Search Results

The Ford Zetec-E engine primary drive system generation will be presented. The Zetec-E engine has been developed for a high volume production. The engines are produced in three engine plants with an installation capacity of 1.2 Mill. engines p.a. This paper describes the design features for the timing belt drive concept of the Ford Zetec-E engine family. The first engine was launched in January 1992 at Bridgend Wales (UK) and other plants are located in Cologne, Germany and Chihuahua, Mexico. The continuous improvement of the timing belt drives as well as the vehicle installation and packaging requirements for the world wide Ford power trains led us to the latest upgrade generation for MY 1999. In depth a technical view is taken into the different timing belt concepts, with idlers and various tensioning systems. The influence of a valve train with variable camshaft timing and none VCT applications will be evaluated.

A flexible concept for fully continuous variable cam timing (VCT) is presented. The system has been introduced in volume production for both intake and exhaust phasing applications. This paper describes the concept of VCT, the adaptation to an existing engine design and presents functional performance data. A special look is taken to the VCT function during engine start up. Here the requirements for intake phasing system (IPS) and exhaust phasing system (EPS) are significantly different.