Although General Motors Corp. has earmarked larger-displacement engines for the initial applications of its Displacement on Demand (DoD) cylinder-deactivation technology, a GM executive suggests 4-cyl. engines also may be well-suited for the technology. Fritz Indra, GM executive director-advanced engineering, tells Ward’s that DoD-equipped 4-cyl. engines would be an excellent way for extending the higher fuel efficiency of DoD technology to a broader range of vehicles that do not use 6- or ...

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