Hyundai Accent Gets More Efficient Powertrain

Hyundai Motor Co.’s 2020 model Accent sedan features new engine and transmission systems that yield a 13% gain in fuel efficiency over the outgoing model.

Due later this summer, the new Accent has a U.S. Environmental Protection Agency rating of 36 mpg (33 mpg in the city and 41 mpg on the highway). This compares with 32 mpg (28 mpg city/38 mpg highway) for the 2019 Accent, when equipped with a 1.6-liter 4-cyl. gasoline direct injection engine and 6-speed automatic transmission.

The 2020 model switches to a 1.6-liter dual-port-injection engine and Hyundai’s version of a continuously variable transmission. The carmaker markets both systems under its Smartstream sub-brand. A 6-speed manual transmission also is available.

The new engine makes 120 hp and 113 lb.-ft of torque. That compares with the current model’s 130 hp and 147 lb-ft output.

The dual-port system in the new engine uses two injectors per cylinder with fuel flow controlled by driving conditions and driver inputs. High compression is reduced at initial engine start for further efficiency, Hyundai says.

Other enhancements include a high-energy ignition coil, narrow water jacket core and an external exhaust gas recovery system. A new thermal management module is used in place of a traditional thermostat, which Hyundai says increases cooling efficiency by adjusting the temperature of the radiator, transmission fluid cooler and heater.

Hyundai’s so-called “intelligent” variable transmission (IVT) uses a chain belt rather than the push belt system used in most CVTs.

The Accent’s IVT, which the carmaker says is a first for a compact car, performs continuous shifts by modulating pressure of the transmission’s pulley. The system utilizes a wide ratio pulley system, which provides a broader range of operation than other CVTs, according to Hyundai. This allows for improved fuel economy at higher gear ratios and improved performance at lower ratios.