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Lozzyf

Hybrid towing 1500cwt caravan?

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1 hour ago, AJGalaxy2012 said:

 

Surely if it was like the Outlander 20 to 30 miles range a diesel engine would be a good fit? The engine would run at high load for 20 minutes or so which should get the DPF upto temperature and provide optimum conditions for a regen, CATS would be warmed up too. Engine could be optimised for constant speed running with low emissions. With the engine under relatively constant load it should be fairly straight forward to minimise pollution by getting it really efficient. Once the battery was back to 80% or more the engine could then shut down again and the cycle continue. The system could be spec'd so that at say a constant 70mph the engine was enabled to provide the power needed to sustain the relative high speed, the batteries fully charged ready for when it leaves the motorway.

 

 

 

But you could still be in town when you ask that diesel to run under load and you'd need to have it decoupled from the drive train to charge the batts at optimum rpm/load. 

It's just trying to invent something that no one would buy. Would you want to be sat at the lights while a diesel engine is churning away at 2500rpm.  I doubt the Nox police would like that either.

 

 

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1 hour ago, AJGalaxy2012 said:

 

Surely if it was like the Outlander 20 to 30 miles range a diesel engine would be a good fit? The engine would run at high load for 20 minutes or so which should get the DPF upto temperature and provide optimum conditions for a regen, CATS would be warmed up too. Engine could be optimised for constant speed running with low emissions. With the engine under relatively constant load it should be fairly straight forward to minimise pollution by getting it really efficient. Once the battery was back to 80% or more the engine could then shut down again and the cycle continue. The system could be spec'd so that at say a constant 70mph the engine was enabled to provide the power needed to sustain the relative high speed, the batteries fully charged ready for when it leaves the motorway.

https://www.amazon.co.uk/gp/product/B071D8SYXN/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1

 

Cheer for that:Thankyou:

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5 minutes ago, logiclee said:

 

But you could still be in town when you ask that diesel to run under load and you'd need to have it decoupled from the drive train to charge the batts at optimum rpm/load. 

It's just trying to invent something that no one would buy. Would you want to be sat at the lights while a diesel engine is churning away at 2500rpm.  I doubt the Nox police would like that either.

 

 

As per my other post Mercedes, Vauxhall and Citroen have zero Nox diesels. The system would be running on batteries in town.

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8 hours ago, AJGalaxy2012 said:

Why is that? I would have thought the ability to run at a high load for a reasonable length of time would have made that quite a simple installation.


When the vehicle is running primarily on electric power and the diesel is only charging, but not providing any or much propulsion, the diesel will only be running at relatively light load, a condition that is not encountered so very much with a pure diesel. Emissions control must be specific to take this into account.

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4 minutes ago, Lutz said:


When the vehicle is running primarily on electric power and the diesel is only charging, but not providing any or much propulsion, the diesel will only be running at relatively light load, a condition that is not encountered so very much with a pure diesel. Emissions control must be specific to take this into account.

But the diesel can run at rated power for a shorter time if the generator is sized for that.

Edited by kelper
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23 minutes ago, kelper said:

But the diesel can run at rated power for a shorter time if the generator is sized for that.

 

Motor generator systems have been tried before but few reviewers liked them and even fewer buyers bought them. So we are left with a the likes of BMW i3 range extenders.

If you are thinking a diesel able to drive and generate and also an electric motor with battery for decent range the packaging, weight and cost becomes a real issue.

And most importantly there's little demand for manufactures to develop it. 

 

Our transition will be.

Ice>Mild hybrid>Hybrid>Phev>BEV.

 

The manufacturers have their development programs well mapped out. It's just a matter of where and when you jump to which technology, 

And I'm not aware of any significant investment in diesel PHEV.

Edited by logiclee

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23 minutes ago, Lutz said:


When the vehicle is running primarily on electric power and the diesel is only charging, but not providing any or much propulsion, the diesel will only be running at relatively light load, a condition that is not encountered so very much with a pure diesel. Emissions control must be specific to take this into account.

How do you make that assumption? if the diesel engine is sized accordingly, you could have a 100Kw engine with a 75Kw generator that is providing power to the motors and charging the batteries, it would be running at 75% load.

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2 minutes ago, AJGalaxy2012 said:

How do you make that assumption? if the diesel engine is sized accordingly, you could have a 100Kw engine with a 75Kw generator that is providing power to the motors and charging the batteries, it would be running at 75% load.

 

It's been looked at, tried and tested. It's not efficient and wouldn't sell.

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Do any cars have an engine that is mechanically AND electrically connected to the driving wheels?

 

Has anyone driven the new Mazdas with the compression ignition petrol engines?

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31 minutes ago, kelper said:

Do any cars have an engine that is mechanically AND electrically connected to the driving wheels?

 

 

 

A formula 1 style MGUH could work if they could make it reliable and affordable for road use but we are someway off that for big enough outputs.

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45 minutes ago, kelper said:

Do any cars have an engine that is mechanically AND electrically connected to the driving wheels?

 

Has anyone driven the new Mazdas with the compression ignition petrol engines?

Outlander PHEV can work in 3 modes, Electric driving the wheels, engine driving the generator the power supplied to the batteries and the motors which drive the wheels and engine driving the wheels and the generator with the motors also driving the wheels. Known as Electric, Series Hybrid and Parallel hybrid respectively.

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1 hour ago, kelper said:

Do any cars have an engine that is mechanically AND electrically connected to the driving wheels?

 

Has anyone driven the new Mazdas with the compression ignition petrol engines?

 

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