| 摘要 |
PURPOSE:To make engine operatability improvable during the cold season, by leading the boiled steam into an intake manifold via a control valve, and heating the suction air, in case of an engine cooling with boiling evaporation latent heat of a refrigerant. CONSTITUTION:When running at an urban district where fuel consumption or auto exhaust is at issue is detected by an ignition pulse, etc., a modulator 7 turns on a three-way solenoid valve 6, leading suction pressure into a suction pressure chamber 20 and opening a control valve 4, and the boiled steam produced at a water jacket 16 is led into a steam gallery 2, then suction air inside an intake manifold 18 is heated by its liquefied latent heat whereby engine operatability during the cold season is improved and simultaneously an air-fuel ratio can be set to rarest possible extent in time of running at an urban district, making improvements in fuel consumption and exhaust gas at issue. In addition, in time of high-speed running, the three-way solenoid valve 6 is turned to OFF, closing the control valve 4, and heating of the suction air is suspended, thus charging efficiency is improved.
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