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Automotive Intelligence - the web for automotive professionals and car enthusiasts |
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September 17, 2008 This Week:
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Dual VVT-i (Variable Valve Timing with intelligence) controls valve timing on both the intake and exhaust camshafts to help optimize performance and economy. Internal components are optimized to reduce friction, and valve-train components are downsized to provide a compact valve layout.
A five-speed manual transmission is standard with the 1.8-liter engine, and a four-speed automatic Electronically Controlled Transmission (ECT) is available. Both automatics use a torque converter with flex lockup for increased fuel efficiency. Uphill/downhill shift control selects the proper gear for conditions and helps provide moderate engine braking during downhill driving. The five-speed automatic can be manually shifted by moving the shift lever to the left from its “D” position into the “S” position, then pushing forward for upshifts and back for downshifts. An indicator inside the combination gauge shows the gear selected. The Matrix XRS features the 2.4-liter four-cylinder engine. Every engine part was changed to reduce friction, increase output and ensure smooth, quiet operation. The 2.4-liter produces 158 hp at 6,000 rpm and 162 lb-ft of torque at 4,000 rpm. A balance shaft suppresses vibration, and oil jets to help piston cooling. The exhaust system is engineered for reduced backpressure for improved performance. Photos: Toyota (Sept. 17, 2008)
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