Patent ID: 8549844

Claim:
An exhaust gas after treatment apparatus in a motor vehicle, the exhaust gas after treatment apparatus comprising: a supply pipe for supplying exhaust gas to be purified; an inflow chamber; a first catalytic converter element and a second catalytic converter element for purifying the exhaust gas, wherein a flow of fluid through said first catalytic converter element is in a direction opposite a flow of fluid through said second catalytic converter element; a collection chamber for collecting the exhaust gas purified by at least said first catalytic converter element; and an exhaust pipe for discharging purified exhaust gas, wherein the supply pipe and the inflow chamber are manufactured from a first material having a higher corrosion resistance against the exhaust gas to be purified, wherein at least the collection chamber is formed from a second material having a lower corrosion resistance against the exhaust gas to be purified, wherein the inflow chamber is adapted to distribute the exhaust gas to be purified to said first catalytic converter element and said second catalytic converter element, at least a portion of said inflow chamber being arranged between said first catalytic converter element and said second catalytic converter element, at least a portion of one end portion of said supply pipe being arranged in at least a portion of said inflow chamber.