| 摘要 |
<p>The present invention ignition timing control system for an internal combustion engine comprises: a controller (6) having a memory integrally packaged therewith, the controller (6) operating to output an ignition signal based on a program and control data stored in the memory; and an external rewritable memory (22, 32, 42) which stores the control data and which is connected externally to the controller (6), wherein the memory of the controller (6) comprises a RAM (21, 31, 32) and a mask ROM (20, 30, 40), the program being stored in the mask ROM (20, 30, 40), and the controller (6) comprises data transfer control means for, in response to an operating voltage being applied to the controller (6), transferring the control data stored in the external rewritable memory (22, 32, 42) to the RAM (21, 31, 32) of the controller (6). Thus, by changing the control data in the rewritable external memory (22, 32, 42) it is possible to easily adjust the system depending on the type and/or usage of the engine. <IMAGE></p> |
