| 摘要 |
<p>PURPOSE:To enable the supercharge pressure of an engine to be controlled to an optimum level without causing damage in the engine even when a trouble is generated in a supercharge pressure sensor, by driving a valve mechanism in an exhaust-gas bypass passage to be controlled by a corrective value stored in a memory control means when it detects abnormality of a supercharge pressure detecting means. CONSTITUTION:A memory control means 71 fetches and stores corrective value data given from a correction control means 68. The memory control means 71, fetching a detection value P2 output from a supercharge pressure sensor 27, decides the supercharge pressure sensor 27 whether or not it causes abnormality. The memory control means 71, if it decides the supercharge pressure sensor 27 generating a trouble, disconnects an arithmetic means 66 from an adder 63 for a solenoid valve 47 controlling a valve in a variable displacement mechanism. The memory control means 71, after it opens a disconnecting means 72, controls thereafter a solenoid valve 51, which controls a valve in an exhaust-gas bypass mechanism, to be opened and closed by the data immediately before recognizing the abnormality being generated.</p> |
