Patent ID: 9695720
Date: 2017-07-04
CPC Classifications: F01N,Y02T

Claim:
1. A method of regenerating an exhaust gas post-processing apparatus in an engine-driven generator, the engine-driven generator comprising an engine that is a diesel engine, a generator body driven by the engine, and an output terminal block connected to the generator body via a main supply circuit, and configured to be able to supply electricity generated by the generator body to an electrical device connected to the output terminal block, the method comprising: providing a continuous regeneration type exhaust gas post-processing apparatus that is installed in an exhaust gas path of the engine and comprises an oxidation catalyst and a diesel particulate filter; and performing forced regeneration of the exhaust gas post-processing apparatus by restricting intake gas to the engine to increase a temperature of exhaust gas from the engine when the deposition amount of particulate matter with respect to the diesel particulate filter becomes a predetermined deposition amount; determining electricity to be generated by the generator body, in which an oxidation catalyst inlet temperature becomes a burning temperature of the particulate matter deposited with respect to the oxidation catalyst or more during running of the engine with the intake gas restricted as minimum generated electricity in advance, and setting electricity consumed by an electric heater actuated with the electricity generated by the generator body to the minimum generated electricity or more; and monitoring the running state of the engine while the forced regeneration is being performed, and switching ON the electric heater, when the engine is in a predetermined light load running state and switching OFF the electric heater when the engine is under a predetermined necessary load or more.