The diffuser can be used at an end of a vehicle exhaust system. The diffuser can have a generally hollow body with an inlet for receiving exhaust gasses from a substantially vertically-extending component of the vehicle exhaust system, and a substantially flat outlet grate through which the exhaust
The diffuser can be used at an end of a vehicle exhaust system. The diffuser can have a generally hollow body with an inlet for receiving exhaust gasses from a substantially vertically-extending component of the vehicle exhaust system, and a substantially flat outlet grate through which the exhaust gasses are to be released to the atmosphere, the outlet grate being configured and adapted for use in a roof of the vehicle, in an aligned position therewith, with the hollow body of the diffuser positioned inside the vehicle and below the outlet grate.
대표청구항▼
What is claimed is: 1. A diesel engine vehicle having a passenger area surrounded by walls and covered by a roof, a chamber inside the walls and partitioned from the passenger area, and a heat-emitting exhaust treatment unit having an outlet extending upwardly inside the chamber, and a diffuser hav
What is claimed is: 1. A diesel engine vehicle having a passenger area surrounded by walls and covered by a roof, a chamber inside the walls and partitioned from the passenger area, and a heat-emitting exhaust treatment unit having an outlet extending upwardly inside the chamber, and a diffuser having a hollow body having a proximal end, and a distal end oriented at least partially toward a forward direction of the vehicle relative to the proximal end, a diffuser inlet at the proximal end being connected to an exhaust pipe of the exhaust treatment unit, and a flat outlet grate extending above the hollow body of the diffuser, between the proximal end and the distal end, and oriented parallel to and positioned flush with a surrounding portion of the roof, the flat outlet grate forming a diffuser outlet leading out from the roof of the vehicle, the flat outlet grate also comprising vanes oriented at least partially toward a rear direction of the vehicle; further comprising a closure pivotally mounted within the hollow body, the closure being pivotally biased towards a closed position, against the inlet, the closure being pivotable into an open position, against the bias, by a force exerted by exhausting gasses. 2. A diesel engine vehicle having a passenger area surrounded by walls and covered by a roof, a chamber inside the walls and partitioned from the passenger area, and a heat-emitting exhaust treatment unit having an outlet extending upwardly inside the chamber, and a diffuser having a hollow body having a proximal end, and a distal end oriented at least partially toward a forward direction of the vehicle relative to the proximal end, a diffuser inlet at the proximal end being connected to an exhaust pipe of the exhaust treatment unit, and a flat outlet grate extending above the hollow body of the diffuser, between the proximal end and the distal end, and oriented parallel to and positioned flush with a surrounding portion of the roof, the flat outlet grate forming a diffuser outlet leading out from the roof of the vehicle, the flat outlet grate also comprising vanes oriented at least partially toward a rear direction of the vehicle; wherein the hollow body has a lower recess having a drain, and is shaped for channeling liquids toward the drain under the effect of gravity. 3. A diesel engine vehicle having a passenger area surrounded by walls and covered by a roof, a chamber inside the walls and partitioned from the passenger area, and a heat-emitting exhaust treatment unit having an outlet extending upwardly inside the chamber, and a diffuser having a hollow body having a proximal end, and a distal end oriented at least partially toward a forward direction of the vehicle relative to the proximal end, a diffuser inlet at the proximal end being connected to an exhaust pipe of the exhaust treatment unit, and a flat outlet grate extending above the hollow body of the diffuser, between the proximal end and the distal end, and oriented parallel to and positioned flush with a surrounding portion of the roof, the flat outlet grate forming a diffuser outlet leading out from the roof of the vehicle, the flat outlet grate also comprising vanes oriented at least partially toward a rear direction of the vehicle; wherein the hollow body is wedge-shaped, and the inlet is provided opposite a tip of the wedge shape. 4. An exhaust gas diffuser comprising: a hollow body shaped generally as a wedge, having a flat outlet with a plurality of slanted vanes, a sloping wall defining a wedge angle with the outlet and connecting the outlet grate at a tip of the hollow body, two opposite lateral walls connecting the sloping wall and the outlet, and an inlet opposite the tip connectable to an exhaust system of a vehicle, the sloping wall and the two opposite lateral walls forming a closed passage between the inlet and the outlet grate. 5. The exhaust gas diffuser of claim 4 wherein the vanes are oriented to guide exhausting gasses in a direction at least partially opposite to the general direction at which the exhausting gasses enter the diffuser through the inlet. 6. The exhaust gas diffuser of claim 4 further comprising an inlet pipe connected to the inlet and defining an elbow with the hollow body. 7. The exhaust gas diffuser of claim 4 wherein the outlet has an area having a ratio of above 3:1 with an area of the inlet. 8. The exhaust gas diffuser of claim 4 wherein the vanes are provided as part of an outlet grate and are inclined between 40° and 80° relative to the outlet grate, and interspaced between ¼ and ¾ inches apart. 9. The exhaust gas diffuser of claim 4 further comprising a closure pivotally mounted within the hollow body, the closure being pivotlally biased into a closed position, against the inlet, the closure being pivotable from the closed position into an open position, against the bias, by a force exerted by exhausting gasses; and a drain positioned at an end of the sloping wall, opposite the tip. 10. The exhaust gas diffuser of claim 4 having a check valve allowing gasses through the diffuser inlet and out the diffuser outlet when the engine is running, but substantially preventing liquids in the hollow body from entering the exhaust pipe outlet when the engine is stopped: 11. The exhaust gas diffuser of claim 10 wherein the check valve has a pivotable flap which opens in a downward direction inside the hollow body under a force applied by the exhausting gasses, and a counterweight that automatically closes the flap back against the exhaust pipe outlet when the engine is stopped. 12. The exhaust gas diffuser of claim 4 wherein the hollow body is shaped for the exhaust gasses to travel roughly parallel to the grate before being released into the atmosphere through the grate. 13. A diesel engine vehicle having a passenger area surrounded by walls and covered by a roof, a chamber inside the walls and partitioned from the passenger area, and a heat-emitting exhaust treatment unit having an outlet extending upwardly inside the chamber, and a diffuser having a hollow body having a proximal end, and a distal end oriented at least partially toward a forward direction of the vehicle relative to the proximal end, a diffuser inlet at the proximal end being connected to an exhaust pipe of the exhaust treatment unit, and a flat outlet grate extending above the hollow body of the diffuser, between the proximal end and the distal end, and oriented parallel to and positioned flush with a surrounding portion of the roof, the flat outlet grate forming a diffuser outlet leading out from the roof of the vehicle, the flat outlet grate also comprising vanes oriented at least partially toward a rear direction of the vehicle; wherein the hollow body forms a closed passage guiding the exhaust gasses from the inlet to the outlet; wherein the hollow body is substantially wedge-shaped, and the inlet is provided opposite a tip of the wedge shape further comprising a closure pivotally mounted within the hollow body, the closure being pivotally biased into a closed position, against the inlet, the closure being pivotable from the closed position into an open position, against the bias, by a force exerted by exhausting gasses; wherein the grate includes a plurality of interspaced vanes for orienting the exhaust gasses at least partially toward the rear of the vehicle; and wherein the hollow body has a lower recess having a drain, and is generally shaped for channeling liquids in the hollow body toward the drain under the effect of gravity. 14. The exhaust gas diffuser of claim 13 wherein the vanes are interspaced, the tip of the wedge shape is oriented at least partially toward a front direction of the vehicle, and the vanes are inclined upwardly between 40° and 80° relative to the grate, in a direction opposite to the tip of the wedge shape, and interspaced between ¼ and ¾ inches apart.
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