Camshaft Timing Drive Analysis for a Winston Cup Race Engine

1996 ◽  
Author(s):  
Christopher M. Spock
Keyword(s):  
Timing Drive ◽  
Race Engine

Power loss reduction in timing chain drives by adjusted tensioning and surface structuring

2019 ◽  
Vol 71 (8) ◽  
pp. 997-1002
Author(s):  
Bernd Sauer ◽  
Frederik Krupp ◽  
Andre Becker
Keyword(s):  
Research Centre ◽  
German Research Foundation ◽  
Content Type ◽  
Negative Results ◽  
Timing Drive ◽  
Power Loss Reduction ◽  
Multi Body ◽  
The University ◽  
Chain Drives ◽  
Priority Program

Purpose Energy losses in a timing chain drives are caused by friction in chain-rail contacts. To improve the efficiency, the Chair of Machine Elements and Transmission Technology at the University of Kaiserslautern developed various experimental and simulative analysis tools as a part of the German Research Foundation (DFG)-funded 1551 priority program and the DFG Collaborative Research Centre CRC 926. With these tools, various approaches for improving the efficiency were investigated. This paper aims to illustrate the approaches and present the results achieved within the framework of the above-mentioned priority program. Design/methodology/approach A towed cylinder head test rig is used for efficiency tests on timing chain drives. In addition to the experiments, a multi-body simulation model of the timing drive was developed and used. Findings It was possible to find positive approaches to reduce friction power by adapting the chain tensioning force as required. This was ensured for both the stationary operating points and the transient operating processes. An efficiency improvement of up to 10 per cent could be detected. Furthermore, a possibility was found to improve the frictional power by a targeted lubrication of the chain-rail contact. Here, the efficiency could be improved by 5-6 per cent. In addition, various structures were examined on a microscopic and macroscopic level. Neutral to negative results were achieved here. Originality/value This paper makes a contribution to improve the energy efficiency of timing chain drives. Different approaches have been investigated and evaluated.

Analysis and Research of Dynamic Characteristics of Synchronous Belt of a Diesel Using Multi-Body Dynamics

2011 ◽  
Vol 97-98 ◽  
pp. 721-725
Author(s):  
Yi Min Li ◽  
Zhi Yong Hao ◽  
Jin Li
Keyword(s):  
Dynamic Characteristics ◽  
Great Influence ◽  
Dynamic Tension ◽  
Timing Drive ◽  
Body Dynamics ◽  
Timing System ◽  
Speed Fluctuation ◽  
The One ◽  
Transversal Vibrations ◽  
Multi Body

The dynamic tension of synchronous belt and pulleys forces are obtained by analyzing the dynamic characteristics of timing drive system of a diesel based on muti-body dynamics. The effects of crankshaft speed fluctuation and other excitations on the dynamics characteristics of synchronous belt are illustrated. After the analysis, it is found that crankshaft speed fluctuation has a great influence on the linear and transversal vibrations of synchronous belt. Comparing the simulation results of the original timing system and the one optimized, it is found that the modal frequency of synchronous belt depends on its span. Therefore it is important to control the span of belt and arrange the tensioner pulley properly for timing system design.

3D-CFD Virtual Engine Test Bench of a 1.6 Liter Turbo-Charged GDI-Race-Engine with Focus on Fuel Injection

2013 ◽  
Vol 6 (3) ◽  
pp. 1834-1845 ◽  
Author(s):  
Marco Chiodi ◽  
Antonella Perrone ◽  
Paolo Roberti ◽  
Michael Bargende ◽  
Alessandro Ferrari ◽  
...  
Keyword(s):  
Test Bench ◽  
Fuel Injection ◽  
Engine Test ◽  
Engine Test Bench ◽  
Race Engine

Development of the timing drive and Lanchester drive of the DaimlerChrysler 4-cylinder engine M271

MTZ worldwide ◽  
2003 ◽  
Vol 64 (7-8) ◽  
pp. 14-17
Author(s):  
Peter Bauer ◽  
Klaus Bruchner
Keyword(s):  
Timing Drive

Spec Race Engine Preparation Techniques

2004 ◽  
Author(s):  
Rudolf H. Stanglmaier
Keyword(s):  
Preparation Techniques ◽  
Race Engine

Race Engine Development Shifts Gear

MTZ worldwide ◽  
2017 ◽  
Vol 78 (2) ◽  
pp. 82-82
Author(s):  
Mario Illien
Keyword(s):  
Engine Development ◽  
Race Engine

scholarly journals Motor control by precisely timed spike patterns

2017 ◽  
Vol 114 (5) ◽  
pp. 1171-1176 ◽  
Author(s):  
Kyle H. Srivastava ◽  
Caroline M. Holmes ◽  
Michiel Vellema ◽  
Andrea R. Pack ◽  
Coen P. H. Elemans ◽  
...  
Keyword(s):  
Brain Function ◽  
Action Potentials ◽  
Fundamental Problem ◽  
Motor Units ◽  
Spike Timing ◽  
Time Interval ◽  
Additional Information ◽  
Timing Drive ◽  
Spike Patterns ◽  
Individual Motor

A fundamental problem in neuroscience is understanding how sequences of action potentials (“spikes”) encode information about sensory signals and motor outputs. Although traditional theories assume that this information is conveyed by the total number of spikes fired within a specified time interval (spike rate), recent studies have shown that additional information is carried by the millisecond-scale timing patterns of action potentials (spike timing). However, it is unknown whether or how subtle differences in spike timing drive differences in perception or behavior, leaving it unclear whether the information in spike timing actually plays a role in brain function. By examining the activity of individual motor units (the muscle fibers innervated by a single motor neuron) and manipulating patterns of activation of these neurons, we provide both correlative and causal evidence that the nervous system uses millisecond-scale variations in the timing of spikes within multispike patterns to control a vertebrate behavior—namely, respiration in the Bengalese finch, a songbird. These findings suggest that a fundamental assumption of current theories of motor coding requires revision.

scholarly journals Investigations of the Friction Losses of Different Engine Concepts. Part 1: A Combined Approach for Applying Subassembly-Resolved Friction Loss Analysis on a Modern Passenger-Car Diesel Engine

Lubricants ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 39 ◽  
Author(s):  
Christoph Knauder ◽  
Hannes Allmaier ◽  
David E. Sander ◽  
Theodor Sams
Keyword(s):  
Diesel Engine ◽  
Reduction Potential ◽  
Journal Bearing ◽  
Friction Reduction ◽  
Valve Train ◽  
Friction Loss ◽  
Loss Analysis ◽  
Piston Group ◽  
Timing Drive ◽  
Crankshaft Journal

This work presents the application of a combined approach to investigate the friction losses in a modern four-cylinder passenger-car diesel engine. The approach connects the results from engine friction measurements using the indication method and the results from journal-bearing simulations. The utilization of the method enables a subassembly-resolved friction loss analysis that yields the losses of the piston group, crankshaft journal bearings, and valve train (including the timing drive and crankshaft seals). The engine and engine subassembly friction losses are investigated over the full speed and load range, covering more than 120 engine operation points at different engine media supply temperatures ranging from 70 to 110 ∘ C. The subsequently decreasing lubricant viscosity due to higher engine media supply temperatures allow for the identification of friction reduction potentials as well as possible risks due to an onset of mixed lubrication. Furthermore, additional strip-tests have been conducted to determine the friction losses of the crankshaft radial lip seals, the timing drive, and the crankshaft journal bearings, thus enabling a verification of the calculated journal-bearing friction losses with measurement results. For the investigated diesel engine, a friction reduction potential of up to 21% could be determined when increasing the engine media supply temperature from 70 to 110 ∘ C, at engine speeds higher than n = 1500 rpm and part load operating conditions. At low engine speeds and high load operations, the friction loss reduction potential is considerably decreased and below 8%, indicating mixed lubrication regimes at the piston group and valve train.

Ecotec 2.0 Liter Race Engine

2002 ◽  
Author(s):  
Russell D. O'Blenes ◽  
Stephen G. Bothwell
Keyword(s):  
Race Engine
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