Maybe I'm wrong,but weren't they only a short series of prototypes?I know that Germans had made a small amount of tank diesel engines ,but they were never been used at battlemachines.Writting about tank diesel engines I was thinking about typical product ,not about "trying" models,even they were used at battlefields.Of course I can be wrong about US tanks,but I'm sure that Germans were unable to build a good tank diesel engine for normal production.About US Sherman I've read something strange some time ago,author wrote that first model of Sherman was powered by 5 (five) car engines connected together,I think it wasn't a battle model,rather a "trying" one,I couldn't even imagine how to coordinate the work of five small engines at one tank!Maybe the same situation was with that models You've written about,but I agree I could made a mistake writting that:" only Russians and Poles were making tank diesel engines at WW II".
