What Toyota engines have direct injection?
Toyota introduced this technology, which it calls D-4S injection, on a V-6 more than a decade ago and now uses port and direct injection on its 2.0-liter flat-four (which is built by Subaru), 3.5-liter V-6, and 5.0-liter V-8.
When did Toyota start using direct injection?
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.
Which is better port injection or direct injection?
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.
How long do direct injection engines last?
While GDi vehicles will require a service, typically between 20 to 40,000 miles, regular maintenance in between will help prevent the accumulation of carbon: Change oil according to the manufacturer’s recommended change intervals and using the specified oil for optimal performance of the intake valves.
Is ethanol bad for direct injection engines?
Ethanol is known to speed up the corrosion rate of some metals that are used in an engine. With the higher pressure of a direct injection engine, and thanks to the fuel injector being exposed to in-cylinder explosions, there’s a higher chance of a problem or failure.”
What is the most common disadvantage of direct injection?
The biggest drawback of direct fuel injection is DI can lead to clogged fuel systems and engine carbon fill up.
What is the problem with GDI engines?
GDI problems Many people have complained to the National Highway Traffic Safety Administration that their GDI-powered cars experience high rates of fuel system clogging and engine carbon buildup. The results can be drastic, with some drivers experiencing loss of power and engine stalling.
Why does Toyota use port and direct fuel injection?
Toyota uses its blended approach of port and direct fuel injection to give the best possible performance, emissions and economy. It is difficult to say when the port, direct or both injectors are active because it depends on many variables like throttle position, load, engine speed and even engine temperature.
What kind of injection system does Toyota use?
Other manufacturers, including Audi and even Ford, are adopting the Toyota D-4S dual-injection system. As the costs of the components decrease, look for these types of systems on even more engine applications. Listen to the latest Import Car podcast.
Where is the fuel injected in a Toyota D-4?
Immediately after a cold engine start and during the exhaust stroke, fuel is injected into the intake port from the fuel injector assembly (for port injection). Fuel is also injected from the direct fuel injector near the end of the compression stroke.
Are there any problems with a direct injection engine?
This means that a low oil level or lack of oil changes can cause problems, but this is true for any engine. The one problem area specific to direct injection is a carbon buildup on the back of intake valves and on the injectors. Why does this happen? In any engine, oil vapors from a crankcase ventilation system flow through the intake valves.