Heating system for chemical used in exhaust purification system

摘要

A system (10) for injecting urea solution into an exhaust system of a diesel engine (12) that powers a truck, includes a supply tank (30) that holds urea solution and a urea solution delivery system that moves urea solution from the supply tank (30) to the exhaust and injects the urea solution into the exhaust system upstream of or into a catalytic converter (22). A urea heat exchanger (70) and an exhaust heat exchanger (74) are each configured to receive coolant. The urea heat exchanger (70) is configured to receive heated coolant exiting the exhaust heat exchanger (74) and is arranged to transfer heat from the heated coolant into the urea solution within the supply tank (30). The exhaust heat exchanger (74) is configured to receive coolant from the diesel engine (12) and to transfer heat from the exhaust gas into the coolant.