I want information about the vehicles which are using vva mechanism and about bench market and about project and how we approch to enchance engine Performance and Emission Requirement ....etc

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A gate valve is a valve that opens by lifting a round or rectangular gate out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar. The gate faces can form a wedge shape or they can be parallel. Gate valves are sometimes used for regulating flow, but many are not suited for that purpose, having been designed to be fully opened or closed. When fully open, the typical gate valve has no obstruction in the flow path, resulting in very low friction loss.


Gate valves are cha ....etc

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रक्तापेक्षा अश्रू श्रेष्ठ
असतात,
कारण ?????
शरीराला जखम झाली,
तर रक्त बाहेर येते .....
पण ?????
अश्रू ला बाहेर येण्यासाठी,
मनाला जखमी व्हावे
लागते :'(.... ....etc

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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

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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

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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

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ENGINE ASSEMBLY & CYLINDER-HEAD VALVE LEAKAGE


INTRODUCTION

Honda is the world's largest manufacturer of motorcycles as well as the
world's largest manufacturer of internal combustion engines.

Honda surpassed Nissan in 2001 to become the second-largest Japanese automobile manufacturer.

Honda is the sixth largest automobile manufacturer in the world.

Honda’s Net Sales and Other Operating Revenue over Asia is ¥1,236,757.


ENGINE ASSEMB ....etc

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A Butterfly valve is a type of flow control device, used to make a fluid start or stop flowing through a section of pipe. The valve is similar in operation to a ball valve. A flat circular plate is positioned in the center of the pipe. The plate has a rod through it connected to a handle on the outside of the valve. Rotating the handle turns the plate either parallel or perpendicular to the flow of water, shutting off the flow. It is a very robust and reliable design. However, unlike the ball valve, the plate does not rotate out of the flow of ....etc

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The present day requirement for high performance from a medium power engine has resulted in generally higher maximum crank shaft speeds, typically in the region 5500 ? 6000 rpm. This can be explained by recalling the factors governing the power output of an engine since, if neither piston displacement nor mean effective pressure can be further increased. Then the only other way to raise the maximum power is to permit higher crank shaft speeds. For this reason it becomes increasingly more important to avoid erratic operation of valves. As a resu ....etc

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A ball valve (like the butterfly valve, one of a family of valves called quarter turn valves) is a valve that opens by turning a handle attached to a ball inside the valve. The ball has a hole, or port, through the middle so that when the port is in line with both ends of the valve, flow will occur. When the valve is closed, the hole is perpendicular to the ends of the valve, and flow is blocked. The handle position lets you 'see' the valve's position.

Ball valves are durable and usually work to achieve perfect shutoff even after years of di ....etc

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