Intake device for diesel engine

Abstract

PURPOSE: To secure the best combustion state constantly by detecting the state of exhaust gas by a combustion state detector, and performing the feedback of the detected result to an intake quantity control device so as to control the opening of an intake quantity regulating valve. CONSTITUTION: A solenoid operated intake quantity regulating valve 5 is interposed in an intake passage 3 communicated with the combustion chamber 2 of a diesel engine, as well as a combustion state detector 6 for detecting the state of exhaust gas is provided at the intermediate part of an exhaust passage 4, and the output signal thereof is inputted into an intake quantity control device 7. When the signal value of the input signal is less than the specified threshold value, an opening/closing degree control signal, obtained from a pulse signal provided with the specified voltage and the pulse value computed on the basis of the threshold value and combustion state signal, is outputted from the intake quantity control device 7. The actuator 8 of the intake quantity regulating valve 5 is drivenly controlled by this opening/closing degree control signal so as to regulate the opening of the intake quantity regulating valve 5. COPYRIGHT: (C)1991,JPO&Japio

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