Why don’t they make hybird steam-gas engines?

David S questioned:

BMW is effective on steam-gas hybrid engine and Ford must be too. It may be able to capture up to 80% of waste heat and boost fuel efficiency. The gas engine block and exhaust waste heat it is used to generate steam. The engine block is in continuous 100 C fill up at full like for optimum mechanical top. The exhaust heats up the mist to boost the pressure and efficiency. For an all mechanical motor logic it will have low driving potential until the steam heats up.

An gripping motor car would start of at full potential. The battery size does not have to be too generous in view of the fact that it only wants ample to handbook 10-15 summary until the steam heats up. Then it generates bounty of electricity to handbook a long interval.

When a self fills up with gas they also fill up with fill up. It would be designed to have ample fill up and gas so that they are consumed at about the same rate.