CNG trucks are popular because they are economical to run and are cleaner than most diesels. However, they present two main challenges. First, the CNG engine does not have the same power as the corresponding diesel one. Therefore, the hydraulic system can easily stall the engine while operating at idle or can limit the truck acceleration, thus affecting the productivity. Parker systems engineers can help develop hydraulic systems and electronic controls that read the engine status and prevent the stall at idle or the de-rating of the truck acceleration.