Nissan 50% TE engine concept

[Brake Horse Power]

Where Volvo announced to completely ban ICE by 2030, Nissan sees opportunities for high efficient combustion engines. They currently have a 46% TE engine, and have a small roadmap to achieve 50%. They focussed on airflow in the cylinder and lean burn. I didn’t notice any pre-combustion chambers in the presentation.

[NL_Fer]

50% TE but how much is lost in that serial hybrid driveline?

[manzieza]

It Great !

[lucafo]

Please, share the link


Sent from my iPhone using Tapatalk

[gruntguru]

50% TE but how much is lost in that serial hybrid driveline?

The loss due to the serial drivetrain is more than offset by the gain from operating the engine constantly at its peak efficiency point. They are also able to increase peak efficiency at the design stage since efficiency at other operating points becomes less important.

[Tommy Cookers]

50% TE but how much is lost in that serial hybrid driveline?

no more than that lost in any other driveline that has a continuous relationship between motor and load ?

[vorticism]

just combine the electrical machine efficiency losses. Maybe 2% loss for generator, same for motor. 96% efficient driveline. Less than a driveshaft and gear, but maybe on par with other types of CVT. Next question is, would it be better to use batteries, capacitors, or a flywheel for the buffer storage.

It's an appealing concept but requires two equally sized MGUs and their controllers. In a performance application, it will be hard to beat a gearbox, for weight.

[Zynerji]

just combine the electrical machine efficiency losses. Maybe 2% loss for generator, same for motor. 96% efficient driveline. Less than a driveshaft and gear, but maybe on par with other types of CVT. Next question is, would it be better to use batteries, capacitors, or a flywheel for the buffer storage.

It's an appealing concept but requires two equally sized MGUs and their controllers. In a performance application, it will be hard to beat a gearbox, for weight.

I like twin, counter rotating flywheels under the rear floor... To prevent porpoising!

[vorticism]

just combine the electrical machine efficiency losses. Maybe 2% loss for generator, same for motor. 96% efficient driveline. Less than a driveshaft and gear, but maybe on par with other types of CVT. Next question is, would it be better to use batteries, capacitors, or a flywheel for the buffer storage.

It's an appealing concept but requires two equally sized MGUs and their controllers. In a performance application, it will be hard to beat a gearbox, for weight.

I like twin, counter rotating flywheels under the rear floor... To prevent porpoising!

To think Audi and Porsche were using them not long ago. No longer though.

The MGUH can rotate at 100k+ rpm, it should be ideal for flywheel storage. Edit: depends on inertial forces, although similar bearing and motor tech could be transferred.

[Zynerji]

just combine the electrical machine efficiency losses. Maybe 2% loss for generator, same for motor. 96% efficient driveline. Less than a driveshaft and gear, but maybe on par with other types of CVT. Next question is, would it be better to use batteries, capacitors, or a flywheel for the buffer storage.

It's an appealing concept but requires two equally sized MGUs and their controllers. In a performance application, it will be hard to beat a gearbox, for weight.

I like twin, counter rotating flywheels under the rear floor... To prevent porpoising!

To think Audi and Porsche were using them not long ago. No longer though.

The MGUH can rotate at 100k+ rpm, it should be ideal for flywheel storage.

MLC flywheels like the Williams original has nothing to do with current MGUH tech. The RPMs being similar is about the only congruence.

[vorticism]

True. The Audi LMP and Porsche GT examples were electrical though. Now that you mention it perhaps Williams flybrid (?) tech could be combined with a turbocharger to make an analog MGUH.

[Zynerji]

True. The Audi LMP and Porsche GT examples were electrical though. Now that you mention it perhaps Williams flybrid (?) tech could be combined with a turbocharger to make an analog MGUH.

I think the vacuum chamber is tough to integrate into a turbo tho.

[vorticism]

I think the vacuum chamber is tough to integrate into a turbo tho.

Def keep the compressor out of the vacuum chamber.

[NL_Fer]

Maybe driveline losses are not such a problem on busy or hilly Asian traffic, compared to an automatic transmission