METHOD AND SYSTEM FOR MEASURING THE MASS FLOW BY MEANS OF DILUTION OF AN EXHAUST GAS FROM INTERNAL COMBUSTION

摘要

The present invention relates to a method for measuring the content of at least one compound in an exhaust gas stream resulting from internal combustion. A first relative proportion of a first compound in the exhaust gas stream is measured by means of a first sensor, and a defined flow of a first gas is added to said exhaust gas stream downstream said first sensor. A second relative proportion of said first compound in the combined stream of said exhaust gas stream and said added gas is measured by means of a second sensor, and a mass flow of said first compound in said exhaust gas stream resulting from said combustion in said internal combustion is determined by means of said first and second relative proportions and said defined flow of said first gas. The invention also relates to a system and vehicle dynamometer.

主权项

1. Method for measuring at least one compound in an exhaust gas stream resulting from internal combustion, said method including:
by means of a first sensor, measuring a first relative proportion of a first compound in the exhaust gas stream, downstream said first sensor, adding a defined flow of a first gas to said exhaust gas stream, by means of a second sensor, measuring a second relative proportion of said first compound in the combined stream of said exhaust gas stream and said added gas, and determining a mass flow of said first compound in said exhaust gas stream resulting from said combustion in said internal combustion by means of said first and second relative proportions and said defined flow of said first gas.