|Toyota Auris. Click to enlarge.|
Following on its introduction late last year of the Toyota Optimal Drive 1.33-liter Dual VVT-i engine with Stop & Start (earlier post), the Toyota Auris is now gaining the new 1.6-liter Valvematic gasoline engine and revised versions of the 1.4 and 2.0 D-4D and 2.2 D-CAT 180 diesel units.
Toyota launched the Auris—a strategic compact passenger vehicle for both Japan and Europe—in Japan in 2006 and Europe in 2007. (Earlier post.) Since its debut, it has become one of Toyota’s top models. Cumulative sales in Europe reached 318,236 units by the end of 2008.
1.6L Valvematic. Toyota expects the new 1.6-liter Valvematic engine, built at Deeside in the UK, to be the largest-selling unit in the 2009 Auris range. It benefits from Toyota Optimal Drive technologies, notably variable valve lift, enabling it to deliver more power and torque than the previous 1.6 VVT-i engine, while at the same time making significant improvements in fuel consumption and emissions levels.
Power is up 6% to 131 bhp (98 kW) from 123 bhp (92 kW) in the 1.6 VVT-i, torque increases 2% to 160 N·m (118 lb-ft) from 157 N·m (116 lb-ft), while combined cycle fuel consumption drops up to 10% from 6.9 L/100km to 6.2 L/100km (38 mpg US) in the new 1.6L Valvematic, with CO2 emissions down by up to 9% to 146 g/km.
Revised 1.4-liter and 2.0-liter D-4D. The 89 bhp (66 kW) 1.4 D-4D diesel engine has been upgraded with Toyota Optimal Drive technology, with fuel economy increasing by up to 6% in combined cycle driving. Carbon dioxide emissions have been reduced, falling from 132 to 125 g/km for manual TR models, 127 g/km for versions with MultiMode. At the same time, torque performance is stronger by 8%, rising to a maximum 205 N·m (151 lb-ft) between 1,800 and 2,800 rpm.
As well as delivering CO2 emissions that are among the best in Auris’s segment, the engine is more responsive. This has been made possible by new piezo-electric injectors that control fuel volume and injection timing more accurately and give a shorter injection time.
The 2.0 D-4D engine in Auris gains a diesel particulate filter (DPF), which brings emissions performance in line with Euro V standards. It delivers 125 bhp (93 kW) and maximum torque of 310 N·m (228 lb-ft) between 1,800 and 2,400 rpm via a six-speed manual transmission. CO2 emissions are reduced by 13 g/km to 138 g/km and fuel consumption is reduced by up to 8.8% to 5.2 L/100km (45 mpg US) on the European combined cycle.
The engine benefits from higher fuel injection pressure of 2,000 bar and more efficient piezo injectors with smaller holes for a finer spray. Combined with an optimized combustion chamber shape, this allows for an improved fuel-air mixture and more efficient combustion, contributing to better fuel economy and improved torque at low engine speeds.
Revised 2.2-liter D-CAT 180. Applying Toyota Optimal Drive technology to the 2.2 D-CAT 180 diesel engine, featured exclusively on the SR180 grade, has yielded better fuel economy and emissions. Combined cycle performance is 6.0 L/100km (39 mpg US) and CO2 output is 158 g/km, against previous figures of 6.2 L/100km (38 mpg US) and 164 g/km. Like the 2.0 D-4D engine, it also benefits from improved piezo-electric fuel injectors, operating at higher pressure—increased from 1,800 to 2,000 bar.