2019 Toyota Corolla Sedan – Style, Fun and Performance. 2019 Toyota Corolla Sedan – Drive, Interior and Exterior. Subscribe.
The fourth generation 1.8 litre self-charging hybrid system develops 122 DIN hp/90 kW and 142 Nm of engine torque, with the added power of a 53 kW/600V electric motor which develops maximum torque of 163 Nm from zero rpm.
It fulfils all the requirements that customers have come to expect from a Toyota self-charging hybrid powertrain -quiet, intuitive, responsive and self-sufficient EV technology with no need for plug-in recharging. It offers low cost of ownership, outstanding fuel economy and low CO2emissions, and up to 50% all-electric driving on the everyday commute.
Its size and weight reduced to fit within the new GA-C platform without detriment to output or quietness, the four-cylinder, 1,797 cm3, DOHC, Atkinson Cycle engine benefits from numerous measures designed to improve fuel efficiency, enhance acceleration performance and reduce cabin noise.
Fuel efficiency has been improved through the reduction of friction, high tumble flow and optimum heat management. Friction reduction measures include a new piston skirt shape and its sliding part’s resin coating, the adoption of a spacer inside the cylinder block water jacket to suppress cylinder bore deformation, the use of low-friction valve train and chain drive components, and the optimisation of the crank and connection rod bearings.
High tumble flow has been achieved through the shape of the intake port and the piston, enhancing EGR (Exhaust Gas Recirculation) and improving combustion. A diagonal squish combustion chamber aligned with the spark plug angle improved anti-knock performance and fuel efficiency. The EGR (Exhaust Gas Recirculation) system valve has been enlarged to optimise gas flow, the intake manifold gas distribution structure has been optimised and EGR cooler heat exchange efficiency has been increased.
Heat management has been optimised by the adoption of a low flow type electric water pump, a division of the cooling path into two -one for the engine and the other for the heater, the installation of a Flow Shutting Valve (FSV) between the water outlet and EGR cooler to reduce coolant flow during engine warm up, the use of thin, long reach spark plugs, the shape of the combustion chamber water jacket and the promotion of high tumble flow.
Acceleration performance has been enhanced through the adoption of dual needle type spark plugs to improve ignition, and the adoption of a rectangular type ignition coil with high coil shape flexibility to reduce size and accommodate increased hybrid engine output.
Cabin noise has been reduced through the optimisation of the engine main body to achieve low vibration and noise, an amended engine mount position and shape, the adoption of a resin cylinder head cover which combines substantial weight reduction with superior NV (Noise and Vibration) performance, and a change in the shape of the exhaust system muffler.
The hybrid system features a smaller, lighter transaxle in which a new, dual axis structure adopted for the motor and generator achieves a low loss gear train with a smaller overall width. This parallel axis structure both increases the motor’s rotation speed and reduces its size.
The gear ratio has been optimised to promote maximum fuel efficiency and dynamic performance. Allied to gear tooth surface polishing, the new gear structure further suppresses resonance and operation noise, making the hybrid drive system quieter in operation than ever before.
The calibration of the hybrid drive system has been further refined. Greater torque from the electric motor provides a more linear rpm increase under acceleration. And the adoption of a new hybrid battery pack (Li-ion on Hatchback and Touring Sports, Ni-mH on Sedan) promotes even greater fuel economy.
Equipped with the 1.8 litre hybrid powertrain, performance figures for the Hatchback, Touring Sports and Sedan are 0 to 100 km/h in 10.9, 11.1 and 11.0 seconds respectively. All three variants have a maximum speed of 180 km/h.
The TNGA GA-C platformbrings considerable dynamic benefits to the new Corolla model range, as well as marked improvements to driver ergonomics and visibility.
The GA-C platform guarantees a more rewarding driving experience thanks to a centre of gravity that is lowered by 10 mm, a multi-link rear suspension fitted as standard across the model range, and a 60% more rigid body shell through the use of high strength steel as reinforcement in key areas.
All contribute to better handling and stability without compromising ride and comfort, as well as reducing high frequency vibration for an increased feeling of quality.