GM Reveals Direct Injection V6 Engine
With two manifold cylinder heads, the new engine eliminates the problem of gasket failure since each integrated exhaust manifold cylinder head replaces a cast iron exhaust manifold, six bolts, a gasket and a heat shield and three bolts. And the change reduces engine weight by 13 lbs or six kg per engine which helps to improve fuel economy.
The new cylinder heads decrease the overall width of the engine by 4.6 inches (117 mm) for more packaging space in the engine bay making underhood work easier. Due to less surface area, the new design contributes to a one decibel reduction in engine.
GM claims that intake airflow is improved by seven percent with the use of larger intake valves (38.3 mm v. 36.9 mm), which are responsible for an increase of 11 horsepower. Exhaust flow is 10 percent better than the previous V6 engine as GM made extensive simulation and bench testing for perfect cylinder-head airflow.
In April 2011, GM has invested $100m to add 30 jobs and purchase tooling and equipment to make future automotive components at its GM Components Holdings Rochester Operations.
With its global headquarters in Detroit, automaker GM employs 209,000 people in every major region of the world and does business in more than 120 countries. GM and with its strategic partners produce cars and trucks in 31 countries.
Ameer Haider, assistant chief engineer for V6 engines at GM, said: â€œReducing engine mass of this magnitude doesnâ€™t happen often. Engineering usually looks for reduction in terms of grams not pounds. Itâ€™s just like removing a set of golf clubs from your car when you donâ€™t need them - ultimately it saves fuel.
â€œWhen combined with other mass reductions, the customer will see better fuel economy over time with better performance.â€
Will the move enhance sales of GM?
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