Compared to DaimlerChrysler's MDS system, Honda's choice to offer cylinder deactivation on a V6 makes for a more complex operation system.
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| The Accord uses a regular automatic transmission, rather than a CVT unit which can be found in most self-shifting hybrids. (Photo: Justin Couture, Canadian Auto Press) |
When MDS comes into play, it turns the Hemi V8 into a four-cylinder engine, but when Honda's version takes action it makes the smooth V6 into a coarse, noisy inline-three - something that most traditional Honda customers would probably not enjoy, especially given that this is Honda's "halo" hybrid. To counter the vibrations, Honda has fitted 'active' electric engine mounts which adjust automatically. The torque converter in the transmissions works to further squelch the noise by clutching in sync with the vibes.
Torque converter? Yes, the Accord uses a regular automatic transmission, rather than a CVT unit which can be found in most self-shifting hybrids. Like the V6 engine, integral modifications have been made in the name of bettering fuel economy. From the interior or behind the wheel there's no difference to be found; the gearbox shifts the
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| As the electric and gas motors have different peaks, the totals work out to being 255 hp and 232 lb-ft of torque, all of which was gained by adding the IMA motor. (Photo: Justin Couture, Canadian Auto Press) |
same as the regular five-speed automatic. In this case, the modification is structural, reducing the overall length of the entire gearbox by 60 mm (2.4 inches) in order to make room for the IMA electric assist motor.
Sandwiched between the engine and the gearbox is the all-important electric motor. Following the progression curve of technology, the Accord's motor is thinner and more powerful than the Civic's. At 68 mm (2.7 inch) thick, the 13.8 Kw motor generates a peak of 16 horsepower and 100 lb-ft of torque, providing an excellent output to size ratio and the extra boost which the heavier Accord needs. While the electric and gas motors' individual power and torque peak at different times and levels, their combined effort works out to a maximum of 255 hp and 232 lb-ft of torque, all of which was gained by adding the IMA motor.
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