Test method for an exhaust gas catalytic converter and a corresponding testing device
First Claim
Patent Images
1. A test method for an exhaust gas catalytic converter of an internal combustion engine comprising the steps of:
- Test injection of fuel during the expansion stroke and/or during the exhaust stroke of the internal combustion engine, Conversion in the exhaust gas catalytic converter of at least a part of the unburned fuel contained in the exhaust gas of the internal combustion engine, Exhaust gas recirculation of exhaust gas removed downstream of the exhaust gas catalytic converter, together with the unconverted fuel from the test injection, into an intake manifold of the internal combustion engine, Determination of the increase in power of the internal combustion engine, which increase results from the exhaust gas recirculation of the unconverted fuel, Determination of the quantity of unconverted fuel in the exhaust gas catalytic converter from the increase in power of the internal combustion engine, and Determination of the operating capacity of the exhaust gas catalytic converter from the quantity of unconverted fuel.
2 Assignments
0 Petitions
Accused Products
Abstract
A test method for an exhaust gas catalytic converter (8) of an internal combustion engine (1) comprises the steps of: test injection of fuel during the expansion stroke and/or during the exhaust stroke of the internal combustion engine (1), conversion in the exhaust gas catalytic converter (8) of at least a part of the unburned fuel contained in the exhaust gas of the internal combustion engine, determination of the quantity of fuel not converted by the exhaust gas catalytic converter (8) and determination from the quantity of unconverted fuel of the operating capacity of the exhaust gas catalytic converter (8).
-
Citations
16 Claims
-
1. A test method for an exhaust gas catalytic converter of an internal combustion engine comprising the steps of:
-
Test injection of fuel during the expansion stroke and/or during the exhaust stroke of the internal combustion engine, Conversion in the exhaust gas catalytic converter of at least a part of the unburned fuel contained in the exhaust gas of the internal combustion engine, Exhaust gas recirculation of exhaust gas removed downstream of the exhaust gas catalytic converter, together with the unconverted fuel from the test injection, into an intake manifold of the internal combustion engine, Determination of the increase in power of the internal combustion engine, which increase results from the exhaust gas recirculation of the unconverted fuel, Determination of the quantity of unconverted fuel in the exhaust gas catalytic converter from the increase in power of the internal combustion engine, and Determination of the operating capacity of the exhaust gas catalytic converter from the quantity of unconverted fuel. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A testing device for an exhaust gas catalytic converter of an internal combustion engine comprising:
-
an injection system for the test injection of a predetermined quantity of fuel during an expansion stroke and/or during an exhaust stroke of the internal combustion engine, an exhaust gas recirculation device for removing exhaust gas from the exhaust gas flow of the internal combustion engine downstream of the exhaust gas catalytic converter and for recirculating the removed exhaust gas into an intake manifold located upstream of the internal combustion engine, a measuring device for recording the increase in power of the internal combustion engine caused by the test injection, and an evaluation unit for determining the operating capacity of the exhaust gas catalytic converter dependent on the quantity of fuel injected and the resulting increase in power. - View Dependent Claims (8, 9, 10)
-
-
11. A test method for an exhaust gas catalytic converter of an internal combustion engine comprising the steps of:
-
Injecting fuel during the expansion stroke and/or during the exhaust stroke of the internal combustion engine, Converting in the exhaust gas catalytic converter of at least a part of the unburned fuel contained in the exhaust gas of the internal combustion engine, Recirculating exhaust gas removed downstream of the exhaust gas catalytic converter, together with the unconverted fuel from the test injection, into an intake manifold of the internal combustion engine, Determining the increase in power of the internal combustion engine, which increase results from the exhaust gas recirculation of the unconverted fuel, Determining the quantity of unconverted fuel in the exhaust gas catalytic converter from the increase in power of the internal combustion engine, and Determining the operating capacity of the exhaust gas catalytic converter from the quantity of unconverted fuel. - View Dependent Claims (12, 13, 14, 15, 16)
-
Specification