STEAM TEMPERATURE CONTROL DEVICE FOR EVAPORATOR

摘要

A control device (11) feed-forward-controls a feed water amount according to an engine rotating speed and a suction negative pressure and feed-back-controls a feed water amount according to the deviation between an actual steam temperature and a target steam temperature, for the purpose of controlling an actual steam temperature of steam, generated by an evaporator (3) where water is heated by exhaust gas from an engine (1), to a target steam temperature by varying a feed water amount from a feed water amount controlling injector (7). An actual steam temperature of steam generated by the evaporator (3) can be controlled to a target steam temperature highly accurately even in a transition condition by using at least one of parameters showing engine's (1) combustion conditions such as a fuel-cut control signal, ignition retard control signal, EGR control signal and air/fuel ratio control signal to correct a feed forward control value.