CONTACT BREAKER Meaning and
Definition
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A contact breaker refers to an essential component in the ignition system of a gasoline engine that regulates the flow of electrical current to the spark plugs. Primarily used in older automotive systems, it comprises a set of points that open and close, creating interruptions in the electrical circuit. When closed, these points allow current to flow from the ignition coil to a distributor, which then delivers the desired amount of current to the appropriate spark plug, igniting the air fuel mixture in the cylinder.
The contact breaker works in conjunction with a rotating cam, typically driven by the engine's camshaft, which moves the points in a controlled manner. As the cam rotates, it pushes against a lever connected to the points, causing them to separate. This breaking of contact momentarily interrupts the current and creates a high voltage in the ignition coil secondary winding. When the cam's lobe slopes away, the points return to their closed position, reestablishing the current flow.
The purpose of the contact breaker is to precisely time the spark in each cylinder, coordinating it with the engine's rotation and piston position. This synchronization is vital for optimal engine performance, as it allows for efficient combustion and power delivery. While newer automotive systems employ electronic ignition techniques, the contact breaker played a crucial role in the early days of internal combustion engines.
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Interrupter, a device for rapidly opening and closing an electrical circuit.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for CONTACT BREAKER
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Etymology of CONTACT BREAKER
The term "contact breaker" is primarily used in relation to old-style ignition systems in internal combustion engines. The etymology of this term lies in its functionality and structure.
The word "contact" refers to the physical touching or connection between two objects or surfaces. In an ignition system, the contact breaker refers to the mechanical device that makes and breaks an electrical connection, controlling the flow of current to the spark plugs in a specific sequence.
The term "breaker" originates from the action of breaking or interrupting the flow of current. The contact breaker is specifically designed to open and close an electrical circuit, creating a series of interruptions that generate the necessary spark for ignition.
Therefore, the term "contact breaker" is a descriptive compound word that accurately represents the primary function and purpose of this component in an ignition system.
