What is D-4S injection?

You may soon see a Toyota vehicle that has both direct fuel injection and port fuel injection. Toyota calls this system the D-4S or Dynamic Force Engine (the “S” stands for superior) and the earliest application was on the Lexus GS SUV with the V8.

Does direct injection increase HP?

Direct injection technology provides slightly more power and better fuel economy; depending on the application, it’s usually in the 10–15 per cent range of improvement. But engine torque delivery can be bumped by as much as 50 per cent.

What is D4 direct injection?

In the D4 engine, fuel is injected under very high pressure into the combustion chamber itself (direct injection). During the combustion process, air is compressed and at a very precise moment fuel is injected directly into the combustion chamber.

What is Toyota D4-S?

Engines equipped with D4-S combine direct and port type fuel injection that achieve better fuel efficiency, increased engine output and reduced emissions. The Toyota D4-S Injection system has many benefits that contribute to a greener and cleaner environment.

What cars have direct and port injection?

Examples include:

• Redesigned Ford 3.5L EcoBoost and V6 engines.
• Lexus 2GR-FSE engines.
• Audi’s VW Group 3.0-liter V-6 and 5.2-liter V-10 engines.
• Toyota’s 2.0-liter in-line four-cylinder engines built by Subaru, and D4-S 3.5-liter V6 and 5.0-liter V-8 engines.

What are the pros and cons of direct fuel injection?

In general, GDI has higher efficiency, better fuel economy, lower emissions. The disadvantage would be some carbon build up, and slightly higher Particulate Matter emission than PFI.

Is direct injection good?

Port injection provides a better, more stable air/fuel mixture at lower engine speeds, which results in smoother operation upon startup. At higher rpm, direct injection provides a greater cooling effect, allowing for more power and less chance of knock.

What cars are still port injection?

Is the Toyota D-4S dual injection system good?

Other manufacturers including Audi and even Ford are adopting the Toyota D-4S dual-injection system. The system offers the best of both worlds while avoiding carbon buildup on the intake valves. And, as the costs of the components decrease, look for these types of systems on more engine applications.

How does direct fuel injection work on a Toyota D-4?

The D-4S system is not a “cold start” or “dousing” injector system, like that on V6 engines from the early to late 2000s. The direct fuel injectors are just like any other direct fuel injection system. And, the port fuel injectors are not there to clean the intake valves; these injectors work to provide fuel to the engine.

What kind of direct injection system does Toyota use?

The cylinder head has been designed with a high-efficiency intake port. A high-power ignition coil is used to burn every last droplet of gas from the multi-hole direct injector. This engine uses a new version of Toyota’s D-4S direct injection system, which has already been used on the Toyota 86 and Subaru BRZ twins for years.

When did the Toyota D-4S come out?

It started with the Lexus on the GS models in 2007. In 2012, the Toyota/Scion FR-S F86 received the D-4S. The Highlander and Tacoma also received the D-4S systems in 2015 as an option. The latest vehicle to get it is the four cylinder used in the 2017 Camry.