How can you get better engine efficiency or better mileage with a CVT with more
transmission friction loss than dual clutch units?
According to the Honda Accord's Chief Engineer, Koji Ninomiya, the key advantage of Honda's two - motor approach over the power - split design is its simpler gearing which can reduce internal
transmission friction losses by as much as 50 percent.
Not exact matches
In all modes, the Golf reduces
friction losses by decoupling the motor from the one - speed
transmission and «sailing» whenever you lift off the pedal.
The all - new Porsche Doppelkupplung (PDK) eight - speed twin - clutch automatic
transmission delivers 28 - percent less
friction loss than its predecessor, and shifts just as smoothly.
In the manual
transmission - equipped 86, this engine reduces
friction and pumping
loss, helping to provide an optimized power curve.
CVTs are
friction devices and have continuous
friction type
loss and wear whereas the dual clutch
transmission only exhibit
friction loss and wear during the actual shift which takes less than a second.
Like dual clutch
transmissions it can powershift so it doesn't have torque interruption on acceleration, and it can
friction launch, so no torque convertor
losses are necessary.
Specially designed grooves on the
friction material which are integrated into the
friction lining for oil flow and cooling provide very low
losses at the clutch in the open state, enable high
transmission efficiency and smooth shifting capability while increasing fuel economy.
Friction - reducing design features, including all - new ultra-low viscosity
transmission fluid, internal thermal bypass, minimal number of non-applied clutches and other lower mechanical spin
losses, contribute to the 10 - speed's effect on improved vehicle efficiency.
The new
transmission also features a three - pronged approach to
friction loss, ultimately boosting economy.
The advanced solution also employs high - energy wet
friction materials with a special groove design to minimize spin
losses and provide improved heat resistance, high torque capacity and reliable operation over the
transmission's lifetime.