Question 1: Have You Done Testing In My Application?
Temperature plays a big role in the way aftertreatment systems reduce emissions. To burn off particulate matter, DPFs require temperatures inside the engine to reach a certain level — a challenge in very cold or high-altitude conditions. Temperatures can’t get too hot either, or cracking and failure may result. It’s a delicate balance, and that’s why validation is so important.
Every manufacturer tests products differently, so check that your application’s been covered. Here’s what we do at Caterpillar: All industrial engines are subjected to extensive in-the-field testing in everyday and extreme conditions. Each January and February, we send machines to the Arctic Circle to run at -32°C, as well as to Colorado, where they operate in a cold-temp, high-altitude environment. We also test engines in the dry summer heat of the Arizona desert, where temperatures routinely exceed 40°C, and inside cold chambers where temperatures drop to -50°C.