camshaft

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camshaft

Engineering a shaft having one or more cams attached to it, esp one used to operate the valves of an internal-combustion engine

Camshaft

 

a distributing shaft of a machine; a shaft with cams that impart motion to the separate mechanisms of the machine in a given sequence. For example, in internal combustion engines the camshaft allows opening and closing of the valves at the proper times; in fuel pumps the plungers are worked by cam action. Camshafts are stamped from steel or cast from high-strength cast iron. Camshaft cams and journals are hardened to a Rockwell C hardness of 53–62, after which they are ground and polished.


Camshaft

 

the part in the timing mechanism of a machine, instrument, or apparatus that ensures a definite order in the execution of functions and the cyclic recurrence of the operation. In internal-combustion engines, a camshaft is part of the valve-timing system and has a specified number of cams, which corresponds to the number of cylinders. It is rotated by a connecting mechanism from the crankshaft so that the operation of the valves and pistons is coordinated. In various automatic machines, camshafts are part of the control systems of production and operating processes that conform to a specified program. Programs can be changed by using replaceable camshafts corresponding to the appropriate operating cycle, or by using camshafts wih cams that can be moved along the shaft or turned to a certain angle, thus changing the eccentricity.

camshaft

[′kam‚shaft]
(mechanical engineering)
A rotating shaft to which a cam is attached.

camshaft

camshaftclick for a larger image
A straight, gear-driven shaft that contains lobes used to operate the intake and exhaust valves of a reciprocating engine. The camshaft is geared to the crankshaft in such a way that valves close and open at the correct time relative to the position of the piston in the cylinders.
References in periodicals archive ?
Being constructed at Presta Camshafts Chemnitz production plant, the building work of the new facility is planned to be concluded by the end of this year.
The camshaft is clamped between centers and rotated as it is lowered through the inductor.
The camshafts act directly on the self-adjusting hydraulic tappets that actuate the valves.
Ford's product engineers were able to get an acoustical signature of the noise and determined that it was caused by microscopic roughness (chatter) on the engine's camshaft lobes caused by imperfections introduced in the lobe grinding process.
As part of its Duratec engine program, Ford-Cleveland is currently producing camshafts in combination for both 2.
Keywords in this release: automotive electronics technologies, North America, 42-volt, 42-V, in-car computing, electric window motors, steering column, steering linage, drive-by-wire, push rods, camshafts, 'idle stop', heated steering wheels, adaptive cruise control, collision avoidance, haptics, vision sensors
The RFN 300 machine produces lobes with a concave shape for the camshaft shown.
KPP and ASIMCO began their business relationship in 2002, when ASIMCO approached KPP about a partnership to acquire Federal Mogul Corporation's camshaft manufacturing business, based in Grand Haven, Mich.
Previously, the engines had flat tappet camshafts made Of cast iron, and lobes were ground in a hardened condition.
Built on a new state-of-the-art line at the engine assembly plant, the design of the Endurance V8 features an aluminum engine block with cast iron cylinder liners, chain-driven dual overhead camshafts with silent single-stage timing chain, microfinished forged steel crankshaft and camshaft, molybdenum-coated pistons and electronic drive-by-wire throttle for precise control.
Wheel changes are about every 700 camshafts, with the machine alerting the operator on the cycles remaining before the wheel needs changing.