Patent ID: 8420019
Filing Date: 2013-04-16
Classification: E02F,F01N,Y02A

Abstract:
1. An exhaust gas treatment apparatus comprising an upstream cylinder provided in an exhaust gas passage of an engine mounted on a vehicle body, a downstream cylinder provided on a downstream side of said upstream cylinder, and a purifying part cylinder which is provided between said upstream cylinder and said downstream cylinder by being detachably connected in series in a direction of an axis of each of said cylinders and in which a treatment member for effecting purification treatment of exhaust gas is incorporated, said purifying part cylinder is connected in series in a horizontal direction between said upstream cylinder and said downstream cylinder, said exhaust gas treatment apparatus comprising: said upstream cylinder, said downstream cylinder, and said purifying part cylinder are provided with flange portions having connecting surfaces which are connected in a mutually opposing state, connecting surfaces of said flange portions for connecting said upstream cylinder and said purifying part cylinder and/or connecting surfaces of said flange portions for connecting said downstream cylinder and said purifying part cylinder are formed by inclined connecting surfaces which are inclined diagonally with respect to a direction perpendicular to the direction of the axis of each of said cylinders, at least one of said inclined connecting surfaces provided on said purifying part cylinder is configured to be formed as a downwardly inclined connecting surface which is inclined diagonally downward such that a size of a lower surface side of said purifying part cylinder disposed in a horizontal direction becomes smaller than that of an upper surface side thereof, and said inclined connecting surface provided on at least one of said upstream cylinder and said downstream cylinder is configured to be formed as an upwardly inclined connecting surface which is inclined diagonally upward such that a size of the upper surface side of said upstream cylinder and/or said downstream cylinder disposed in a horizontal direction becomes smaller than that of the lower surface side thereof.