Continuous-Camiotee Phasing: An Advanced Valve-Tirning Approach

VARIABLE-VALVE TIMING ALLOWS for controlled scheduling of valve-timing events. When applied to spark-ignition engines, it yields improvements in emissions, economy, and performance. The benefits for diesel engines further include: improved starting, noise reduction, and the ability to vary compression ratios. A camlobe-phasing system which takes advantage of the merits of variable-valve timing has been developed. Some advantages of this advanced valve-timing approach are:

1. 1.
   continuous control over valve-timing events,
2. 2.
   independent control over valve opening and closing times, and
3. 3.
   its application to engines with single-or twin-camshaft arrangements.