| 摘要 |
<p>PURPOSE:To detect the air quantity with sufficient accuracy even if the storage capacity required for a table is small by substructing in advance a prescribed value from the respective pulses of a detecting signal, thereafter, executing a table retrieval. CONSTITUTION:When a flip-flop 4 is set by a signal from a crank angle sensor 15, its output -Q terminal goes to LOW, a transistor Tr 7 is turned off and a transistor Tr 8 is turned on. On the other hand, when the flip-flop 4 is reset by an output of a comparator 3, the -Q terminal goes to HIGH, the Tr 7 is turned on and the Tr 8 is turned off. As a result, from the output Q terminal of the flip-flop 4, a pulse signal corresponding to the air flow rate Qa is obtained. Subsequently, the pulse signal of the Q terminal of the flip-flop 4 inputted to a microcomputer 23 through an arithmetic circuit 16, in which an air quantity Qa/an engine rotational frequency N is calculated by a retrieval arithmetic processing of a two-dimensional table, and used for controlling an engine fuel supply quantity.</p> |
