| 摘要 |
PURPOSE:To provide correct compensation of air-fuel ratio especially at a high land by allowing the pressure source entering the pressure-sensor unit to act as both the pressure in an intake pipe and the atmospheric pressure by means of a switching device acting at a defined timing. CONSTITUTION:The pressure in an intake pipe and the atmospheric pressure are connected to the pressure source switching valve 1 by turns and are put into the pressure-sensor 2. The signal from the sensor 2, is put into the fuel injection-operation circuit 10 together with those signals from the cooling water temperature-sensor 3 and the number of rotation-ensor 4. The control circuit 5 has the switching circuit 12 operated by the operation circuit 10 and its output signal switches the switching- valve 1 at the defined timing. And the output signal from the operation circuit 10 goes through the output circuit 11 then operates the electromagnetic type injection valve 6. In this way, the amount of jet at a highland is compensated automatically. |
