This patent can relate to a gas or diesel engine with high compression
Originally filed in December 2019, the US patent (US20200208601) was released on July 2, 2020. The patent indicates that Toyota is developing an engine that uses high compression for improved performance and reduced emissions. We do not know if it is a gasoline or diesel engine.
I will try to avoid going through the thoroughness of how high compression works. It’s easier to say that the engine requires more power with minimal fuel consumption. More force is exerted on the piston, which is higher on the compression stroke than normal. This creates additional thrust on the expansion stroke, creating more power without burning additional fuel.
This technology is not new, diesel engines have used it for years and gas engines now use it often. In addition to the extra power (which means less fuel consumption for energy, therefore less consumption), the system burns very clean.
In the patent, one of the notations indicates that the process they create will mitigate smoke. We believe this is a reference to exhaust gases. This is what caught our attention. That’s where it could mean a diesel engine, which is intriguing.
First of all, Toyota is already building high compression gas engines. Dynamic Force engines used in a variety of four-cylinder vehicles. It has proven itself in terms of power and efficiency. Together with Mazda and other car manufacturers, they have proven the benefits of long-term high compression.
Is it a diesel engine?
Having a high compression diesel engine that can burn excess “smoke” would be a boon for 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 control NOx – but that could be a game-changer.
Currently, almost all 1/2 ton trucks sold in the United States have a six-cylinder diesel variant. Besides Nissan, the others build a version of a 3.0-liter diesel that tends to be much more efficient than the gasoline equivalent. There are a few drawbacks, including DEF, additional weight and price issues. By building a lighter and more efficient diesel engine, some of these problems can be resolved. A diesel that does not need additional (expensive) plumbing for its exhaust system.
All this is based on guesswork, but it is interesting to think of the possible applications of such a power plant. What do you think? Would you buy a Toyota Tundra diesel, or even a Toyota Tacoma diesel?