Doosan DA40 - Exhaust system XPI; Introduction System overview

SHOP MANUAL
Engine
Ch 1 page 24
Exhaust system XPI
New, more stringent requirements for exhaust emissions will come into force as of 2011. To meet these new
requirements for exhaust emissions, a technology will be used which is known as SCR, Selective Catalytic
Reduction. This technology involves aftertreatment of the exhaust gases using reductant and catalytic convert-
ers in order to reduce the amount of nitrogen oxide in the exhaust gases.
Selective catalytic reduction and controlled fuel injection with an XPI fuel injection system are used to effec-
tively clean the exhaust gases and remove harmful substances in them.
Introduction System overview
1 Reductant tank
2 Electrically heated reductant hose
3 Coolant valve
4 Electrically heated reductant hose
5 Coolant hose
6 Hydrolysis catalytic converter
7 NOx sensor
8 SCR catalytic converter
9 Temperature sensor
10 Coolant hose
11 Reductant pump
12 Reductant doser
Figure 37