Valve timing is the regulation of the points in the combustion cycle, at which the valves are set to open and close. Since the valves require a finite period of time in which to open or close without abruptness, a slight lead-time is always necessary for proper operation. The design of the valve-operating cam provides for the smooth transition from one position to the other, while the cam setting determines the timing of the valve.

In a typical four-stroke engine, the inlet valve is set to open before TDC (top dead centre), towards the end o ....etc

[:=Read Full Message Here=:]

VARIABLE SPEED DC MOTOR DRIVE


DC MOTOR THEORY:
Inducing a Force on a Conductor.
There are two conditions which are necessary to produce a force on a conductor:
i. The conductor must be carrying current.
ii. The conductor must be within a magnetic field.
When these two conditions exist, a force will be applied to the conductor, which
will attempt to move the conductor in a direction perpendicular to the magnetic
field. This is the basic theory by which a ....etc

[:=Read Full Message Here=:]

Prepared by:
MUHAMMAD NASIRUDDIN MAHYUDDIN


Introduction

The first step is to determine tha control. The purpose of the control law is to allow us to assign a set of pole locations for the closed-loop system that will correspond to satisfactory dynamic response in terms of rise time and other measure of transient response.
Then, secondly, we show how to introduce the reference input with full-state feedback. We describe the process of finding the poles for good design. In the second step, If t ....etc

[:=Read Full Message Here=:]

Sir, I am JAGADISH a final year Mechanical Engineering student want to present a seminar on Intelligent-Variable valve Timing and lift Electronic Control(i-VTECH) engine. so please help me by uploading the information and PPT for the same. ....etc

[:=Read Full Message Here=:]

Abstract

A belt is a looped strip of flexible material, used to mechanically page link two or more rotating shafts.
They may be used as a source of motion, to efficiently transmit power, or to track relative movement. Belts are looped over pulleys.
In a two pulley system, the belt can either drive the pulleys in the same direction, or the belt may be crossed, so that the direction of the shafts is opposite.

For more information, please visit
http://srmuniv.acdownloads/belt_drive.ppt
....etc

[:=Read Full Message Here=:]

VVT-i, or Variable Valve Timing with intelligence, is an automobile variable valve timing technology developed by Toyota. The Toyota VVT-i system replaces the Toyota VVT offered starting in 1991 on the 4A-GE 20-Valve engine. The VVT system is a 2-stage hydraulically controlled cam phasing system.

VVT-i, introduced in 1996, varies the timing of the intake valves by adjusting the relationship between the camshaft drive (belt, scissor-gear or chain) and intake camshaft. Engine oil pressure is applied to an actuator to adjust the camshaft positi ....etc

[:=Read Full Message Here=:]

SYNOPSIS
Until recently, a manufacturer used one or more camshafts (plus some pushrods, lifters and rocker arms) to open and close an engine's valves. The camshaft/camshafts was turned by a timing chain that connected to the crankshaft. As engine rpm's rose and fell, the crankshaft and camshaft would turn faster or slower to keep valve timing relatively close to what was needed for engine operation. Unfortunately, the dynamics of airflow through a combustion chamber change radically between 2,000 rpm and ....etc

[:=Read Full Message Here=:]

we want about detail ppt and report ....etc

[:=Read Full Message Here=:]

hello,i dig your web site while searching for polaris gearing calculator about atv,it is for a scrambler 400 1999 full build with heavy mods,
i work and fine tune those thing for 20 years,here is my question:through the years i've tried many,many gearing combo,since the first stock set til now with new smaller tires.
i use the 2001 2x4 tranny for my scrammy,i want to put best power to the rear wheels using the stock clutchs (only parts differents are aftermarket like,weights,springs,helix...)the 01 tranny doesn't have the same gear ratio insi ....etc

[:=Read Full Message Here=:]

VTEC (standing for Variable valve Timing and lift Electronic Control) is a system developed by Honda to improve the combustion efficiency of its internal combustion engines throughout the RPM range. This was the first system of its kind and eventually led to different types of variable valve timing and lift control systems that were later designed by other manufacturers (VVTL-i from Toyota, VarioCam Plus from Porsche, and so on). It was invented by Honda's chief engine designer Kenichi Nagahiro. ....etc

[:=Read Full Message Here=:]