Patent ID: 9212590
Filing Date: 2015-12-15
Classification: F01N,F02B,F02D,F02M,Y02T,Y10T

Abstract:
1. A method of operating an internal-combustion engine having at least one combustion chamber with an exhaust gas outlet port and an exhaust system arranged on the exhaust gas outlet port, a secondary air injection site configured to inject secondary air into the exhaust system between the at least one combustion chamber and a downstream emission control system, the method of operating the internal-combustion engine comprising the acts of: changing a residual gas content in the at least one combustion chamber during operation of the internal-combustion engine; injecting the secondary air into the exhaust system at the secondary air injection site; and drawing the injected secondary air back into the exhaust gas outlet port but not back into the at least one combustion chamber.