This hybrid would improve cold starts.
Here is a simple mechanical hybrid.
Lots of room for my hybrid system that’ll make battery-electric hybrid-vehicle owners jealous. My plan is to have the diesel engine double as a steam generator. This way, my engine won’t be wasting more power than it uses. I still need to convince Cyclone Power Technologies to give me a waste heat steam engine. Then I’ll mount it in the bed, run it constantly, and have it power all my accessories and a hydraulic pump. I’ll install a Dana 60 front axle with a hydraulic pump connected to the differential. This will allow me to shut off my diesel engine (in the city) and only use it when needed (on the highway). When I’m in town I’ll just be trickle-charging my hydraulic accumulator with the steam engine and driving only with the front wheels.