EXHAUST TREATMENT UNIT AND WORK VEHICLE HAVING EXHAUST TREATMENT UNIT

摘要

An exhaust treatment unit for a work vehicle includes a selective catalytic reduction apparatus, a connection pipe, an ejection apparatus attached to the connection pipe, a first pipe section that guides coolant to the ejection apparatus, a second pipe section that discharges coolant from the ejection apparatus, first and second retaining sections, and a coolant pump. The ejection apparatus ejects reducing agent into exhaust supplied to the selective catalytic reduction apparatus. The first and second retaining sections retain coolant and are connected to the first and second pipe sections above the ejection apparatus, respectively. The coolant pump is driven by an engine driving force and supplies the coolant to the ejection apparatus via the first pipe section. The first and second pipe sections extend upward from first and second connecting sections of the first and second pipe sections and the ejection apparatus toward the first and second retaining sections, respectively.

主权项

1. An exhaust treatment unit configured to treat exhaust from an engine, the exhaust treatment unit comprising:
a selective catalytic reduction apparatus configured to treat exhaust from the engine; a connection pipe installed between the engine and the selective catalytic reduction apparatus; an ejection apparatus attached to the connection pipe, the ejection apparatus being configured to eject a reducing agent into the exhaust supplied to the selective catalytic reduction apparatus; a first pipe section configured to guide coolant to the ejection apparatus to cool the ejection apparatus; a second pipe section configured to discharge the coolant from the ejection apparatus; a first retaining section configured to retain the coolant, the first retaining section being connected to the first pipe section above the ejection apparatus; a second retaining section configured to retain the coolant, the second retaining section being connected to the second pipe section above the ejection apparatus; a third pipe section connecting the engine and the first retaining section, the third pipe section being configured to guide coolant to the first retaining section to cool the ejection apparatus; a fourth pipe section connecting the engine and the second retaining section, the fourth pipe section being configured to guide coolant discharged from the ejection apparatus to the engine; and a coolant pump configured to be driven by receiving driving force from the engine, the coolant pump being configured to supply the coolant to the ejection apparatus via the first pipe section, the first pipe section extending upward from a first connecting section of the first pipe section and the ejection apparatus toward the first retaining section, and the second pipe section extending upward from a second connecting section of the second pipe section and the ejection apparatus toward the second retaining section, the first pipe section and the third pipe section being connected to a first side surface of the first retaining section, and the second pipe section and the fourth pipe section being connected to a second side surface of the second retaining section.