Vehicle exhaust component arrangement

An exhaust component arrangement for an off-road vehicle having an engine, a transmission mounted between the engine and a cab, and a fuel tank adjacent the cab, rearward of the engine and transmission, and below a portion of the cab, the exhaust treatment component arrangement comprising:

• a oxidation catalyst positioned rearwardly of the engine and above the transmission;
• a first exhaust pipe communicating exhaust from the engine to the oxidation catalyst, the first exhaust pipe extending generally rearwardly from the engine to the oxidation catalyst;
• a particulate filter positioned rearwardly and below the oxidation catalyst, and positioned in front of a lower portion of the cab;
• a second exhaust pipe communicating exhaust from the oxidation catalyst to the particulate filter;
• a NOx reduction unit positioned below and to one side of the particulate filter and positioned below a front portion of the cab and above the fuel tank;
• a third exhaust pipe communicating exhaust from the particulate filter to the NOx reduction unit;
• and
• a fourth exhaust pipe communicating exhaust from the NOx reduction unit to the environment.

An exhaust treatment component arrangement for an off-road vehicle having an engine, a transmission mounted between the engine and a cab, and a fuel tank adjacent the cab, rearward of the engine and transmission, and below a portion of the cab, the exhaust treatment component arrangement comprising:

• a oxidation catalyst positioned rearwardly of the engine and above the transmission;
• a first exhaust pipe communicating exhaust from the engine to the oxidation catalyst, the first exhaust pipe extending generally rearwardly from the engine to the oxidation catalyst;
• a particulate filter positioned rearwardly and below the oxidation catalyst, and positioned in front of a lower portion of the cab;
• a second exhaust pipe communicating exhaust from the oxidation catalyst to the particulate filter;
• a NOx reduction unit positioned below and to one side of the particulate filter and positioned below a front portion of the cab and above the fuel tank, the fuel tank having a recess in an upper surface thereof, and a lower portion of the NOx reduction unit being received in said recess;
• a third exhaust pipe communicating exhaust from the particulate filter to the NOx reduction unit;
• and
• a fourth exhaust pipe communicating exhaust from the NOx reduction unit to the environment.

An exhaust component arrangement for an off-road vehicle having an engine, a cab, a transmission connected to the engine, and a fuel tank adjacent the transmission, a portion of the fuel tank being positioned below a portion of the cab, the exhaust component arrangement comprising:

• a particulate filter unit, the particulate filter unit being positioned rearwardly and below the oxidation catalyst unit, and positioned in front of a lower portion of the cab;
• a NOx reduction unit, the NOx reduction unit being positioned below and to one side of the particulate filter unit and is positioned below a front portion of the cab and above the fuel tank;
• an oxidation catalyst unit, said units being connected in series, the fuel tank having a recess formed in an upper surface thereof, and a lower portion of one of the units being received in said recess, the oxidation catalyst unit being positioned rearwardly of the engine and above the transmission;
• a first exhaust pipe communicating exhaust from the engine to the oxidation catalyst unit, the first exhaust pipe extending generally rearwardly from the engine to the oxidation catalyst unit;
• a second exhaust pipe communicating exhaust from the oxidation catalyst unit to the particulate filter unit;
• a third exhaust pipe communicates exhaust from the particulate filter unit to the NOx reduction unit;
• and
• a fourth exhaust pipe communicates exhaust from the NOx reduction unit to the environment.

An exhaust component arrangement for an off-road vehicle having an engine, a cab, an exhaust pipe adjacent a front corner of the cab through which exhaust flows upwardly, a transmission connected to the engine, and a fuel tank adjacent the transmission, a portion of the fuel tank being positioned below a front corner portion of the cab, the exhaust component arrangement comprising:

• a particulate filter unit;
• a NOx reduction unit;
• and
• an oxidation catalyst unit, said units being connected in series, the fuel tank having an upwardly opening recess formed in only an upper surface thereof, and a lower portion of one of the units being received in said recess, said one unit being connected to the exhaust pipe.