Diesel Tundra or Tacoma?

* Disclaimer: I didn't write this

https://www.tfltruck.com/2020/07/di...gest-a-high-compression-gas-or-diesel-engine/

This patent may be for a high compression gas or diesel engine
Initially filed on December 2019, U.S. patent (US20200208601) was made public on July 2nd, 2020. The patent indicates that Toyota is developing an engine that uses high compression for enhanced performance and reduced emissions. We don’t know if it’s a gas or diesel engine.

Toyota engine patent document.
I’ll try to avoid going through the minutia of how high compression work. It’s easiest to say that more power is exacted by the engine with minimum use of fuel. More force is exerted on the piston, which is higher on the compression stroke than normal. This creates additional push on the expansion stroke, creating more power without burning additional fuel.


This technology is not new, diesels have used it for years and gas engines now use it often. In addition to the extra power (which means less fuel usage for power, thus less consumption) the system burns very clean.

“Smoke?”
In the patent, one of the notations states that the process they are creating will mitigate smoke. We believe that is a reference to exhaust gases. Now, that’s what caught our attention. This is where it could mean a diesel engine, which is intriguing.

First of all, Toyota already builds high compression gas engines. The Dynamic Force Engines used in a variety of four-cylinder vehicles. It has a proven track record for power and efficiency. They, along with Mazda and other automakers, have proven the benefits of high compression over the long run.

Is this a diesel engine?
Having a high compression diesel engine that can burn off excess “smoke” would be a boon to any vehicle. Imagine, not having to use DEF to convert NOx to nitrogen and water? There have been some systems in the past that used a variety of other methods (including ultra high heat) to combat NOx – but this could be a game changer.

Right now, nearly every 1/2 ton truck sold in the United States has a six-cylinder diesel variant. Not counting Nissan, the rest build a version of a 3.0-liter diesel that tends to be much more efficient than the gas equivalent. There are some drawbacks, including DEF, additional weight and pricing issues. By building a lighter, more efficient diesel engine, some of those issues can be addressed. A diesel that doesn’t need additional (costly) plumbing for its exhaust system.

This is all based on conjecture, but it is intriguing to think about the possible applications of such a power-plant. What do you think? Would you buy a diesel Toyota Tundra, or even a diesel Toyota Tacoma?

And GO!

 

I would buy a Tundra with one if it also came with more payload?

 

x2.

 

Without reading ALL the hypertechno-legalese, this is a patent for a DIESEL engine. Self-ignition = Diesel cycle.

This patent is for an improved fuel spray distribution device that somehow adjusts fuel heating (glow plug function?) and improves distribution of fuel spray in the combustion chamber. It appears to also use the ECU in closed loop control. That is probably just for fuel heating function on start-up to provide easier diesel starting and/or automatic "glow plug" operation.

Diesel?...I've had one, and I can't see myself ever owning another.

 

I grew up on a ranch/farm with diesel trucks, tractors, combines etc. Even my mom's Mercedes was a diesel. It's in my blood, so I would buy a diesel as soon as it is available. The only reason I don't have a diesel yet is because I don't trust the available options' reliability. Toyota builds awesome diesels elsewhere in the world, so I know they can get it right.

 

It's a HCCI motor https://www.youtube.com/watch?v=9nCr3h0-eV8

 

You may be right. I just read a little about HCCI on the internet. Combustion has to be controlled to a narrow band to prevent auto-ignition or excessive emissions. One of the ways is by control the temperature of the intake charge, which would explain the ECU control. Interesting.

 

If a Tundra came out with a Diesel engine (no DPF, DEF, etc.) I’d be all in.