AFTER-TREATMENT REGENERATION CONTROL METHOD AND DEVICE FOR CONSTRUCTION MACHINERY

摘要

Disclosed is an after-treatment regeneration control method for a construction machinery. When the construction machinery is in a low load or idle state and the exhaust temperature of an engine(1) is lower than an automatic regeneration temperature, an engine controller sends a signal to a main controller. The overflow pressure of an electromagnetic proportional overflow valve (6) is increased by the main controller to increase the load on the PTO port (4) of the engine (1), and the exhaust temperature of the engine (1) is raised to realize regeneration. Also disclosed is an after-treatment regeneration control device for the construction machinery, including a load pump (5) and the electromagnetic proportional overflow valve (6) connected with the output port of the load pump (5). The input port of the load pump (5) is connected with the PTO port (4) of the engine (1) and the control end of the electromagnetic proportional overflow valve (6) is connected to the main controller. The oil returning ports of the the load pump (5) and the electromagnetic proportional overflow valve (6) are respectively connected to an oil tank. The loading is independent from the hydraulic system, so the regeneration can be realized without stopping the construction machinery from working, and thus a work efficiency is improved.