What is it exactly? Only to keep the rpms high to get more torque?
What is it exactly? Only to keep the rpms high to get more torque?
I think its just an overdrive that makes the transmission shift sooner to get you up to speed. I never used it when test driving a mirage last week. Its funny how all the professional reviews Ive read never mention it but many complain about how slow the car is merging etc.......which I disagree with totally, and I didn't even use the B mode.
Believe it or not, there was ONE reviewer who did mention B mode. He said he had a blast with the CVT in B.
Thread: US: Mirage review - Driving the Highest MPG Car in America* (Gas2.org)
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View my fuel log 2014 Mirage ES 1.2 manual: 63.2 mpg (US) ... 26.9 km/L ... 3.7 L/100 km ... 75.9 mpg (Imp)
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View my fuel log 2015 Mirage DE 1.2 manual: 46.4 mpg (US) ... 19.7 km/L ... 5.1 L/100 km ... 55.7 mpg (Imp)
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View my fuel log 2015 Mirage ES 1.2 automatic: 40.5 mpg (US) ... 17.2 km/L ... 5.8 L/100 km ... 48.6 mpg (Imp)
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View my fuel log 2015 Mirage DE 1.2 manual: 46.4 mpg (US) ... 19.7 km/L ... 5.1 L/100 km ... 55.7 mpg (Imp)
ironhead - You misunderstand what an overdrive is. So did I for a long time. The majority of the time it is a reference to the gearing of a transmission. And stems from historical advancements of the automobile due to cars getting faster.
Old school 3 speed transmission, like in my 72 Plymouth Scamp. 1st & 2nd gear are underdrive gears. 3rd gear is drive gear 1:1
Underdrive are gears that allow the engine to spin faster than the transmission output shaft (driveshaft). Engine spins at say 2,000 rpm, the transmission output shaft spins at 1,500 rpm.
Drive gear is 1 to 1. Engine spins 2,000 rpm, transmission output shaft spins at 2,000 rpm.
Overdrive is greater than 1 to 1. Engine spins at 2,000 rpm, transmission output shaft spins at say 2,200 rpm.
The Mirage's manual transmission is 3 underdrive gears, and 2 overdrive gears (no drive ratio, which i can't understand why because 1:1 in a manual is achieved without having to manufacture at least one cog. 1st - 5th = 3.545, 1.913, 1.31, 0.972 and 0.804.
The Mirage CVT would actually be able to achieve an infinite number of such ratios as listed above, including overdrive ratios. However it seems like a G4 CVT I rented one time, the CVT would sort of hold ratios and fake in some "shifts." But maybe that was a different vehicle I'm thinking of.
The B mode must be controlling the CVT biasing it toward the underdrive ratios...
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View my fuel log 2020 Mirage ES 1.2 manual: 42.4 mpg (US) ... 18.0 km/L ... 5.6 L/100 km ... 50.9 mpg (Imp)
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View my fuel log 2015 Mirage ES 1.2 automatic: 40.5 mpg (US) ... 17.2 km/L ... 5.8 L/100 km ... 48.6 mpg (Imp)
mohammad (11-18-2021)