TOKYO — With the recent launch of the Bluebird “Sylphy,” Nissan Motor Co. Ltd. also unleashed its new ‘QR’ engine series, which features a compact balance system that substantially cuts vibration and noise. The system, developed jointly by Nissan and Unisia Jecs Corp., a Nissan affiliate, will be fitted on all future 4-cyl. engines with displacements of between 2L and 2.5L, both with direct injection (DI) and standard port injection types. The 2L unit for the Bluebird Sylphy is the ...

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