Chassis Dynamometer Smoke Testers

Van Leeuwen Test Systems BV (VLT)

A chassis dynamometer smoke tester (CDST) is used to test diesel emissions when the engine is under load. This is of course a much more realistic test than the commonly used free acceleration test. It is also better for the diesel engine.
During a CDST test an automatic test cycle is performed, whereby the emission is measured at different engine loads. The monitor shows checks and actions to perform before the test, shows real-time measuring data and instructions for the driver during the test, and the end results after the test.