Toyota's Hybrid Synergy Drive Migrates to a New Host
Toyota has just given us more info about the Auris HSD hybrid concept car that will be unveiled next week in Frankfurt. The car was obviously designed with Europe in mind; the small 5-door hatchback configuration is what sells best there, and that's what the Auris hybrid offers. It will used the HSD (Hybrid Synergy Drive) tech that was introduced in the 3rd generation Prius last January, and Toyota claims that it is the "logical first step in deploying full hybrid technology across Toyota's entire European model line-up". Read on for many more photos and technical specifications.
Some changes have been made to the Auris to make it more "slippery" and thus reduce the amount of fuel it uses (especially at highway speeds).
The front end is designed to optimise airflow and so help maximise fuel efficiency. The front and rear bumper corners have flat surfaces, a feature that not only accentuates the car's wide and solid stance, but also smoothes the flow of air over the vehicle's flanks, minimising turbulence and drag.
The ride height is lower by 20mm compared to the conventional Auris, and underbody panels and a rear diffuser have been fitted to smooth and control airflow beneath the car. The bespoke 18-inch alloy wheels are designed to cut air turbulence in the wheel arches and are shod with low rolling resistance tyres. A larger, more efficient rear spoiler is also fitted. These aerodynamic elements target a drag coefficient of 0.28.
By comparison, the 3rd gen Prius has a drag coefficient of 0.25.
Auris HSD Concept Technical Specifications
Acceleration from 0 to 60 MPH will take around 10 seconds (similar to the 3rd gen Prius, which is rated at 9.8 seconds). The gas engine will be a 1.8-liter 4 cylinders, and the electric motor will have a peak of 60 kW and be powered by NiMH batteries.
CO2 emissions should be sub-100g/km.
It will "offers four driving modes, three of which can be selected on-demand by the driver: ECO mode maximises hybrid system efficiency and fuel economy; Power mode boosts performance; and EV mode - a feature only available with a full hybrid system - allows for ultra-quiet running on electric motor power alone for up to 1.25 miles (2km) at speeds up to 31mph, with zero fuel consumption and zero CO2 and particulates (PM) emissions."