- Japanese automaker Mitsubishi has improved the MIVEC valve timing system in its latest four-cylinder gasoline engine, resulting in a 12-percent improvement in fuel economy with no loss of performance.
- Mitsubishi introduced the new 4J10 engine, a 16-valve SOHC 1.8-liter four-cylinder unit, this week in the Japan-market RVR compact crossover.
- The 4J10 engine, which replaces the 4B10 twin-cam 1.8 engine, makes 137 horsepower and 127 pound-feet of torque.
TOKYO — Japanese automaker Mitsubishi has improved the MIVEC valve timing system in its latest four-cylinder gasoline engine, resulting in a 12-percent improvement in fuel economy with no loss of performance.
Mitsubishi introduced the new 4J10 engine, a 16-valve SOHC 1.8-liter four-cylinder unit, this week in the Japan-market RVR compact crossover (which is sold in some overseas markets as the ASX and the Outlander Sport). The engine also will be launched next week in the home-market Galant Fortis sport sedan (Lancer or Lancer EX in some markets) and Galant Fortis Sportback (Lancer Sportback in some markets).
The 4J10 engine, which replaces the 4B10 twin-cam 1.8 engine, makes 137 horsepower and 127 pound-feet of torque.
The next-generation MIVEC system that's been installed on the new 4J10 engine combines elements of the previous MIVEC systems, varying valve opening timing on a continuous basis while switching between different valve lifts and valve opening durations according to engine speed.
The result, according to Mitsubishi, is an improvement in fuel economy and a reduction in CO2 emissions without any loss in engine performance.
Inside Line says: It doesn't sound nearly as sexy as Mazda's Skyactiv system, but impressive nonetheless.
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greenpony says:
09:20 AM, 10/21/2011
How do continuously-variable valvetrains work?