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Breaker arm with contact points at the left. The pivot is on the right and the cam follower is in the middle of the breaker arm. A contact breaker (or "points") is a type of electrical switch, found in the ignition systems of spark-ignition internal combustion engines. The switch is automatically operated by a cam driven by the engine.
When the electrical circuit connected from the power source (e.g. the car's battery) to the primary winding is closed (by a contact breaker or transistor), current flows through the primary winding, which produces a magnetic field around the core. This current flow lasts for a period of time to build up energy in the coil.
A typical CDI module consists of a small transformer, a charging circuit, a triggering circuit and a main capacitor. First, the system voltage is raised to 250 to 600 volts by a power supply inside the CDI module. Then, the electric current flows to the charging circuit and charges the capacitor.
The breaker points (called "Contact breaker" in the figure) are an electrical switch opened and closed by a cam on the distributor shaft. This is timed so the points are closed for the majority of the engine cycle, allowing current to flow through the ignition coil, and are opened momentarily when a spark is desired.
Engine controls demand one of the highest real-time deadlines, as the engine itself is a very fast and complex part of the automobile. Of all the electronics in any car, the computing power of the engine control unit is the highest, typically a 32-bit processor. [citation needed] A modern car may have up to 100 ECU's and a commercial vehicle up ...
circuit breaker panel A distribution board for electric power that uses circuit breakers as protective elements. circuit breaker An automatically operated electrical switch that opens to interrupt a short circuit or other fault. circuit theory The mathematical theory of electrical circuits. Circuit Total Limitation (CTL)
A system basis chip (SBC) is an integrated circuit that includes various functions of automotive electronic control units (ECU) on a single die. [1] [2] It typically includes a mixture between digital standard functionality like communication bus interfaces and analog or power functionality, denoted as smart power.
A distribution board (also known as panelboard, circuit breaker panel, breaker panel, electric panel, fuse box or DB box) is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit breaker for each circuit in a common enclosure.