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The mkiv Supra Owners Club

Diesel cars wtf is going on?


The Raven

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Look for Auto Express online, a couple of weeks back they did an interview with all the major manufacturers on the future of diesel,most thought there would still be a place for it but only in bigger engines.It seems new euro regs on emissions will require expensive development to make diesel viable in small engines.

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It was inevitable.

Diesels are dirty, shit bust.

Always have been always will be.

 

The encouragement for diesels was all designed to boost car sales.

It should never have happened in the first place.

 

The cost of diesel at the pumps have been subsidised for far too long with the cost added to petrol.

 

 

 

 

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Its just typical public scaremongering, the hype takes over then threads like this appear.

 

And re subsidised diesel costs, back in the day diesel was considerably less than petrol, its a byproduct of the petrol process. Since its popularity rocketed the government and companies maxed their profits.

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That's only because diesel was taxed at a different rate than petrol.

 

Diesel isn't a by product of the petrol process.

Both diesel and petrol are byproducts of the crude oil.

 

Modern diesel is also extremely different to how it was several decades ago.

 

And Diesel engine R&D were heavily subsidised by governments in the 90's.

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Do share please :)

 

The problem with electric cars using batteries is A) the cost of batteries B) the charge in the batteries and C) recharging the batteries.

It's just not economical.

 

My plan is to use a generator to provide power to the electric motors.

 

That way only limiting factor is fuel.

Since a good 2kva will last 24 hrs on 3.5 litres continuous use, you should get thousands of miles out of a tank :)

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The problem with electric cars using batteries is A) the cost of batteries B) the charge in the batteries and C) recharging the batteries.

It's just not economical.

 

My plan is to use a generator to provide power to the electric motors.

 

That way only limiting factor is fuel.

Since a good 2kva will last 24 hrs on 3.5 litres continuous use, you should get thousands of miles out of a tank :)

 

This is what the industry calls a "series hybrid".

 

Unfortunately you can't ditch batteries. You will need something to act as a current buffer for the periods when your gen-set is producing more power then you want (i.e. when cruising) and also to act as a temporary current source when it is producing less current then you need (for rapid accelerations). A series hybrid only works if you can run the small gen set at an optimum economical set point, which will be far below the maximum requirements of the vehicle and way above the minimum requirements (although your 2kVa example is probably too small to work). If you somehow plan to modulate the gen set itself to increase or reduce power as and when you need it then you will end up with something less efficient then the normal engine as you will need a gen set as big as the 2JZ for peak performance, with the efficiency losses in between the engine, motor and generator.

 

If by 2kva you mean the output of the proposed gen set, 2kva = 2kW. The bog stock 2JZ as a peak output of 206kW, so you're not really comparing apples with apples. :) If you really plan to sun a 2kVA gen set then you will need some hefty batteries to store enough energy for when you want to go above 30 mph for a few minutes :)

 

To put things in perspective, the Chevy Volt, which reverts to operating as a series hybrid when its EV range has been exceeded uses a 63kW engine driving an (up to) 111kW primary motor-generator or a secondary 55kW motor-generator, coupled with a 18.4kWh worth of batteries and has a 420 mile total range (not "electric" range).

 

The BMW i3 Rex uses a far smaller gasoline engine (25kW) and a similar sized motor-generator (125kW) and 22 or 33kWh battery packs, and has a total range of just 180 miles.

 

Obviously, as you pint out, total range depends on the size of the fuel tank tank. You might be able to get "thousands of miles" out of a 2kW generator using the Supra's big fuel tank, but without batteries you will be doing it all at walking pace :)

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