Heading up the petrol engine line-up is a brand new power unit, the 1.6-litre Dual VVT-i which builds on the advanced technology of the current ToyotaVVT-i range. Dual VVT-i stands for Toyota’s unique system of independent cam shaftvariation for both, intake and exhaust timing using one electro-hydraulic variation system for each of the cam shafts.
The 1.6-litre Dual VVT-i is a four cylinder, 1598 cc engine which develops 91 kW (124 hp DIN) at 6,000 rpm and peak torque of 157 Nm at 5,200 rpm. However, the excellent torque characteristicsof this engine mean a remarkable flat torque curve –above 140 Nm from 2,000 rpm to 6,000 rpm. In real world driving this means smooth, powerful acceleration from low engine speeds and excellent top-end power.
At the same time, the Dual VVT-i technology offers excellent fuel consumption and reduced levels of harmful emissions. The new Corolla 1.6 Dual VVT-i will achieve 6.9 l/1 00km on the
European combined fuel cycle and yet still delivers sparking performance. Top speed is 195 km/h and acceleration to 100 km/h (with five speed manual gearbox) takes just 10.4 seconds.
The 1.6-litre Dual VVT-i engine is a compact, light weight unit designed to deliver high performance, low fuel consumption and low noise levels. The overall size and weight of the unit has been reduced through a series of measures including integrating the water pump and oil passage into the front of the engine, adopting a resin-type inlet manifold and optimising the timing chain layout.
In addition, extensive use of Computer-Assisted Engineering (CAE) has reduced the weight of the reciprocating parts and increased the rigidity of the engine block structure.
The innovative Dual VVT-i technology continually varies the timing overlap of the inlet and exhaust valves to optimise combustion pressures under a wide range of engine loads. This results in increased torque at low and medium engine speeds withincreased power output at higher engine speeds. At the same time, Dual VVT-i offersbetter fuel economy and lower emissions.
The Dual VVT-i system uses hydraulic pressure, controlled by the main engine computer, to continually vary the phase of both the intake and exhaust camshafts. Apart from the variable timing, the system means that valve liftcan also be increased resulting in greater power output.
Other technical advances for the 1 .6-litre dual VVT-i reduce frictional losses and boost performance. A roller rocker arm system is used to reduce friction between the camshaft and the sliding parts. Oil-pressure activated rush adjusters mean valve clearance needs no maintenance.
Low tension piston rings, an offset crankshaftand optimised intake port all further contribute to excellent low friction and reduced fuel consumption.
Economical, smooth 1 .4 VVT-i C
To complement the power and technology of the new 1 .6 Dual VVT-i, the new Corolla is also available with the popular 1.4 VVT-i engine, carried over from the current model.
In its latest development, this smooth and economical engine develops 71 kW (97 hp DIN) at 6,000 rpm. Maximum torque is 1 30 Nm at 4,400 rpm. This is sufficient to give the Corolla a top speed of 170 km/h and acceleration to 100 km/h in 13.0 seconds.
The 1.4-litre VVT-i is especially economical and ideal for city driving with its smooth torque output and low noise levels. On the combined European fuel economy standard it returns 6.7 l/100km.
The 1.4-litre VVT-i meets Euro IV emissions standards thanks to the fitment of an exhaust manifold catalytic converter to further clean exhaust gases.
High performance D-4D 125
Lightweight, aluminium block diesel
Balance of power and fuel consumption
Available with self-cleaning particle filter
Innovation continues with the availability of a new diesel engine to the Corolla range; the latest generation 2.0 D-4D125. This remarkable engine is at the heart of Toyota’s diesel growth strategy in Europe and offers both increased driving pleasure through high power output and excellent fuel economy.
Installed in the new Corolla, the D-4D125 equipped with Oxydation Catalytic Converter (Cco) develops a maximum 93 kW (126 hp DIN) with a constant torque output of 300 Nm from 2,000 to 2,800 rpm (with DPFfrom 1,800 to 2,400 rpm). This gives the new Corolla D-4D 125 outstanding mid-range in-gear performance for maximum driving pleasure under real world conditions.
Typical performance figures for the Corolla D-4D 125 reveal a top speed of 200 km/h and 0 to 100 km/h acceleration (with six speed manual gearbox) in 10.3 seconds. Yet this sparkling performance is achieved with excellent fuel consumption, recording 5.3 l/100km with CCoon the combined European cycle (5.7 l/km with DPF).
The 2.0-litre D-4D125 engine is based on the same block and uses the same highly successful technology as the advanced 2.2-litre D-4Dengines in the Toyota range. But it benefits from reduced weight and reduced engine capacity,which results in improved fuel efficiency.
The engine block and cylinder head are all aluminium but the piston stroke has been reduced to 86 mm to achieve the smaller capacity. The piston bowl has been redesigned to accommodate the shorter stroke and also to compensate for any reduction in swirl effect, which could lead to less efficient fuel burning.
A key feature of the new generation D-4Denginesis their low compression ratio, which helps reduce noise and improves engine efficiency. The 2.0 D-4D125 operates at a ratio of 16.8:1 which is remarkable for a power output of this level.
The 2.0 D-4D125 uses the latest generation, high pressure common rail diesel system which operates up-to 1,700 bar. Engine efficiency is further boosted with a high performance Variable Nozzle Turbocharger (VNT) which has been developed to react quickly to throttle inputs. This helps to compensate for the reduced compression ratio and helps eliminate any sense of ‘turbo-lag’.
The Corolla D-4D125 is also an important development in the Toyota Clean Power strategy to reduce harmful emissions. In selected markets, the D-4D125 will be available with a Diesel Particulate Filter (DPF) which not only purifieshydrocarbons (HC) and carbon monoxide (CO) like conventional catalysts but also enable simultaneous reduction of particulate matter. The DPFis ‘self-cleaning’and requires no long term maintenance.
For maximum economy combined with smooth city driving, the new Corolla is also available with the successful 1 .4-litre D-4Ddiesel which is carried over from the current model range.
This light weight engine was the first all-aluminium diesel in the world and still delivers a remarkable balance of easy driving and economy. This engine develops 66 kW (90 hp DIN) at 3,800rpm and 190 Nm of torque between 1,800 rpm and 3,000 rpm.
In the new Corolla the 1.4 D-4Dwill achieve and outstanding fuel economy of 4.9 l/100km. But, thanks to itslight weight and excellent power delivery, this is not at the expense of performance. The 1.4 D-4DCorolla has a top speed of 175 km/h and will accelerate to 100 km/h (with five speed manual gearbox) in 12.0 seconds.
Exciting driving pleasure is enhanced on the new Corolla with the choice of transmissions, each carefully matched to suit the characteristics of the engine output.
A conventional five-speed manual gearbox was fine-tuned to match the smaller engine range and is available on both petrol engines and the 1.4-litre D-4Dwhile the high performance D-4D125 is available with a six speed manual. These manual gearboxes are light and compact, with gear ratios chosen to deliver a balance of exceptional power performance and good fuel economy.
The shiftfeel is optimised by precise engineering of major components and friction losses are reduced through the use of low viscosity gear oil and low resistance bearings. Noise levels are suppressed through rigid casing design, a third gearbox mount point and high precision gears.
Drivers wanting a more relaxed driving style can choose the latest development of the MultiMode transmission with steering wheel-mounted paddle shift. This offers either automatic or manual gear changing and is available with either the 1.6-litre VVT-i petrol or the 1.4-litre D-4D.
In manual mode, the gear shifts are made either by sequential shiftof gear lever or by
the paddle shifts on the steering wheel. The paddle shifts can also be used to override the automatic gear selection for temporary driving in manual mode.
Fuel economy with the MultiMode transmission is excellent thanks to the optimised control system and highly efficient direct gearing, without resorting to a torque adapter.
All manual transmissions will be equipped with the
Gear ShiftIndicator. This feature indicates to the driver when to shiftgear up or down for optimal environmental performance. The system takes into account the driving conditions, including the level that the accelerator pedal is pressed and the vehicle speed. The Gear ShiftIndicator may result in 5% fuel consumption reduction compared to normal gear shifting but the potential of improvement is, of course, dependent in general on the driver’s personal driving habits.
All-new suspension for maximum stability
Excellent driver control and involvement
Precise, responsive steering
Chief engineer, Toshi Ezaki wanted the new Corolla to give drivers more “excitement and delight”without affecting its worldwide reputation for ease of use and driving comfort. There has been a new focus on driver involvement with improved stability, responsive handling and precise steering control based on the car’s all-new platform.
The newly-developed, compact and
highly rigid front suspension is an L-arm MacPherson strut which brings the suspension strut in-board of the wheel hub to improve noise and vibration suppression. At the same time, the MacPherson strut design ensures superior straight line stabilityand excellent steering response.
The suspension geometry has been optimised with careful attention to the positioning of the lower arm, the camber angle, caster angle and king-pin inclinations. The lightweight anti-roll bar has ball-joint mountings to the strut casing and bushes embedded in the suspension member to ensure consistent rigidityand a highly efficient layout.
At the rear,
the new torsion beam suspension accommodates the vehicle packaging while also contributing to handling, stability and ride comfort. The suspension layout, with optimised settings throughout, separates the coil spring and damper while allowing a wider track for the cargo area.
The torsion beam suspension and newly-designed slanted trailing bushes allow precise control of camber and toe changes in response to lateral forces. Excellent stability is achieved in straight line driving while toe-in during cornering ensures good handling and a secure feel.
To achieve good steering response and a positive driving experience, wheel and tyre sizes have been increased to 15”and 16”, while the newly adopted
Electric Power Steering (EPS) is precise and responsive; reacting without delay to driver input.
The steering ratio (2.9 turns lock-to-lock) and degree of EPS control (variable according to vehicle speed) have been optimised to provide excellent feedback and driver control.
The EPS contributes to fuel economy by consuming power only when steering force assistance is needed and is also more environmentally friendly because the system does not require hydraulic fluid. The compact, high output motor and torque sensor are built into the steering column, providing direct steering assistance for enhanced feel.
Chief engineer, Toshi Ezaki, concludes: “Iam confident the driving pleasure and excellent performance of the new Corolla can be enjoyed in town, on high speed roads and out on the open highway.”
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