Cooling structure for urea aqueous solution conduit

A cooling structure of a urea aqueous solution pipe laid to a selective catalytic reduction device in an exhaust gas aftertreatment device, the exhaust gas aftertreatment device being provided in an engine compartment that is adjacent to a cooling fan through which cooling air is supplied to a heat exchanger, the selective catalytic reduction device using ammonia obtained from a urea aqueous solution is used as a reduction-causing agent, the urea aqueous solution pipe supplying the urea aqueous solution to the selective catalytic reduction device through the engine compartment, the cooling structure comprising:

• a pipeline-forming member provided in the engine compartment and comprising a pipeline in which the urea aqueous solution pipe is arranged, wherein:
• the cooling air sucked by the cooling fan flows in the pipeline.

A cooling structure of a urea aqueous solution pipe laid to a selective catalytic reduction device in an exhaust gas aftertreatment device, the exhaust gas aftertreatment device being provided in an engine compartment to which a cooling fan is provided, the selective catalytic reduction device using ammonia obtained from a urea aqueous solution as a reduction-causing agent, the urea aqueous solution pipe supplying the urea aqueous solution to the selective catalytic reduction device through the engine compartment, the cooling structure comprising:

• a pipeline-forming member provided in the engine compartment and comprising a pipeline in which the urea aqueous solution pipe is arranged, wherein:
• insulation space is juxtaposed with the pipeline-forming member, and
• cooling air sucked by the cooling fan flows in at least one of the pipeline and the insulation space.

A cooling structure of a urea aqueous solution pipe laid to a selective catalytic reduction device in an exhaust gas aftertreatment device, the exhaust gas aftertreatment device being provided in an engine compartment to which a cooling fan is provided, the selective catalytic reduction device using ammonia obtained from a urea aqueous solution as a reduction-causing agent, the urea aqueous solution pipe supplying the urea aqueous solution to the selective catalytic reduction device through the engine compartment, the cooling structure comprising:

• a pipeline-forming member provided in the engine compartment and comprising a pipeline in which the urea aqueous solution pipe is arranged, wherein:
• insulation space is juxtaposed with the pipeline-forming member, and
• cooling air sucked by the cooling fan flows in the pipeline and the insulation space.