Patent ID: 9057300
Filing Date: 2015-06-16
Classification: F01N,Y02T

Abstract:
1. A reducing agent metering system for injection of a reducing agent into the exhaust gas flow of an internal combustion engine for selective catalytic reduction comprising a delivery pump ( 2 ) by means of which the reducing agent is delivered from a reducing agent tank ( 1 ) via a delivery line ( 3 ) and is introduced into the exhaust gas flow of the internal combustion engine via at least one nozzle ( 7 ), wherein a metering chamber ( 4 ) is integrated into the delivery line ( 3 ) and is divided into two separate volumes ( 10 , 20 ) by means of a position-variable element ( 5 ), each of the two volumes ( 10 , 20 ) having at least one input ( 11 , 21 ) and at least one output ( 12 , 22 ) and wherein the inputs ( 11 , 21 ) of the two volumes ( 10 , 20 ) are connected to the delivery line ( 3 ) of the pump ( 2 ) and are fed from the delivery line ( 3 ).