Patent ID: 8425224

Claim:
A burner-based system for generating exhaust gas that simulates exhaust gas from an internal combustion engine and for delivering the exhaust gas to an emissions control device for testing of the emissions control device in accordance with a predetermined aging cycle having a specified exhaust flow rate and extending over at least one diurnal time period, comprising: a main flow line; a forced air device for forcing air along the main flow line and having an output control mechanism; a burner downstream the forced air device; a fuel injector for delivering fuel to the burner located downstream from the burner, the injector having an atomizing fuel sprayer; wherein the burner combusts a mixture of air and fuel, thereby providing exhaust gas; a sensor for measuring the mass air flow within the flow line; a heat exchanger for controlling the temperature of exhaust gas delivered to the emissions control device; a control unit in communication with various test probes, the test probes measuring system temperatures, mass air flow for the burner, and air to fuel ratio for the burner, the control unit controls parameters based on measurements from the probe to control ignition, air assist to fuel injection, fuel feed, and blower air; the control unit programmed to store at least one mass air flow rate setpoint and to perform the following tasks: receiving mass air flow data from the sensor, using the mass air flow data to generate a correction voltage value, using the correction value to generate a voltage output signal delivered to the output control mechanism of the forced air device.