Steam temperature control system for evaporator
First Claim
1. A vapor-temperature control system for an evaporator for controlling an actual temperature (Ts) of a vapor generated by an evaporator (3) for heating a liquid-phase working medium by an exhaust gas from an engine (1) to a target vapor temperature (Tst),characterized in that said system comprises a liquid-phase working medium supply amount varying means (7) for varying the amount of liquid-phase working medium supplied to the evaporator (3), and a control means (11) for controlling the amount of liquid-phase working medium supplied by the liquid-phase working medium supply amount varying means (7), based on a parameter indicating the burned state of the engine (1).
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Accused Products
Abstract
In order to control an actual temperature of a vapor generated by en evaporator (3) for heating water by an exhaust gas from an engine (1) to a target vapor temperature by varying the amount of water supplied from a supplied-water amount control injector (7), a control unit (11) controls the amount of water supplied in a feedforward manner in accordance to an engine rotational speed and an intake negative pressure and controls the amount of water supplied in a feedback manner based on a difference between the actual vapor temperature and the target vapor temperature. It is possible to control the actual temperature of the vapor generated by the evaporator (3) to the target vapor temperature with a high accuracy even in a transient state of the engine (1) by correcting a feedforward control value using at least one of a fuel-cut control signal, an ignition-retarding control signal, an EGR control signal and an air fuel ratio control signal which are parameters indicating a burned state of the engine (1).
51 Citations
3 Claims
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1. A vapor-temperature control system for an evaporator for controlling an actual temperature (Ts) of a vapor generated by an evaporator (3) for heating a liquid-phase working medium by an exhaust gas from an engine (1) to a target vapor temperature (Tst),
characterized in that said system comprises a liquid-phase working medium supply amount varying means (7) for varying the amount of liquid-phase working medium supplied to the evaporator (3), and a control means (11) for controlling the amount of liquid-phase working medium supplied by the liquid-phase working medium supply amount varying means (7), based on a parameter indicating the burned state of the engine (1).
Specification