Toyota Yaris’ hybrid powertrain in detail

Article by Christian Andrei, on February 7, 2012

Toyota designed its latest modern supermini – the new Yaris Hybrid – in such a way that its hybrid powertrain won’t reduce the space in the cabin and the boot. Toyota came up with this innovative compact version of Toyota’s Hybrid Synergy Drive system that is featured in bigger models like the Prius and Auris Hybrid.

After some extensive research and development, Toyota was able to build an efficient, full hybrid system for Yaris with the use of a petrol engine and electric motor, giving a total power output of 99bhp (74kW). The system comes with a new 1.5-litre Atkinson cycle petrol engine that is 16.5kg lighter and is 10% more compact than the 1.8-litre unit used in Prius and Auris.

Major parts like the electric motor, power control unit and transaxle also became lighter and smaller. The motor size was reduced by 20% and the PCU by 12% when compared to those in Auris Hybrid.

In addition, the transaxle has dropped 11kg and is shorter by 6%. The car also had to be planned in such a way so that the size and location of the nickel-metal hydride battery pack and the fuel tank would not have a significant impact on the cabin space for rear seat passengers and the boot’s size.

These two are located underneath the rear bench seat. As a result, there’s no impact on the car’s loadspace capacity, and rear passenger space. Yaris hybrid is equipped with the latest advancements in full hybrid technology and could offer class-leading CO2, NOx and particulates emissions, along with outstanding fuel consumption and low total ownerships costs. The new model is expected to start selling this June in the UK.

Toyota’s new Yaris Hybrid is the first-ever full hybrid vehicle in the European B-segment to go on sale. It is the flagship vehicle of the Yaris model range and it represents a freshly unique offer in the highest sales volume segment in Europe. It is also the carmaker’s best-selling core model in the region, with over 2.5 million units sold. Now, the Yaris will be bringing the benefits and advantages of the full hybrid technology that it uses to a much wider audience than before.

The car is the only one in the B-segment to offer customers three different powertrain options: full hybrid, petrol, or diesel.

Combining the Yaris model range’s ingenious packaging plus urban agility with the efficiency and unique driving experience offered by Toyota's HSD or Hybrid Synergy Drive, the Yaris Hybrid is a new big step in the carmaker’s full hybrid roll-out strategy in Europe. Moreover, it represents your ultimate urban car, what with its low fuel consumption, its low environmental impact, its great maneuverability, its unique EV capabilities, and its strong acceleration.

The car’s new powertrain was optimized for installation within its compact, highly efficient packaging design, without any detriment to the system performance and quality or to passenger accommodation and loadspace. This downsized hybrid system joins together a substantially reengineered 1.5-liter petrol engine and a lighter yet more compact electric motor, inverter, transaxle, and battery pack.

This outstandingly efficient powertrain gives you the best fuel consumption/CO2 emissions results and performance in the B segment. It generates an average fuel usage of only 3.5 l/100 km and CO2 emissions of 79 g/km, which boasts of numbers that are the best in its segment. This while allowing you frequent, all-electric driving periods with zero PM, NOx, or CO2 emissions.

Additionally, with the Yaris Hybrid’s fuel consumption in the urban cycle, it represents the perfect urban mobility choice just when fuel prices are at their peak levels. In fact, according to internal test data, a high proportion of distance and journey time can be achieved with the engine off, therefore representing significant fuel consumption benefits.

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