The new Yaris Hybrid: a quiet revolution in the B-segment — Flagship of Toyota’s best-selling core model in Europe
— Only full hybrid powertrain in the B-segment - the ultimate urban car
?— Clever Hybrid Synergy Drive system packaging allows for great fuel
efficiency and low emissions with no compromise on space
— Toyota’s advanced full hybrid technology more accessible than ever
— Yaris range offers a unique choice of 3 powertrain types - full hybrid now
available alongside petrol and diesel
— Only manufacturer to produce full hybrid technology in two plants in
The new Yaris Hybrid is the first full hybrid vehicle to go on sale in the European B-segment. The Yaris model range flagship, it represents a new and unique offer in Europe‟s highest sales volume segment, and will bring the benefits of full hybrid technology to a wider range of customers than ever before.
The Yaris is Toyota‟s best-selling core model in Europe, with more than 2.5 million units sold. It is the only B-segment car to offer customers the choice of 3 different powertrain types – full
hybrid, diesel or petrol.
Combining the ingenious packaging and urban agility of the Yaris model range with the unique driving experience and efficiency of Toyota‟s Hybrid Synergy Drive? (HSD), the Yaris
Hybrid is a new major step in the company‟s full hybrid European roll-out strategy.
With low fuel consumption, low environmental impact, strong acceleration, great manoeuvrability and unique EV capabilities, it represents the ultimate urban car. The new powertrain has been optimised for installation within the vehicle‟s compact, extremely efficient packaging design, without detriment to either system quality and performance, or passenger accommodation and loadspace. The downsized hybrid system combines a substantially re-engineered 1.5 litre petrol engine with a lighter, more compact electric motor, transaxle, inverter and battery pack.
The highly efficient powertrain offers the best balance of performance and fuel consumption/CO emissions in the B segment. It delivers an average fuel consumption of just 2
3.5 l/100 km and segment-best CO emissions of only 79 g/km, whilst allowing customers 2
frequent, all-electric driving periods that emit no NO, PM or CO emissions. x2
With segment-best fuel consumption of 3.1 l/100 km in the urban cycle, the Yaris Hybrid
represents the ideal urban mobility choice at a time when fuel prices are reaching peak levels. Internal test data show that a high proportion of journey time and distance can be undertaken with the engine off, representing significant benefits in fuel consumption. Expected to represent 20% of all Yaris model sales in Europe, the Yaris Hybrid is not a niche model. Rather, it represents a new, unique alternative for demanding urban drivers who expect a new driving and ownership experience from their car.
The Yaris Hybrid combines the tangible benefits of advanced technology, low emissions and unbeatable cost of ownership with a new, uniquely relaxed and quiet driving style. Its HSD system proves that driving pleasure needs not to be compromised by environmental responsibility and low running costs, and it shares the traditionally high residual values of all Toyota Hybrids.
With Toyota Motor Manufacturing UK (TMUK) already assembling Toyota full hybrid vehicles, the start of Yaris Hybrid production at Toyota Motor Manufacturing France (TMMF) makes Toyota the only manufacturer to have two full hybrid technology production facilities in Europe, reinforcing the company‟s commitment to local, advanced technology manufacturing
Following the launch of the Auris Hybrid, the Yaris Hybrid is Toyota‟s second core model to feature HSD technology. From 2012, the Toyota hybrid range will feature five models: the Yaris Hybrid, the Auris Hybrid, the Prius, the Prius+ and the Prius Plug-in Hybrid.
A more aspirational design for the most efficient
package in the segment
— More advanced and sophisticated design for Yaris flagship
— No compromise on Yaris’ efficient packaging DNA
— New hybrid exclusive pearl white colour execution
— Interior featuring hybrid-exclusive blue details and illumination
At its original launch, the Yaris quickly became nicknamed “Piccolo Genio” (Little Genius). This is a testament to a car which has been developed over successive generations in accordance with the key concept of “compact outside whilst roomy inside”, consistently setting new standards in packaging ingenuity.
The Yaris Hybrid inherits all the clever DNA of the standard, third generation model, offering B segment customers an ingenious combination of small, compact packaging and a spacious, practical interior.
The Yaris Hybrid differentiates itself from the other Yaris derivatives with an exclusive, aerodynamically efficient exterior design which instantly identifies it as the flagship of the Yaris model range.
It combines a new, more aggressive, Under Priority frontal design element - the distinctive new Toyota face design execution, with a Keen Look detailing reinforced by hybrid-specific LED lights.
Flanked by aerodynamically efficient front aero corner treatments, the strong centre section of the lower bumper houses a larger, trapezoidal lower grille optimising engine bay cooling whilst emphasise the new hybrid‟s ground-hugging stance and low centre of gravity.
A slimmer upper grille, elegantly sculpted to highlight the hybrid-blue Toyota badge, is flanked by slim, Keen Look headlights which emphasise the new hybrid‟s bold, horizontal front styling. Exclusive to the Yaris Hybrid, the projector-type headlamp unit features standard chrome-plated „eyebrows‟ lipped with an LED „lightguide‟, and LED Daytime Running Lights (DRL).
In profile, identified by hybrid badging and exclusive wheel designs, the new hybrid shares the stylish, cab-forward silhouette and long wheelbase profile of the standard Yaris. The exterior overall length is only 20 mm longer than the standard Yaris.
To the rear, the hybrid-blue badged tailgate incorporates a new, LED-type high mounted stop light, and clear lens combination lights incorporate a LED tail and stop lamp signature unique to the new Yaris Hybrid.
The Yaris Hybrid is available with a choice of unique 15” and 16” aerodynamic wheels, and a range of eight body colours including a model-specific new Pearl White finish execution. Toyota pioneered this Pearl White finish, which has required the introduction of a bespoke production process at the TMMF plant where the new hybrid is built. Reinforcing the Yaris Hybrid‟s uniquely stylish and environmentally-conscientious design credentials, the new
colour delivers a cool, high quality image (particularly in sunlight) when the soft, silken lustre of pearl is at its strongest.
On board, Yaris Hybrid customers benefit from a driver-focused cockpit with hybrid-exclusive details and trim finishes.
Silver ring-trimmed three dimensional instrument dials incorporate a hybrid system indicator and feature a combination of white and blue backlighting. The centre console-mounted Toyota Touch system incorporates a hybrid energy monitor illuminated in blue as well as the dual zone air-conditioning.
The dashboard soft-touch pads and front door trims are finished in an exclusive, Ice Grey colour, and blue stitching trims the leather upholstery, steering wheel and hand brake. A unique gear lever to the hybrid derivative comes standard with blue finish on the gear knob.
Downsized full hybrid
powertrain for fuel and space efficiency
— Substantially re-engineered 1.5 litre petrol unit engine combined with
downsized hybrid system components
— Compact battery, relocated under the rear seats to preserve boot space — Total system output of 100 hp, with low, 3.5 l/100 km fuel consumption — Best in class CO, NO and Particulate Matter emissions 2X
— Frequent all-electric operation with no fuel consumed and zero emissions — Driving range of 1,000 km on one tank of fuel
The new Yaris Hybrid introduces the first downsizing of Toyota‟s proven Hybrid Synergy Drive?
(HSD) technology. It represents a significant engineering breakthrough in the packaging of the full hybrid powertrain.
The new powertrain has been optimised for installation within the vehicle‟s compact, extremely efficient packaging design, without detriment to either system quality and performance, or passenger accommodation and load space.
Every key HSD component has been reduced in size and weight, and both the fuel tank and battery are installed under the rear seat. As a result, the Yaris Hybrid maintains identical occupant space and the same 286 litre luggage capacity as that of the standard model. The downsized full hybrid system combines a 1.5 litre petrol engine unit with a lighter, more compact electric motor, transaxle, inverter and battery pack. The total system weight is 201 kg, 20% (42 kg) less than that of an Auris Hybrid.
Compact, Lower Displacement Petrol Engine
The 1,497 cc, 16 valve, DOHC Atkinson Cycle petrol engine with VVT-i is based on the engine block of the second generation Prius, but has been completely re-engineered. It is 50 mm shorter and 17 kg lighter than the 1.8 litre unit of existing Toyota full hybrid powertrains, equating to a 10% reduction in length and a 17% reduction in weight.
The new engine generates a maximum 55 kW/74 DIN hp at 4,800 rpm and maximum torque of 111 Nm from 3,600 to 4,400 rpm. With a focus on lower emissions and the minimisation of mechanical friction for improved fuel efficiency, some 70% of all engine components are either new or redesigned.
Overall, the thermal efficiency of the Yaris Hybrid petrol engine has been improved by 6% over that of the second generation Prius, contributing to improvements in both fuel efficiency and environmental performance.
Newly adopted engine technologies include a cooled Exhaust Gas Recirculation (EGR) system, an electric water pump, the elimination of the auxiliary drive belt, a low-friction timing chain, a lightweight, resin-based intake manifold and a compact exhaust manifold.
When used in combined with a cooled EGR system, the Atkinson cycle engine offers significant gains in fuel efficiency and the reduction of emissions.
In the Atkinson cycle, compression and expansion are asymmetrical, and the inlet valves close late, delaying compression. This creates a high expansion ratio for less compression, converting combustion energy to engine power more effectively. As a result, the exhaust temperature is lower than that of conventional engines. The cooled EGR system reintroduces cooled exhaust gas into the intake system, further reducing engine operating temperatures.
Allied to a small, lightweight, multi-function radiator, the adoption of an electric water pump both enhances engine warm-up performance and reduces cooling friction loss, improving fuel efficiency. The elimination of a mechanical pump drive belt reduces friction, further improving fuel economy.
A new, more compact, hybrid-exclusive resin-based intake manifold combines light weight with improved quietness through the reduction of both vibration and noise. And the use of highly efficient, 12-hole atomizing fuel injectors reduces both fuel consumption and emissions. The exhaust system features a new, low heat capacity, maniverter-type exhaust manifold. By positioning the catalytic converter much closer to the engine exhaust port, it decreases the catalyser warm-up time by 24% and contributes to a marked improvement in emissions during shorter journeys.
Downsized Hybrid Transaxle
Housing the electric motor, generator, power split device and double-motor reduction mechanism in one lightweight, highly compact transmission casing directly comparable in size to that of a conventional gearbox, a new transaxle lies at the heart of the Hybrid Synergy Drive? system. The use of a smaller E-CVT electric continuously variable transmission and a more compact electric motor effects a 6% reduction in the length of the Yaris Hybrid‟s hybrid transaxle and an
11 kg weight saving over that of the Auris Hybrid, creating the most compact hybrid transmission yet engineered by Toyota.
Generating an immediate maximum of 45 kW and 169 Nm torque during acceleration, the new electric motor has been made smaller and lighter through the optimisation of the magnet material, and the winding of the coils with flat, rather than round, wire. The motor cooling structure has also been improved, allowing for a smaller, yet more efficient and powerful motor.
The transaxle now incorporates a multifunctional motor reduction gear within the power division mechanism, and a new gear deceleration mechanism abolishes the use of chains. Gear tooth grinding and shaving technology similar to that used on the Auris Hybrid effects a notable reduction in transmission noise and vibration. This is further lowered by the adoption of a newly designed torsional vibration damper. Its smaller diameter made possible by the use of a three spring structure. The new, lightweight damper helps suppress the transmission of engine vibrations to a minimum level.
The optimisation of lubrication both improves transaxle efficiency and minimises energy losses. A new lubrication mechanism is adopted, in which each gear and bearing is lubricated by combing up the Automatic Transmission Fluid (ATF) with the rotation of the final driven gear and counter driven gear, reducing driving force losses.
The use of a split construction oil catch tank which supplies oil for both the motor/generator and gear lubrication lowers the dynamic oil level, reducing agitation losses.
More Compact Hybrid Battery
The new, downsized full hybrid powertrain also features a smaller, 144 V nickel-metal hydride battery with a more efficient vehicle electric power management system.
The number of cells has been reduced from the 168 of the current, Auris Hybrid battery to only 120, composed of 20 modules connected in series. This effects a decrease in volume of 20% and a weight saving of 11 kg, allowing for the installation of the new battery entirely under the rear passenger seats, with no intrusion into the cargo loadspace.
In addition to this reduction in size and weight, battery charging efficiency has been improved, and the pack state-of-charge recovery time has been decreased by 67% compared to that of the Auris Hybrid.
New Power Control Unit with Smaller Inverter and Converter Due to a reduction in hybrid system current and voltage, the system‟s Power Control Unit has also been made smaller and lighter through the development of a more compact inverter and switching unit.
Smaller and lighter than that fitted to the Auris Hybrid, the new inverter features a newly structured capacitor, reduced energy losses and improved cooling, enhancing fuel efficiency. By optimising the layout of internal components, the size and weight of the DC-DC converter have also been reduced. And the composition of the noise filter has been revised to enhance unit quietness.
Compared to the Auris Hybrid, unit output current has been reduced from 120 to 80 A and output voltage lowered from 650 to 520 V, saving system energy with no loss of performance or efficiency.
Hybrid System Performance
Combining the power of a 55 kW petrol engine and battery powering the electrical motor, the
Yaris Hybrid‟s highly efficient powertrain generates a maximum 74 kW/100 DIN hp system output.
It offers the best balance of performance and fuel consumption/CO emissions in the B segment. 2
The Yaris Hybrid will accelerate seamlessly from 0-100 km/h in 11.8 seconds, and on to a maximum speed of 165 km/h. Conversely, it delivers an average fuel consumption of just 3.5 l/100 km and segment-best CO emissions of only 79 g/km, whilst allowing customers frequent 2
driving in modes that emit zero NO, PM or CO emissions. Its exceptional fuel efficiency gives x2
the Yaris Hybrid a driving range of 1,000 km on a single tank of fuel.
Hybrid Synergy Drive in Operation
Over the course of any journey, Toyota‟s Hybrid Synergy Drive? system operates in several
different modes to maximise the Yaris Hybrid‟s‟ overall efficiency. At rest, the engine stops
automatically to save fuel. Under operating conditions of low engine efficiency such as start up
and low to mid-range speeds, the vehicle runs on the electric motor alone, thus eradicating CO, 2
NO and PM emissions. x
Under normal driving conditions, power allocation is constantly adjusted between engine and electric motor to combine optimum performance with maximum fuel efficiency.
Via an Electronically Controlled Braking system, the electric motor acts as a high-output
generator during deceleration and under braking to effect regenerative braking,
optimising energy management in the Hybrid Synergy Drive? system by recovering
kinetic energy (normally wasted as heat under braking and deceleration) as electrical
energy for storage in the high performance battery.
Well balanced dynamics,
ideal for city driving
— Zero emission driving possible for a high proportion of journey length and
— Transmission optimised for a more natural acceleration feel
— Two additional on demand driving modes: EV and ECO
— Class leading turning radius of 4.7 meters
— Low, 550 mm centre of gravity
— Electronically Controlled Braking system for powerful and progressive
Building on the inherently quiet, smooth power delivery of Toyota‟s Hybrid Synergy Drive?,
the fundamental elements of intrinsic driving pleasure – such as acceleration/braking feel,
balance and agility – have been thoroughly refined without any compromise in the new Yaris Hybrid.
Toyota‟s engineers have undertaken exhaustive testing to ensure the new Yaris Hybrid‟s dynamic abilities will meet customer expectations at all vehicle speeds and in all driving scenarios.
Full Hybrid in operation
Recent real world tests with Toyota‟s Hybrid Synergy Drive powertrain reveal that the Yaris
Hybrid zero emissions driving accounts for around 66% of the average commuter journey length and around 58% of the total journey time, with the petrol engine being switched off. The electric motor‟s ability to deliver maximum torque from the vehicle acceleration start
provides significant benefits during the stop/start driving of urban traffic conditions, combining brisk acceleration from a standstill in near silence with class-leading acceleration under full throttle of 0-50 km/h in only 4 seconds.
The new Yaris Hybrid‟s seamless, E-CVT electric continuously variable transmission benefits from a new control system to create a more progressive engine rpm increase during vehicle acceleration. Optimised at 70-90% throttle opening, the new system suppresses excessive increases in engine rpm under acceleration, offering drivers a more natural-feeling, linear relationship between vehicle and engine speeds.
Supplementing this enhanced E-CVT transmission, two alternative „on-demand‟ drive modes
may be selected to further increase driving efficiency, performance and fuel economy. From start-up and at speeds up to 50 km/h the new Yaris Hybrid automatically operates in
EV mode, driving under electric motor power alone. The driver may also select EV mode manually. This unique driving mode is only available to drivers of full hybrid vehicles. With vehicle range dictated by battery charge, the EV drive mode allows for urban driving with minimal noise and zero CO, NO and PM emissions for up to two kilometres. Because 2x
the petrol engine is switched off throughout its operation, the EV drive mode contributes to a significant reduction in the Yaris Hybrid‟s overall fuel consumption.
In ECO mode, throttle response to aggressive accelerator pedal inputs is reduced and air-conditioning control optimized for improved fuel economy. Depending on driving conditions,
1the ECO mode can help drivers achieve about 10% reduction in fuel consumption versus
the normal mode.
Optimum Weight Distribution for Balanced Driveability The extensive use of high-tensile steel within the new Yaris Hybrid‟s construction not only saves weight, but also offers greater bodyshell rigidity for handling stability. Some 50% by weight of the body is formed in high-tensile steel, allowing for weight reduction with no loss of torsional stiffness.
With an unchanged 2,510 mm length wheelbase, the front overhang has been increased by just 20 mm to accommodate the downsized full hybrid powertrain. With both the fuel tank and the new, more compact hybrid battery located well within the vehicle wheelbase and as low as possible, the new Yaris Hybrid combines a particularly low, 550 mm centre of gravity with 63:37 front/rear weight distribution to deliver well-balanced driveability. Enhanced Aerodynamics for Class-leading Drag Coefficient Aerodynamic efficiency is fundamental to fuel efficiency, vehicle stability and quiet running, and every element of the new Yaris Hybrid‟s bodywork has been styled to optimise airflow and minimise drag.
Sized to optimise hybrid powertrain cooling, both upper and lower front grilles have been carefully shaped to both smooth and minimise the intake of air into the engine bay. The profiles of the front bumper aero corners, bonnet, steeply raked A pillar, door mirrors, roofline, rear spoiler, rear bumper aero corners, the rear combination lamps and even the wheels have all been designed to maximise the Yaris Hybrid‟s aerodynamic efficiency.
In addition, numerous underbody airflow rectification components have been adopted to create a flat surface, smoothing the flow of air under the new Yaris Hybrid. These include a front spoiler, a large engine undercover, and front, centre and rear spats. A rear undercover incorporates vertical fins which create a laminar flow effect to enhance ride stability. As a result, Toyota‟s new full hybrid boasts a class-leading drag coefficient of just Cd 0.286.
1 Internal test during winter time