Nissan Motor Company’s New 2.0 Liter Four-Cylinder Gasoline Engine 820113

A new 2.0 liter 4-cylinder gasoline engine has been designed and developed for light weight front-wheel drive vehicles.
In developing this new engine, the major target was to improve fuel economy, and this was achieved by minimizing the engine weight, reducing mechanical friction loss and improving combustion efficiency. Major problems that had to be solved included assuring the durability of component parts, and reducing the noise and vibration caused by minimizing the weight of the engine structure.
The basic concept of the Nissan NAPS-Z engine, which is fast burn combustion with a two-point ignition system, has been used and further improved in the new engine.
To develop this new engine, all component parts were newly designed using computer design analysis techniques, and thecked by extensive testing.
This paper describes the design characteristics of the basic engine components and structures, and discusses the significant development factors.


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