Proportional Heater Control For Diesel Emissions System for Diesel - Generator Set

摘要

A proportional heater controls a diesel powered electrical generator with a diesel particulate filter (DPF). A proportional control is applied to the heater based upon exhaust temperature. The heater heats exhaust gas to a regeneration temperature to remove soot and sulphur from the processed gas when the diesel fuel has a sulphur content exceeding 1,000 ppm. The heater is supplied power via SCRs to reduce electromagnetic and radio frequency interference. A manual override permits the operator to set a temperature setpoint, force the heater to meet a certain temperature and establish a load bank for diesel engine electrical generator set.

主权项

1. A proportional heater control for a diesel generator set emissions system wherein a diesel engine is motively coupled to an electrical generator, said diesel engine having an exhaust system for its exhaust gas and a diesel particulate filter in said exhaust system, the proportional heater control for the diesel generator set emissions system comprising:
a heater disposed upstream of said filter in said exhaust system and controlled by a heater control signal; an exhaust gas temperature sensor upstream of said filter in said exhaust system; a controller, coupled to said temperature sensor and said heater, generating a proportional heater control signal based upon the sensed temperature from said sensor; whereby the controlled heater maintains exhaust gas temperature not less than a predetermined regeneration exhaust gas temperature during operation of said diesel engine electrical generator set; wherein said heater is supplied power by said generator and the controller applies proportional power to said heater via one or more silicon controlled rectifiers (SCR) based upon said exhaust gas temperature.