How does the Chevrolet Cruze hit 40 miles to the gallon without the help of a hybrid powertrain?
According to the Official Chevrolet Press Release:
The oil pump in the engine of the 2011 Chevrolet Cruze takes a laid-back approach to its work, delivering the precise amount of oil needed during all driving conditions.
That requires the engine to work less versus a conventional pump and ultimately saves fuel. A standard feature in the Cruze's Ecotec 1.4L turbocharged engine, the variable displacement oil pump reduces the displacement during engine warm up and high speed conditions.
The volume of oil from the pump varies with rpm by changing the pump's displacement through a pivoting control chamber mechanism and sliding vanes. A fixed displacement pump would typically bypass the extra oil internally. The Ecotec 1.4L turbo is standard on Eco, LT and LTZ models and helps the Cruze Eco, with a standard six-speed transmission, achieve an expected segment-leading estimated 40 mpg on the highway.
The benefits of the variable displacement oil pump increase when used with other technologies such as variable valve timing which operate using oil pressure. Variable valve timing adjusts the engine valves' opening and closing timing for optimal performance, fuel efficiency and emissions across the rpm band - including greater low-rpm torque.
The all-new 2011 Chevrolet Cruze will begin arriving in U.S. dealerships this September, starting at $16,995, including destination.
Source: www.prnewswire.com
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