| 摘要 |
PURPOSE:To provide stable switching control for an engine, wherein a choke valve and a throttle valve are controlled by respective step motors, by changing the set temp. for switching from the cold to hot range and vice versa in linkage with the temp. at the starting time of the engine. CONSTITUTION:When ignition switch is turned on to actuate emission of an output from an ignition switch sensor 12, a mono-multi 127A is triggered to generate a pulsated output, which is fed to a reference setting value memory 127B. In this memory 127B is stroed a reference setting value Ts for interface between the cold and hot renges using the engine temp. Te as parameter, and if a pulse is fed previously a predetermined reference setting value Ts in accordance with the current output Te from an engine temp. sensor 123 is read and stored in the register 127C. The sum and difference of/between the refeence setting value Ts and differential temperature alpha are determined by an adding device 127E and subtracting device 127F to provide the upper setting value TO and lower setting value TI, and now smooth idling control is made through Terminal Q of an FF 127K with the aid of No.1 and No.2 comparators 127G, 127H. |
