Following the announcement of the BMW M4 with water injectionWe made some patent searches at BMW

We have found (for the moment) 2 patents filed by the manufacturer on water injection, one of the 2 of which provides interesting information, in particular on the management of water injection in relation to the load as shown in this diagram (for explanations and legend, click on the image):

The injection of this patent is made by 2 injection depending on the load: direct injection into the cylinders and / or indirect injection into the intake duct.

Learn more: Read the text of the patent, comments and analysis on BMW water injection patents

Other patents are certainly available… the research continues!