| 主权项 |
1. A method for operating an internal combustion engine with an exhaust gas cleaning system that includes at least one catalytic or filter-effective exhaust gas cleaning component, where, in connection with a cold start or a warm-up of the internal combustion engine, the internal combustion engine is operated with a cold start engine operation method for heating up the exhaust gas cleaning component, the cold start engine operation method having predefined values for predefined internal combustion operation variables, comprising:
estimating an HC storage amount of hydrocarbons stored in one or more of the at least one exhaust gas cleaning component; and activating the cold start engine operation method when the estimate indicates that the HC storage amount exceeds a predefined HC storage amount limit value, wherein the cold start engine operation method comprises
controlling operation of the internal combustion engine using predefined values for internal combustion engine operation variables to produce heated exhaust gas,providing the heated exhaust gas to the at least one exhaust gas cleaning component, wherein the at least one exhaust gas cleaning component is heated by the heated exhaust gas, wherein predefined values for the internal combustion engine operation variables produce a heating gradient of the heating of the at least one exhaust gas cleaning component in a predefined desorption temperature range that falls below a predefined heating gradient maximum value, and wherein the predefined desorption temperature range is where a desorption of hydrocarbons stored in the exhaust gas cleaning component takes place and is below a start-up temperature of the heated at least one exhaust gas cleaning component. |
