Okay, that makes sense to me.Typically, "final reduction" refers to the differential, the gear set that converts main driveshaft rotation to the half-shafts turning the front wheels, and allows them to turn at different speeds to navigate turns without scrubbing the tires. In the old days, you could select different ratios and could brag about having a "4.11 rear end" - the ratio is a tradeoff between acceleration and fuel economy.
The other ratio is the gearbox which is lowering engine speed (and increasing torque) and sending power to the differential. These two gearboxes are in series, so you could multiply the ratios to get an overall ratio of engine speed to wheel speed.
The interesting tidbit about it using the traction motor rather than generator for charging the battery while in engine drive mode is the only new thing, and thinking about it it does make sense to do it that way (it also implies that when the direct-drive transmission kicks in, it must decouple the ICE from the generator).
Unless I’m mistaken, isn’t that what’s happening in the two segments labeled Hybrid drive (Charge) and Hybrid drive (Assist)? Engine runs generator to give traction motor more power than battery alone can provide and traction motor drives wheels with the increased power. So both engine and traction motor are powering wheels at the same time. It’s just that the engine is powering the wheels indirectly.I still wonder why there isn't a segment in Figure 11 showing when both the engine and traction motor combine to power the Clarity.
Unless I’m mistaken, isn’t that what’s happening in the two segments labeled Hybrid drive (Charge) and Hybrid drive (Assist)? Engine runs generator to give traction motor more power than battery alone can provide and traction motor drives wheels with the increased power. So both engine and traction motor are powering wheels at the same time. It’s just that the engine is powering the wheels indirectly.
Engine only mechanically powers wheels at higher speeds and then it’s the sole source of wheel power (while also recharging HV battery).
Have I got that right?
Maybe it’s a question of semantics.In the two Hybrid Drive segments, the engine is powering the starter motor/generator. Only when the Engine Drive clutch is engaged can the engine be powering the wheels. And in the figure's only segment depicting Engine Drive mode, the traction motor is generating power to recharge the battery.
Honda claims the Clarity produces 212 hp. They also say the traction motor produces 121 hp on battery power alone and 181 hp when powered by both the battery and the engine-powered starter motor/generator. The only way to get to 212 hp is to have the clutch combining the power of the engine and the traction motor. If the engine is powering both the wheels and the generator, it can't be sending its full 103 hp to the wheels, which would explain why the Clarity can't produce 181 + 103 hp.Maybe it’s a question of semantics.
I think the engine IS powering the wheels (just not mechanically) along with the traction motor because it’s using the starter motor/generator to provide more power to the traction motor than the battery alone.
Except that didn’t one of the Service Bulletins that AnthonyW provided say that when its mechanically clutched to the wheels that the traction motor is not used?Honda claims the Clarity produces 212 hp. They also say the traction motor produces 121 hp on battery power alone and 181 hp when powered by both the battery and the engine-powered starter motor/generator. The only way to get to 212 hp is to have the clutch combining the power of the engine and the traction motor. If the engine is powering both the wheels and the generator, it can't be sending its full 103 hp to the wheels, which would explain why the Clarity can't produce 181 + 103 hp.
In another thread I started, I asked how the Clarity could possibly produce 212 hp when Figure 11 showed that in Engine Drive mode the traction motor is generating electricity to recharge the battery. Another figure in that paper shows engine load vs road load. It implies that the two power sources do work together in some circumstances that are not depicted in Figure 11. The Service Bulletin appears to side with Figure 11, but doesn't explain how 212 hp is possible.Except that didn’t one of the Service Bulletins that AnthonyW provided say that when its mechanically clutched to the wheels that the traction motor is not used?
I assume you didn't pop for the Touring option in your '46 Jeep?Makes me long for my ‘46 Jeep with its “Go-Devil” flathead 4 engine, 3 speed manual transmission, mechanical clutch, and not a semi-conductor anywhere![]()
Here is the link to where you sign up for this. $10/day, $50/30 days, $350/365 days. (More $ for better search options, thanks AnthonyW)
OK - so WHERE is the explanation of why remote climate control knocks out SiriusXM radio functions?
I learned to drive on a '46 Willy's Jeep. My new Clarity is a long way from there.Makes me long for my ‘46 Jeep with its “Go-Devil” flathead 4 engine, 3 speed manual transmission, mechanical clutch, and not a semi-conductor anywhere![]()
We drive with ECON on, Sport off, and HV off 100% of the time around town. To me that is the equivalent of EV. We can drive for weeks or even months without using more than a smidgen of gas. I'm pretty happy with the ability to drive in EV that way pretty much all the time.So, how does one select EV mode?