DECREASING OF MOVABLE MASSES IN VALVE TIMING USING ROLLER TAPPET

Balancing 3D Models with Movable Masses

We present an algorithm to balance 3D printed models using movable embedded masses. As input, the user provides a 3D model together with the desired suspension, standing, and immersion objectives. Our technique then determines the placement and suitable sizing of a set of hollow capsules with embedded metallic spheres, leveraging the resulting multiple centers of mass to simultaneously satisfy ...

Emission Reduction Strategies for Small Single Cylinder Diesel Engine Using Valve Timing and Swirl Ratio

Small diesel engines are widely used for commercial vehicle and passenger car applications due to their higher torque requirements, fuel economy, and better thermal efficiency. These engines are exposed to different operating and environmental conditions and hence emissions from these engines are erratic. Strategies are required to enhance performance and reduce engine-out emissions considering...

Post-Layout Timing-Driven Cell Placement Using an Accurate Net Length Model with Movable Steiner Point

This paper presents a new algorithm for timingdriven cell placement using the notion of movable Steiner points that capture the net topology. The proposed algorithm improves the timing closure at the backend of the EDA design flow. Unlike conventional flows that perform placement and routing in two separate steps and use rough estimates of the net lengths during placement, our algorithm uses ac...

Timing of mitral valve surgery.

Mitral valve surgery has changed considerably in the past decades and is now indicated mostly for pure or predominant mitral regurgitation. This is the result of the regression of rheumatic disease, of the efficacy of mitral balloon valvuloplasty for mitral stenosis, and of the aging of the population with increasing degenerative or ischaemic disease causing mitral regurgitation. Mitral regurgi...

Timing of aortic valve surgery.