Chevrolet Cruze goes on sale in the U.S. this month

When the 2011 Chevrolet Cruze goes on sale in the U.S. this month, it�s going to bring a whole new experience to the compact car segment, including a brand-new approach to fuel economy. The Cruze is expected to deliver a best-in-segment 40 mpg highway, and that comes courtesy of some impressive work on the part of Chevrolet engineers. For example, a unique variable-displacement oil pump rests under the hood of the Cruze, helping both reduce strain on the engine and increase fuel efficiency.

Here�s how it works: The pump features a pivoting control-chamber mechanism and sliding vanes that allow its displacement to be varied based on engine rpm. When the engine�s first warming up, or when its operating at high speeds, the pump�s displacement is reduced as compared to during other conditions.

�By lowering the volume of oil we reduce the amount of energy, or torque, required to pump the oil, without taking necessary lubrication away from the engine,� said Mike Katerberg, assistant chief engineer for the 1.4-liter engine used in the Cruze. �Reducing the torque demand reduces fuel consumption. It�s a simple, durable, maintenance-free design that we have used in our transmissions for years and more recently in our hybrid vehicles.�

It�s just another way Chevrolet is taking fuel-efficiency to the next level with the Cruze, which will also feature such technologies as variable valve timing and, on the Cruze Eco model, a unique grille-shutter system. The latter automatically opens or closes slats in the car�s grille to optimize engine cooling and aerodynamics based on driving conditions. Other efficiency enhancers for the Cruze Eco include 17-inch alloy wheels with ultra low-rolling resistance tires, as well as a comprehensive aero-oriented body-kit.

The bottom line on the all-new Chevrolet, according to Margaret Brooks, the brand�s marketing director for small cars: �Cruze delivers the amenities, quietness and roominess you expect in larger, more upscale vehicles with the fuel economy of a compact.�