Abstract: A method for accelerated aging of an automotive catalytic converter under conditions incorporating cold start simulation.

Abstract: The present application relates in general to methods for testing the performance of an automotive catalytic converter under conditions simulating those which occur in motor vehicles over extended driving conditions.

Abstract: A method for controlling diesel engine emissions is disclosed. The diesel engine's exhaust system has a diesel particulate filter (DPF) and a lean NOx trap (LNT). The DPF is a filter and is monitored to determine the need for regeneration. The LNT is monitored to determine the need for regeneration or desulfurization. A fuel injector is used to inject fuel upstream of the LNT under certain conditions, and a bypass may be used to bypass exhaust around the DPF to provide richer or hotter exhaust to the LNT. The sensor outputs and controls for providing the appropriate heat or fuel mix for regeneration and desulfurization may be controlled with enhancements to existing engine control circuitry.

Abstract: A method for controlling diesel engine emissions is disclosed. The diesel engine's exhaust system has a NOx oxidation catalyst, a diesel particulate filter (DPF), and a lean NOx trap (LNT). The DPF is monitored to determine the need for regeneration. The LNT is monitored to determine the need for regeneration or desulfurization. A fuel injector is used to inject fuel upstream of the LNT under certain conditions, and a bypass may be used to bypass exhaust around the oxidation catalyst to provide richer or hotter exhaust to the LNT.

Abstract: The present application relates in general to an apparatus and to methods for testing the performance of an automotive catalytic converter under conditions simulating those which occur in motor vehicles over extended driving conditions. The application provides a novel swirl plate and a novel fuel injector which enable the burner to run stoichiometric for extended periods of time.

Abstract: A sampling device for collecting exhaust samples that are proportional in amount to the total amount of exhaust during a given sampling period. A sample flow is pumped through the device, which has a filter for collecting particulates and a sample bag for collecting gas exhaust. The sampling device permits a baseline dilution air flow rate to be fixed by having a pair of parallel valves between the filter and the pump(s). During baselining, one valve is open and adjusted and one is closed and only dilution air flows through the device. Then, for sample acquisition, the second valve is also opened. A processing unit monitors the actual sample flow, compares it to a target flow rate, and adjusts the second valve as needed to maintain the desired proportionality.