|Cutaway of the new CVT for mid-size vehicles. Click to enlarge.|
Honda Motor Co., Ltd. has developed a new continuously variable transmission (CVT) for mid-size vehicles that significantly enhances both driving performance and fuel economy. The new CVT is the latest addition to the Earth Dreams Technology (earlier post) series of next-generation technologies for automobiles.
The all-new Step WGN and Step WGN Spada in Japan will be the first vehicles to feature this new CVT and will offer the highest fuel economy in their class, based on Honda calculations for 5-number (i.e., compact-size), 2.0 liter-class vehicles with a height of 1,800 mm or more and seating seven or eight occupants (as of April 2012).
|Current model of the Step WGN Spada. Click to enlarge.|
To enhance fuel economy, the new CVT is compatible with an idle-stop system and features a high-efficiency electric oil pump and high-strength belt, among other features. The wide ratio range offers cruising with enhanced torque in the lower rpm range, thereby enhancing fuel economy. At the same time, the wide ratio range increases drive power during off-the-line acceleration to help realize an exhilarating and sporty driving feel.
The G-Design Shift, a new coordinated control system for gearing, throttle and hydraulic control, responds quickly to driver input, maintains strong and smooth acceleration G and helps realize an exhilarating and sporty driving feel.
Through this combination of technologies, in a comparison of Honda vehicles in the same class, the new CVT offers 5% higher fuel economy than a conventional CVT and 10% higher than a 5-speed automatic transmission.
In November 2011, Honda announced Earth Dreams Technology, a series of next-generation technologies for automobiles that significantly enhance both driving performance and fuel economy, combining environmental responsibility with the fun driving customers expect from Honda.
The first technologies in the series were the newly developed engine and CVT for minicars that were featured on the N BOX. The new CVT for midsize vehicles featured on the all-new Step WGN and Step WGN Spada is the second technology to join the series.