Turtle n Peeps wrote:
As far as carbon problems. Yes, that was a problem. It costs tens of millions of dollars to revamp a fuel system and Ford did just that with the Ecoboost. They are not in the business of losing money so the problem was big enough to cause Ford spend a lot of money to now have a duel injection system on there Ecoboost.
I say good for them. They fixed it the correct way instead of bandaiding it up.
They didn't add port injection to fix some non existent carbon issue. They added it to meet upcoming particulate emissions, better efficiency, and power.
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The addition of a port fuel-injection system to the direct rails improves cold-start emissions and low-load consumption. When the DI isn’t needed, the camshaft-driven high-pressure fuel pump shuts down to reduce parasitic loss."
Deep Dive: 2017 Ford F-150 Gets New(-ish) 3.5-liter Twin-Turbo V-6, (Totally) New 10-Speed Automatic"
The single most significant change to the engine is a new dual fuel system that now includes both port and direct injection. Since the beginning, direct injection (DI) and turbocharging have been the defining characteristics of EcoBoost engines. DI enables the use of higher boost and compression ratios that improve torque and driveability by cooling down the compressed air that the turbos push into the cylinders. They also enable greater fuel delivery precision for better fuel economy and emissions in most conditions. However, at higher flow rates the need for larger holes in the injectors detracts from the flow control resolution.
Gasoline DI engines are also prone to produce higher levels of particulate emissions, especially following a cold start when the fuel is sprayed on cold cylinder walls. The new Tier III emissions regulations that go into effect in 2018 significantly reduce the amount of particulates that all engines are allowed to emit. Al Cockerill, Ford engine systems supervisor for the 3.5-liter engine acknowledges that the addition of port injection will enable this new engine to meet Tier III emissions standards without resorting to a particulate filter of the type that is required on modern diesel engines."
Ford Refreshes Its Original EcoBoost V6 And Makes The Jump To 10 Speeds For 2017 F-150 And Raptor"
The second-generation mill will probably be marginally cleaner and more efficient than its predecessor, thanks in part to a dual injection system that will switch between port injection for better emissions and direct injection for maximum power and fuel economy, depending on engine load."
Official: Second-Generation Ford EcoBoost Makes 375 hp and 470 lb-ft in F-150
