Toyota are ceasing the V8s and using V6s soon.


Quote:

...........   The V35A-FTS is a 3.5-liter twin-turbocharged V6 gasoline engine debuted in 2017 with the fifth-generation Lexus LS 500. This new member of Toyota's Dynamic Force engine family is the first turbocharged V-engine in Toyota's history. In the near future, the manufacturer will stop using all V8 engines (1UR-FE, 3UR-FE) in Toyota and Lexus vehicles, and this 3.5-liter twin-turbo V6 will replace them. The new engine is not only full of technical solutions similar to the already well-known inline-4 A25A and M20Ab engine but also made several steps forward. The engine achieves 37% thermal efficiency. .......... ....................  The head design utilizes laser-sprayed intake valve seats instead of traditional press-fitted ones. Intake channels are almost straight, and the exhaust manifold is integrated into the cylinder head. Like other modern engines, the integrated exhaust manifold is also water-cooled to help shorten engine warm-up times to reduce emissions. For each cylinder, there are two intake and two exhaust valves (sodium-cooled).       ............. ...........  Each cylinder head has its own high-pressure fuel pump driven by an additional lobe on each exhaust camshaft. Depending on engine needs, those pumps provide fuel pressure in the range of 2.4-20 MPa inside the forged steel high-pressure fuel rails used for the direct injectors        ................. .........   Each turbocharger sends compressed air through its own air-to-water intercooler integrated inside a polymer intake air surge tank mounted on top of the engine. Intercoolers and turbochargers use a separate cooling system with an additional radiator and electric pump.             .......

https://www.motorreviewer.com/engine.php?engine_id=192

Efficiency is very good.
I'm not too keen on turbos, esp petrol turbos.
I like the laser sprayed valve seats, they have done it for a while now.
Sodium cooled exhaust valves??
High pressure fuel pump - I would prefer not, but that is how they get 37% efficiency.
Turbos are intercooled with separate radiator and pump .

It's tragic the Toyota is also going down the

Over engineered
Overly complex
Built-in redundancy

Rolling pile of technological garbage

Rabbit hole

Don't think aqua ever quite got over when they ditched the horse and cart

I have worked with turbocharged heavy duty mining equipment for the last 30 years.
These machines are punished, really punished, by the operators for 24 hours a day in environments that even the most hardy 4x4 enthusiast woukd shy away from.

They do break down, very occasionally, but on the whole are remarkably resilient.

Properly set up, adjusted and maintained, turbo are just as reliable as any engine.
With the advantage of being smaller for the same output.

Valkie wrote on Aug 16^th, 2021 at 1:32pm:

I have worked with turbocharged heavy duty mining equipment for the last 30 years. These machines are punished, really punished, by the operators for 24 hours a day in environments that even the most hardy 4x4 enthusiast woukd shy away from. They do break down, very occasionally, but on the whole are remarkably resilient. Properly set up, adjusted and maintained, turbo are just as reliable as any engine. With the advantage of being smaller for the same output.

thanks, yes, turbo diesels run all prime movers and buses