| 摘要 |
PURPOSE:To promote the temperature rise of intake and improve starting property of an engine by disposing a plurality of electric heaters in parallel in an intake path and providing a current control means for supplying current to the electric heater and an intake control means for conducting intake to the electric heater. CONSTITUTION:An intake bypass path 7 is divided into first and second paths 7a, 7b in which are disposed first and second electric heaters 8, 9 independent of each other. Heater relays 20, 21 supply current to the respective electric heaters 8, 9 in cranking. First and second switch valves 10, 11 supply intake to the electric heaters 8, 9 having at least a predetermined temperature. Thus, the temperature rise of intake is promoted and the starting property of an engine is improved. |
