Webasto Tests Show Pre-heated Engines Reduce Emissions, Improve Performance of Diesel Particulate Filters (DPFs)

An independent emissions testing lab recently showed that pre-heated engines reduce emissions and improve performance of diesel particulate filters.

Specifically the tests examine the effects of a Webasto coolant heater on the emissions performance of a diesel engine and the results indicate the benefits of pre-heating engines.

To simulate different temperature conditions during the seasonal changes and the effect caused by the Webasto heater, boundary conditions to the test engine were set at 40 degrees Fahrenheit and 75 degrees Fahrenheit during separate test runs.

Emissions testing using an AC transient engine dynamometer, was performed to determine the effect of engine start-up temperature on PM, HC and CO emissions on a 2005 DT466 engine using an FTP Transient cycle with a Webasto Thermo Top C 5 Kw coolant heater (Part Number 923369). Emissions data shows that the start-up temperature has a significant effect on the engine emissions and overall performance of DPFs.

Results Summary:
Engine start-up temperature has a significant impact on the emissions levels emitted by the engine.*
PM emissions were reduced by 66 percent by pre-heating the engine during the cold weather conditions. Pre-heating also provided a 27 percent reduction in PM emissions during normal ambient conditions. This will help in longevity of the DPF life and can avoid more frequent regenerations and cleaning intervals.*

NOx emissions were reduced by around 40 percent by pre-heating the engine to 155 degrees Fahrenheit.*
The test results shows a 29 percent reduction in CO during winter conditions, and a 62 percent reduction during normal ambient conditions.*
Pre-heating the engine does not have a significant effect on the Hydrocarbon emissions.*

About Webasto
Webasto Thermo & Comfort North America is a subsidiary of Webasto Thermo & Comfort SE. Webasto Group is based in Stockdorf near Munich and has been a family-owned business ever since the company was founded in 1901. The group has more than 50 international locations, including more than 30 production plants, and is active in the segments of roof and thermo systems. Webasto is one of the top 100 automotive suppliers worldwide. More information at www.webasto.com.

Category: Engines & Drivetrains, Featured, General Update