What MPG and Range can we expect on the Bronco Sport?

[kshaw]

Mine seems stuck at 22.2 MPG. That's with the 3-cylinder 1.5

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[NickAtNight]

Agreed. Ethanol also has increased corrosion issues. I had trouble finding any articles for gas without 10% ethanol (and it is hard to find at the pump. Where I have found it they want a much higher price !)

Ethanol is far higher octane than gasoline, but it has far less energy content. All other things being equal, more Ethanol means fewer miles per gallon.

 

[NickAtNight]

...The problem is we haven't figured out how to change internal combustion gasoline engine compression ratio on the fly just yet.

Rethink that statement. They have installed a knock sensor on the engines.

When the the sensor senses knocking (detonation of the fuel from compression and not from the spark) it is adjusting the operating parameters on-the-fly to eliminate the knocking (because it can damage our engine).

I think the adjustment is only one way. So if the fuel is good and gets better, there is no adjustment. Just when the fuel is good and gets worse.

 

[NickAtNight]

I've never measured it myself, but most references online suggest highway cruising requires on the order of 50 hp--a little more for faster speeds, a little less for slower speeds. The engine is literally loafing along at that power demand.

So how can we tell when we are running on TWO cylinders?

That is supposed to be the big feature of the Dragon. The engine can shut down one cylinder when loafing.

Cylinder Deactivation
The biggest innovation to the 1.5L EcoBoost engine is the cylinder deactivation.

During operation at partial load, the first engine cylinder can be deactivated hydraulically.

This reduces the fuel consumption and the emissions of the engine or vehicle.

If only minimal engine power is required, the system stops the gasoline injection and the valve actuation.

The connection between the camshaft and the intake and exhaust valves of the first cylinder is interrupted via a new camshaft module and a special rocker arm by means of engine oil pressure.

The PCM calculates the optimal time using the engine speed, throttle position, and load condition.

The intake and exhaust valves remain closed and enclose the mixture in the combustion chamber.

This should balance the forces acting on the cylinders by means of a kind of ‘spring effect’. The temperature within the deactivated combustion chamber is also maintained in this way, which increases the efficiency of the combustion when the cylinder is activated again. The activation and deactivation only take approximately 14 milliseconds. The system operates at engine speeds of up to 4,500 RPM. The friction and pump losses within the engine are reduced.

The fuel consumption and CO2 emissions decrease by up to 6%.

 

[RSH]

Cylinder deactivation occurs when coasting or cruising under light load conditions.

 

[Mark S.]

When the the sensor senses knocking (detonation of the fuel from compression and not from the spark) it is adjusting the operating parameters on-the-fly to eliminate the knocking (because it can damage our engine).

This is correct, but the parameters changed do not affect the engine's basic compression ratio--that's determined by ratio of cylinder volume with the piston at the top and bottom of its stroke. Changes to these respective volumes may be effected via changes to cylinder bore and piston stroke length, combustion chamber and/or piston shape, etc., but as mentioned, these are determined during engine design and production; they cannot be changed after the engine is running...yet. There have been some efforts of late to control engine compression ratio on the fly, but that feature is not in production yet (as far as I know).

Even if we had a way of changing compression ratio on the fly, I don't think it would be a good strategy for instantaneous reduction of detonation. Reducing/eliminating detonation for Ford's EcoBoost engines (like most of today's small-displacement turbocharged engines) is usually accomplished by retarding timing, decreasing boost pressure, enrichening the mixture, or a combination of all three. Retarding timing results in an instantaneous reduction of cylinder pressure (and a commensurate reduction in power) during combustion, which is the most effective means of rapid elimination of detonation. The other strategies are a means to decrease engine heat, which is the proximate cause of detonation. Once heat is under control, the powertrain control module (PCM) can begin to advance timing to regain some of the lost power. This strategy, BTW, occurs whether you are burn regular or premium fuel. The difference is the engine must get hotter before premium fuel experiences detonation, so the PCM can delay detonation mitigation intervention. This allows results in greater maximum horsepower.

 

[NickAtNight]

… is usually accomplished by retarding timing, decreasing boost pressure, enrichening the mixture, or a combination of all three.

Retarding timing results in an instantaneous reduction of cylinder pressure (and a commensurate reduction in power) during combustion, which is the most effective means of rapid elimination of detonation.

Thank you. That is a good explanation.

Where can we find the tuning maps for our car?

(Looks like the fancy tuners have them. But they usually give us the boosts that they are doing and not the base information.)

 

[NickAtNight]

Cylinder deactivation occurs when coasting or cruising under light load conditions.

Thank you.

Is there any indication on our displays when this mode (2-cylinder mode) is active?

 

[NickAtNight]

And is there any way to figure out what gear we are in?

wow. The technology is amazing!

Skip shift - so we may jump from 1-3-4 or 1-2-4

Adaptive Learning - shift points shift based on our behavior !

Gear Ratio - haven’t found this listed anywhere.

Shift point - haven’t found this listed anywhere either. Probably shifts with GOAT mode. Sport runs about 2,200 RPM versus regular of 1,500 RPM.

Ford Bronco Sport 8F35 Shift Programming

The Ford Bronco Sport’s 8F35 transmission uses a proprietary programming system, which is designed to optimize shifting patterns and adapt to various driving conditions. Here are some key points about shift programming in the 8F35 transmission:

1. Skip-Shift Technology: The 8F35 transmission employs skip-shift technology, which allows for automatic transitions between gears (e.g., 1-3-4 or 1-2-4) in certain driving scenarios. This feature helps improve fuel efficiency and reduces the need for manual shifting.
2. Non-Skip-Shift Mode: When the transmission is in manual mode (SelectShift paddles), it uses a non-skip-shift pattern, allowing for more precise control over gear shifts (1-2-3-4).
3. Gear Ratio and Shift Point: The 8F35 transmission’s gear ratios and shift points are programmed to optimize performance and fuel efficiency. For example, the transmission may shift into higher gears at lower engine speeds to reduce engine noise and improve fuel economy.
4. Adaptive Learning: The transmission control module (TCM) continuously learns and adapts to the driver’s behavior, adjusting shift points and patterns accordingly. This helps the transmission optimize its performance and responsiveness over time.
5. Resetting the Transmission: In some cases, resetting the TCM (transmission control module) can help resolve transmission issues by allowing the transmission to relearn its adaptive values. However, this procedure should only be performed by a qualified technician and may not resolve underlying mechanical problems.

Note: The Ford Bronco Sport does not offer a manual transmission option. The 8F35 transmission is an 8-speed automatic, and its shift programming is designed to provide a balance between performance, fuel efficiency, and driver convenience.

 

[strckerie]

This is the mpg my husband got this weekend with our 2021 BS BB on a 650 mi. round trip, all interstate driving at 70 mph normal mode. He is 6'4" and our son who went with him is 6'8", so 500 lbs+ passenger weight plus light luggage and cooler in the cargo area. They were tolerably comfortable, though if the big guys had their choice, a few inches more here and there in the BS and more adjustable seats would make them really happy.
Cheers!

 

[Mark S.]

Where can we find the tuning maps for our car?

I don't know. I would be surprised if these are published anywhere. Some tune vendors sell devices that can read, copy and write tune maps, but I don't know if you can see a map that you've copied.

 

[NickAtNight]

This is the mpg my husband got this weekend with our 2021 BS BB on a 650 mi. round trip, all interstate driving at 70 mph normal mode. H

Very Nice. That would be th4 2.0 L, 4-cylinder engine with an official 20/24 MPG rating.
- You got 33.4 MPG for 3/4 of an hour at 58 MPH.

 

[RSH]

Thank you.

Is there any indication on our displays when this mode (2-cylinder mode) is active?

It's designed to be transparent, on the other hand there have been a couple of incidents posted on this board where the deactivation solenoid stuck in deactivation mode and the symptoms were low power along with the wrench symbol in the dash display lighting up.

 

[NickAtNight]

I don't know. I would be surprised if these are published anywhere.

I found this massive 230 page report by FORD. Very impressive.

25% fuel improvement by downsizing the engine.

 

[RushMan]

And is there any way to figure out what gear we are in?

I am using an ODBD reader with Torque Pro software on my cellphone, and add-on PID definitions to display the tachometer and gear selection on my cell. I got the gear PID from the Escape forum and entered it manually into Torque Pro.
Also, On the Badlands, when in Manual mode on the gear selector, the current gear is displayed on the instrument panel.

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