How are sensors used in an engine control system?
Figure 6.1 is a representative block diagram of a typical electronic engine control system illustrating most of the relevant sensors used for engine control. The position of the throttle plate, sensed by the throttle position sensor (TPS), directly regulates the air flow into the engine, thereby controlling output power.
What happens when you turn off the ignition?
When the vehicle’s ignition system triggering switch turns off the power to the ignition coil, the magnetic field collapses. As it does, the secondary winding captures the collapsing magnetic field from the primary winding and converts it into 15,000 to 25,000 volts.
How does the secondary winding of the ignition system work?
As it does, the secondary winding captures the collapsing magnetic field from the primary winding and converts it into 15,000 to 25,000 volts. It then supplies this voltage to the spark plug, thereby creating a combustion in the engine’s combustion chamber, thus creating energy to start and run your vehicle’s engine.
How does the ignition system in a car work?
To achieve such a huge surge in voltage, the ignition systems in all cars, except diesel-powered models, use an ignition coil consisting of two coils of wire wrapped around an iron core, known as the primary winding and the secondary winding. The ignition coil acts as an electrical power transformer.
How are engine sensors used in engine management system?
Furthermore, the engine sensors provide the Engine Management System with vital data parameters in real-time. These engine sensors continuously monitor the engine parameters. They also provide the ECU with changes that occur in the data from time to time.
How can I Turn Off both fuel and ignition?
On some engines the only easy way to turn off both fuel and ignition is to pull the fuse for the PCM. The engine control computer is usually called the Powertrain Control Module or PCM. Disconnect any fuse to the PCM as a last resort and be sure to check for codes first.
How are engine sensors used in the ECU?
These engine sensors continuously monitor the engine parameters. They also provide the ECU with changes that occur in the data from time to time. Based on these inputs, the ECU re-calculates the correct air-fuel ratio and ignition timing.
How can I tell if my ignition system is disabled?
To verify the ignition system is disabled, unhook only one spark plug wire and connect a spark tester to that plug wire, and to a good engine ground. Then crank the engine. If you see sparks at the tester, or the engine starts, your ignition system is not disabled.