Cyaniding

A process of case hardening

Cycle

1. A vehicle with one or more wheels (usually Spoked) where the rider/Driver straddles the vehicle as a Bicycle, Motorcycle, Tricycle, etc. It also includes other vehicles adapted from a traditional cycle where the rider/driver no longer straddles the vehicle (recumbent cycle, four-wheel side-by-side pedal powered vehicle). Obviously the distinction blurs with automobiles -- are they a cycle?
2. A sequence of changes of state after which the system is in its original state again.
3. Series of events or operations which have tendency to repeat in the same order.
4. A type of pressure modulation during an ABS stop. Cycles include pressure hold, pressure release (decay) and pressure build

Also see

• Air Standard Cycle
• Bottoming Cycle
• Brayton Cycle
• Carnot Cycle
• City cycle
• Defrost Cycle
• Diesel cycle
• Drive Cycle
• Duty Cycle
• ECE Test Cycle
• Four-stroke cycle engine
• FTP Test Cycle
• Hand Cycle
• Hold Cycle
• Intermittent Cycle
• Intermittent Duty Cycle
• Mechanical Cycle
• Miller cycle
• Modulating Refrigeration Cycle
• Off Cycle
• Otto cycle
• Rankine Cycle
• Refrigeration cycle
• Two-stroke cycle
• Urban test cycle
• Working cycle

Cycle Audit

Process for ensuring that cyclists are safely catered for in new infrastructure provision.

Cycle car

A term used to describe the very light production automobile made prior to 1922. It was usually made from Motorcycle parts and generally powered by single-cylinder or twin-cylinder engine. They disappeared when genuine light cars appeared.

Cycle Defrost

See

• Reverse Cycle Defrost

Cycle engine

See

• Four-stroke cycle engine
• Rankine Cycle Engine
• Two-stroke cycle engine

Cycle Review

Process for identifying shortcoming in the cycle network.

Cycle route

See

• Segregated cycle route

Cycling

See

• Deep Cycling
• Short Cycling

Cycling clutch orifice tube

(CCOT) A GM system that uses an accumulator (instead of a receiver-drier). The system uses a fixed orifice tube located at the evaporator outlet, instead of an expansion valve. A thermostatic switch or a pressure sensing switch cycles compressor operation off and on in accordance with system status.

Cycling clutch system

Any system that controls compressor clutch operation as a means of temperature control

Cycling Switch

See

• Clutch Cycling Switch

Cyclist

A bicycle rider. A biker is a motorcycle rider.

Cycliste International

See

• Union Cycliste International

Cyclocomputer

Cyclocomputer

An instrument mounted on a bicycle to record speed, distance, and other functions. Often called just computer.

Cyclo-cross bike

A bicycle designed specifically for cyclo-cross racing, an event where lightweight bicycles that resemble road bikes are raced on an off-road course that includes sections where the rider must dismount and run with the bike; features include specific geometry, drop handlebars, knobby tires, and cantilever brakes

Cyclo-cross racing

An event where lightweight bicycles that resemble road bikes are raced on an off-road course that includes sections where the rider must dismount and run with the bike

Cyl

Abbreviation for Cylinder, as in 12-cyl. engine.

Cylinder

Cylinder

1. The round Chamber or hole in the Cylinder block that houses the Pistons and where Combustion takes place. Also called bore or barrel.
2. Any tube-like device.
3. A device which converts fluid power into linear mechanical force and motion. This usually consists of movable elements such as a piston and piston rod, plunger or ram, operating within a cylindrical bore.
4. A closed container for fluids.

Also see

• Acetylene cylinder
• Brake cylinder
• Brake master cylinder
• Cylinder bore
• Cylinder head
• Cylinder sequence
• Cylinder sleeve
• Dual Master Cylinder
• Flat Cylinders
• Inner cylinder
• Liquid-vapor Valve Refrigerant Cylinder
• Lock cylinder
• Master cylinder
• Oxygen cylinder
• Portable Service Cylinder
• Quick-take-up Master Cylinder
• Refrigerant Cylinder
• Single Master Cylinder
• Slave cylinder
• Tandem master cylinder
• Vacuum-powered Master Cylinder
• Wheel cylinder
• Working cylinder

Cylinder bank

One half of a V-6, V-8, V-12, and V-16 engines along one side.

Cylinder barrel

An external casing of a cylinder forming a separate unit, especially of an air-cooled engine

Cylinder block

Click image to supersize
Cylinder Block

The basic framework of the engine to which other engine parts are attached. It is usually a Casting and includes the engine cylinders and the upper part of the Crankcase.

Also see

• Engine block

Cylinder block heater

An electric heater element in the water jacket connected at the other end to house current. The element warms the coolant so that in very cold weather the block will not crack and the car will start easier. Often just called block heater.

Cylinder bore

The cylinder holes.

Cylinder charge

A quantity of fresh mixture fed into the combustion chamber prior to combustion

Cylinder head

Cylinder Head

The detachable metal (Aluminum or iron) plate or cap that is bolted to the top of the Cylinder block. It is used to Cover the tops of the cylinders, in many cases the cylinder head contains the valves, it also forms part of the Combustion chamber. It has water and oil passages for cooling and lubrication. It also holds the Spark plugs. On most engines a Valve cover or Rocker arm cover is located on top of the cylinder head. Some engines have just one cylinder head covering several cylinders, while others have separate heads for each cylinder. In some Motorcycle engines and small engines, the cylinder head is not detachable -- it is Cast with the cylinder which forms a blind hole.

Also see

• Crossflow cylinder head

Cylinder head bolt

One of several bolts which hold the cylinder head in place

Cylinder head gasket

See

• Head gasket

Cylinder head nut

One of several nuts which hold the cylinder head in place.

Cylinder head tester

A device used to detect cylinder head leakages which cause combustion gases to appear in the cooling system

Cylinder hone

1. A tool that uses an abrasive to smooth out (hone) and bring to exact measurements such things as engine cylinders, Wheel cylinders, Bushings, etc.
2. A rotating instrument fitted with abrasive material used to remove roughness and deposits, and to polish the bores of wheel cylinders and master cylinders.

Cylinder housing

The working part of the master cylinder housing that contains the piston bore and pistons.

Cylinder liner

1. A Cylinder sleeve.
2. A hard metal block forming the cylinder wall and in which the piston runs

Cylinder ports

Passages in the cylinder head, two for each cylinder--one to bring the air-fuel mix into the cylinder, the other to carry out burned exhaust gases

Cylinder Pushrod

See

• Master Cylinder Pushrod
• Wheel Cylinder Pushrod

Cylinder, refrigerant

Cylinder in which refrigerant is stored and dispensed. Color code painted on cylinder indicates kind of refrigerant.

Cylinder sensor

A device which picks up signals regarding the crankshaft angle and sends them to the ECU to determine engine speed.

Cylinder sequence

The order in which the cylinders are located on a vehicle. It is important to locate the number one cylinder to check and adjust Timing. In some cars it may be at the front of an engine on U.S. built cars and at the rear of some foreign cars.

Also see

• Firing order

Cylinder sleeve

A replaceable cylinder Liner or tube, it is made of a pipe-like section that is either pressed or pushed into the block. If the cylinder cannot be re-bored to an oversize or if the liner has been damaged beyond repair, the cylinder may be Re-sleeved.

Cylinder surfacing hone

Puts a cross-hatch pattern on the cylinder walls, after they have been bored, to help seat the new rings properly

Cylinder wall

The inner surface of a cylinder.

Cylindrical commutator

Commutator with contact surfaces parallel to the rotor shaft.

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