Hybrid highway driving mode...

[710-oil-614]

Nope. Not wrong.

Honda Hybrids going back to year 2000 are "series hybrids".

The term used BY SOME to describe the "RamCharger" or BMW EV with "gas range extenders" aren't the same. Not really hybrids since they are NEVER hybrid powered to the wheels.

Calling those "series hybrids" is really misleading. But I see where your confusion comes from.

Because technically, an EV with a gasoline charger is not a hybrid. No more than a Tesla is with a gasoline generator on a trailer behind it.

Hey man if you will it to be true I guess you’re right in your own mind!!

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[The Real Maverick]

Hey man if you will it to be true I guess you’re right in your own mind!!

Thanks for the laughs.

The terminology has evolved along with the technology, so to be most correct, you'll need to speak about a particular make, model, and year.

I'm gonna let the readership decide.

Volt: basically an EV with a gas powered recharger.

Insight: a series hybrid

Prius: a parallel hybrid that can sometimes act like a series hybrid and most closely matches the Maverick.

 

[Vaportrail]

Does anyone know if the electric and the engine run at the same time...on my 2023 xl I watch the horizontal blue line on the dash....when I drive 55 to 60 mph the blue dash line ( goes from 0 to60 ) sometimes stays around 55.... this is while in normal mode and I am driving on a flat surface with very little wind....

I'm not an expert, but in EV coach mode, I see 3 variations of the power bar.

White, which is ICE

Blue which is electric sailing

And a small blue bar, and white bar combination, which I'd assume means electric motor assisting the ICE...

 

[The Real Maverick]

I'm not an expert, but in EV coach mode, I see 3 variations of the power bar.

White, which is ICE

Blue which is electric sailing

And a small blue bar, and white bar combination, which I'd assume means electric motor assisting the ICE...

There's at least 5 modes:

All green: all regen braking

Green & white: regen and friction braking. (There are times of friction braking only but it's not illustrated that I've seen.)

All blue: all electric propulsion

Blue with white: gas & electric propulsion

All white: all gas (or predominantly gas) propulsion

Tip: the blue box around the white means "drop throttle demand to here and get EV mode".

The size of the blue box shows how much electric power you have available and shrinks fast when your battery is 35% and falling and goes away at 30%. You cannot drive EV with less than 30%. You need 45% and greater to drive above 50 mph in EV.

Electric only is possible up to 80 mph. But, to see it in effect, you'll probably need to be going downhill. As speed goes up, torque goes down. And vice-versa.

 

[Maverick2023]

Please keep your eyes on the road and cars in front of you. Keep checking the EV coach screen and you are going to rear end someone some day

 

[Rowerwet]

While the traction battery is rarely engaged in propelling on the interstate, the electric motors are both always in use to give the transmission its gear ratios. They can be spinning at different rates, or electrically locked to directly turn the transmission at engine speed.

 

[wax87]

What's this "three count" talk?

I usually have the gas on (pulse) for 5-10 seconds, then have the gas off (glide) for 30 seconds or more.

Does this every day of the week.
(Non-highway. 35-45 zones)

Ya, I know. Looks "crazy". And it is. Crazy good MPG.

I've exceeded 800 miles on a tank two times. Almost always go 700 miles.

averaging around 23 MPH?

 

[The Real Maverick]

averaging around 23 MPH?

In the city with stoplights on every corner I think you'll agree that's actually a pretty good pace. The clock keeps ticking while you are standing still. But I'm not burning any gas while standing still.

 

[The Real Maverick]

While the traction battery is rarely engaged in propelling on the interstate, the electric motors are both always in use to give the transmission its gear ratios. They can be spinning at different rates, or electrically locked to directly turn the transmission at engine speed.

This is the generator motor, yes. ^

The traction motor is a fixed ratio to the wheel speed.

Here is a case where the engine was in "direct drive" mode.

Note generator was basically standing still while vehicle was at highway speed.

 

[AutobahnSHO]

Yeah we live on serious hills and we're averaging 37mpg over 11k miles, 17 months. Which is still pretty amazing!

 

[Chopperbobc]

I guess that I am using a different screen on my xl....my bar is always blue and goes from 0 to 60 and again at 60mph on the highway, my blue line sometimes reads about 50 ..... this tells me that I am using both electric and gas because engine mph should only be about 34....

 

[CD_SM]

Series hybrid just means the electric motor and gas engine are on the same driveline. Like stacked batteries in a pen light (series flashlight).

In in series hybrid, propulsion can come from electricity only, gasoline only, or both simultaneously. ALMOST the same as a parallel system.

The difference? No EV mode in a series hybrid. Since there is only one driveline, there can't be independent operation of one component. That is, if the engine spins, the electric motor must spin. If the motor spins, the engine must spin.

There can be "simulated" EV mode. The motor alone can provide all the torque and the engine can "freewheel" without burning any fuel, just like the reverse. The motor can "freewheel" without using any power and the engine can provide all the torque. These cases are rare.

USUALLY the engine and motor are providing torque at the same time. In both styles of hybrids.

No. A series hybrid has only the electric motor connected to the drive wheels, by definition. A train locomotive is the quintessential series hybrid. The wheels are powered by the electric motor only; the ICE powers a generator that powers the electric motor. (And/or the ICE charges a battery and the battery runs the motor.) The ICE has no mechanical connection to the wheels - in a real sense the generator and electric motor are a very efficient transmission. Hence the name: the ICE and electric motor are in a series: ICE to generator to electric motor. The Chevy Volt was a series hybrid*, and AFAIK was the only mass produced series hybrid car.
OTOH, the Maverick (and the very similar Prius) is a parallel hybrid, in that either or both systems (ICE and electric) can power the vehicle independently. In a flow chart view, the ICE and electric motor are next to each other, both providing mechanical input to a (mechanical) transmission that drives the wheels. I am quite sure that all current standard (non plug-in) hybrids are parallel hybrids. (I am not as sure about all current plug in hybrids though; some may be series. And if you hear the words "range extender" (like the proposed Mazda rotary hybrid) that also indicates a series hybrid.)

*(Pedants will point out that the Volt did actually have a highway mode where the ICE powered the wheels directly, but that's kind of silly. That mode only engaged in very specific highway situations. It was analogous to a lockout in a torque converter, and you would never say that a lockout makes an old school automatic transmission not hydraulic...)

 

[CD_SM]

Volt: basically an EV with a gas powered recharger.

That is in fact the definition of a series hybrid. Diesel electric locomotives work the same way and are in fact the ur-hybrid. We just didn't call them that when they were invented.

Another way of putting it:
in a series hybrid, if you take the electrics (battery, motor) out, you would have to replace them with something (like a mechanical transmission) to make the car move.
But in a parallel hybrid, if you take out the electric motor and battery, the car can still go without adding anything back, just less efficiently.

 

[HeyBales]

Here's what Ford calls it in there HEV document. (pictures aren't showing up here)
Under the newest Summary for Hybrid (won't let me right-click copy link on file).
https://www.motorcraftservice.com/freeresources/obd

Microsoft Word - OBDSM1901_HEV.docx
page 7

Propulsion Modes

Series Mode
• Used only when vehicle is not moving and the engine is running
• Engine may be running for battery charging, cabin or battery temperature control, or catalyst warm-up.

Positive Split Mode
• Engine is ON and driving the generator motor to produce electricity
• Power from the engine is split between the direct path to the road and the path through the generator motor
• Generator power can flow to the battery or to the traction motor
• The traction motor can operate as a motor or a generator to make up the difference between the engine power and the desired power
• This is the preferred mode whenever the battery needs to be charged or when at moderate loads and low vehicle speeds

Negative Split Mode
• The engine is on and the generator motor consumes electrical energy to reduce engine speed
• The traction motor can operate as a motor or a generator to make up the difference between the engine power and the desired power
• Typical highway mode
• Occurs when the engine needs to be on, the
system can not be operated in parallel mode and the battery is charged near its upper limit

Electric Mode
• The vehicle is propelled by stored electrical energy only
• The engine is turned off
• The tractive torque supplied from the traction
motor
• Preferred mode whenever the desired power is
low enough such that it can be produced more
efficiently by electrical system than engine
• Preferred mode in reverse because the engine
can not deliver reverse torque
• Separate electric pump maintains power
assisted steering


City & Highway Traffic Scenarios

Stopped
• The engine will be off unless it needs to be on for reasons other than tractive power (Max A/C, vacuum, catalyst temp, heat, purge, low SOC)

Launching
• At low speed or low power demand, the launch mode will be electric, unless the engine needs to be on for other reasons.
• At moderate speed or high desired power, the engine will come on.

Entering highway or Passing
• At high acceleration demand, the engine power will be boosted with battery power through the traction motor to provide quick V-6 like response.

Cruising
• At light load, the system may operate in parallel, positive split or negative split mode depending on the battery charge.
• At heavy load (due to high speeds, weight, towing or grade), the system will be limited to engine only performance (no battery support).
• Limited regenerative braking will be used. Exiting highway
• Provides an opportunity for regenerative braking.

Braking
• At high speed, the engine torque is ramped down, the traction motor regenerates to a limit and the foundation brakes are applied as necessary (at the traction motor or battery regen limits).
• At moderate and low speed, the engine will be turned off.

 

[Chopperbobc]

Thank you....I did make a mistake... The speed was mph (0 to 60 ) on the screen, but the blue line 50 reading and the 34 were MPG...

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