| 摘要 |
An exhaust heating apparatus has a housing defining a firing chamber jointed to an exhaust pipe, a fuel supply valve for injecting fuel to the firing chamber communicated with the exhaust passage through a junction port, a glow plug for igniting the injected fuel. A part of the exhaust gas flowing in the exhaust passage flows into the firing chamber and again flowing out to the exhaust passage together with a combustion gas generated in the firing chamber. An angle between a wall surface in the exhaust pipe positioned upstream of the junction port and an upstream wall surface in the housing, and an angle between a wall surface in the exhaust pipe positioned downstream of the junction port and a downstream wall surface in the housing, are set to an obtuse angle, respectively.
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