| 摘要 |
<p>An exhaust heating apparatus (22) according to the present invention includes a housing (27) jointed to an exhaust pipe (23) so as to define a firing chamber (30), a fuel supply valve (28) for injecting fuel to the firing chamber communicating with the exhaust passage through a junction port (23b) formed on the exhaust pipe, and a glow plug (29) for igniting the injected fuel, wherein a part of the exhaust gas flowing in the exhaust passage flows from the junction port into the firing chamber and again flows out from the junction port to the exhaust passage together with a combustion gas generated in the firing chamber, an angle (¸ 1 ) between a wall surface in the exhaust pipe positioned upstream of the junction port in the exhaust passage and an upstream wall surface (27 U ) in the housing is set to an obtuse angle, and an angle (¸ 2 ) between a wall surface in the exhaust pipe positioned downstream of the junction port in the exhaust passage and a downstream wall surface (27 D ) in the housing is set to an obtuse angle.</p> |
