| 摘要 |
PROBLEM TO BE SOLVED: To improve, in an atmospheric detecting system in an atmospheric sensor-less, operation frequency and accuracy of atmospheric pressure relating values to in every driving region through using properly information of, an intake pipe pressure, revolution, filling efficiency and a throttle opening degree according to a driving region. SOLUTION: There are provided: various types of sensors 17, 25 for detecting operational state of an internal-combustion engine; an internal-combustion engine revolution speed sensor 14; an airflow sensor 10; a throttle sensor 16a; an intake pressure sensor 13; a memory device 8 in which a filling efficiency corresponding to the revolution speed and the throttle opening degree in a reference atmospheric pressure is made into a two-dimensional map to be memorized, and is set in advance and which outputs the memorized and set value according to the revolution speed and the throttle opening degree; and furthermore a central processing unit 7 for compensating the atmospheric pressure relating values, containing an atmospheric pressure calculated based on information of, an intake air volume, the revolution speed, the filling efficiency and the throttle opening degree, of the internal-combustion engine, by the atmospheric pressure relating values containing an atmospheric pressure calculated based on information of, the revolution speed, the throttle opening degree and the intake pipe pressure, of the internal-combustion engine. COPYRIGHT: (C)2003,JPO
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