes in oxygen content make the above adjustments

Because the diesel engine cannot adjust the combustion characteristic parameters such as fuel injection quantity and fuel injection timing according to the change of oxygen content, when the oxygen content of the working area where the diesel engine is located changes, if the load of the diesel engine remains unchanged, it is easy to It has a great impact on the working state of the diesel engine, for example, the fuel of the diesel engine cannot be completely burned, causing a large amount of black smoke from the diesel engine, which poses a great hazard to the working environment of the tunnel and the health and safety of the staff.

In addition, due to the incomplete combustion of fuel, the output power of the engine is low

If the load power generated by the hydraulic pump remains unchanged, it is easy to cause the engine to stall

[0004] In order to solve the above problems, the current commonly used solution is for the vehicle controller manufacturer or diesel engine manufacturer to separately formulate a dedicated vehicle controller or diesel engine controller program for a specific tunnel environment, but when the use conditions change, such as changing the construction site , or when the depth of the tunnel working face changes, it is necessary to update the whole machine or the diesel engine controller program, which increases unnecessary research and development costs

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