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Old 1 Week Ago   #31
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Re: where does the heat come from in electric cars?

Quote Originally Posted by portland_bill View Post
No heated screen in the Fabia, and does not take long to put warm air up for demist.
Modern emissions standards favour cars that heat up quickly so you tend to find the small turbo petrols do.

It's been a while since I've looked but if I remember right you were allowed a "thermal window" of time during cold running where emissions can be higher to stop catalyst damage.

Many diesels took the mick on this as part of dieselgate, it was effectively the legal version of what VW did. As a result it got a lot more tightly controlled. The original intention of the thermal window was to protect emissions gear in cold running...one manufacturer had set it to classify 17 Celsius as cold running, so in the UK that car would have no emissions controls 11 months of the year.
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Old 1 Week Ago   #32
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Re: where does the heat come from in electric cars?

The Konisegg Freevalve engine created for general production (but ignored by the industry) was set so that one exhaust valve fed the turbo and the other bypassed it. No waste gate needed. On cold start the ignition is retarded and turbo is given no exhaust gas. The delayed spark throws flames down the exhaust which rapidly heat the catalyst.
The valves are all under electronic control with solenoids controlling the valves. There is no mechanical camshaft saving considerable weight and cost.
The engine efficiency make diesels unnecessary and manufacturing costs are considerably less. Who knows why the car makers have ignored them.
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Old 1 Week Ago   #33
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Quote Originally Posted by DaveMcT View Post
The Konisegg Freevalve engine created for general production (but ignored by the industry) was set so that one exhaust valve fed the turbo and the other bypassed it. No waste gate needed. On cold start the ignition is retarded and turbo is given no exhaust gas. The delayed spark throws flames down the exhaust which rapidly heat the catalyst.
The valves are all under electronic control with solenoids controlling the valves. There is no mechanical camshaft saving considerable weight and cost.
The engine efficiency make diesels unnecessary and manufacturing costs are considerably less. Who knows why the car makers have ignored them.
cost and reliability almost certainly
I'd it was as good as it's supposed to be and they could make it work they would I'm sure
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Old 1 Week Ago   #34
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Re: where does the heat come from in electric cars?

Quote Originally Posted by chris3234 View Post
cost and reliability almost certainly
I'd it was as good as it's supposed to be and they could make it work they would I'm sure
The whole point was considerably lower cost. It uses normal valves but removes the belt, cams, tappets, etc. and add many other benefits. I suspect the real problem is what will ultimately kill Big Auto. They don't like change so stuff gets ignored until it's too late.
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