I have a question about the currently available hybrid vehicles which I
have been wondering about for a while.
It seems that all the hybrid vehicles currently available have an
electric motor connected in varying configurations with a petrol
(gasoline) engine. My question is, why not a Diesel engine? Given that
the aim of a hybrid vehicle is to increase fuel economy, it would seem
sensible to choose the most economical internal combustion engine
available, however it seems that _none_ of them do - there must be a
reason for this, but this reason escapes me.
Is it that hybrid vehicles are primarily marketed in the USA, where use
of Diesel fuel is not widely accepted for private cars?
(European-marketed hybrids are all petrol not diesel too though).
Or is it because of the lower power-to-weight ratio, which is already a
limitation with heavy batteries?
Or maybe because Diesel engines are more expensive, and having a Diesel
hybrid would be too expensive on capital outlay to be acceptable to the
consumer (despite what should be excellent running costs)?
Does anyone know the answer, or have any insight (!) into this?
Regards,
Donald
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