Engine Ignition and Fuel Systems Quiz

The ratio of air mass to fuel mass during combustion in an engine. It determines how much fuel is burned and affects engine performance and emissions.

An ideal mixture strength for maximum engine power, with 12 parts air to 1 part fuel by weight.

An engine condition where there is not enough oxygen to burn all the fuel completely, leading to wasted fuel and increased pollution.

An engine condition where there is too much oxygen and not enough fuel to burn completely, resulting in wasted fuel and potentially engine damage.

The electronic control unit (ECU) is the 'brain' of an electronically controlled fuel injection system. It monitors engine parameters like air intake, engine speed, and throttle position to determine the amount of fuel to inject for optimal performance and emissions.

Electromagnetic fuel injectors are used in electronic fuel injection systems. They are controlled by the ECU to precisely inject the correct amount of fuel into the engine cylinders during the intake stroke.

A more even and consistent ignition in the combustion chamber is achieved due to precise fuel injection timing and amount, optimizing the combustion process.

Electronic fuel injection systems offer various advantages over carburettors, including increased efficiency and reduced emissions. It also helps to atomize the fuel more effectively for optimized combustion.

A type of electronic fuel injection system that uses a single injector or pair of injectors mounted in a centrally located throttle body. It resembles a carburetor but lacks a fuel bowl float or metering jets. Fuel is sprayed directly into the throttle bore(s) by the injector(s).

A type of electronic fuel injection system that uses multiple injectors, one for each cylinder, allowing for more precise fuel delivery and better engine performance.

A sensor that measures the position of the crankshaft and the speed of the engine. This information is used to calculate the injection time, ignition timing, and RPM.

Sensors that measure the oxygen content in the exhaust gases. This helps determine if the air-fuel ratio is too rich or too lean, allowing for adjustments to optimize combustion.

A sensor that indicates to the ECU the precise amount of throttle opening at any given time.

An electromagnetic device that injects fuel directly into the engine's air stream. It is controlled by the ECU and acts as the fuel dispensing nozzle.

This system is used to control the minimum airflow during idle speed. It actuates directly onto the throttle plate, typically with a small electric motor.

Multipoint injection was designed to overcome the limitations of single point injection, by providing more precise control over fuel delivery to each cylinder.

A system where each cylinder has its own injector, delivering fuel directly into the intake manifold.

A sensor that measures the amount and speed of air flowing through the intake manifold.

A device that controls the amount of fuel injected into each cylinder.

A pipe that distributes fuel to each injector in a multipoint system.

A system where fuel is injected directly into the cylinder, improving combustion and reducing emissions.

A control valve that regulates the flow of exhaust gas back into the intake manifold, reducing NOx emissions.

A sensor that measures the oxygen levels in the exhaust, helping to adjust the air-fuel ratio for optimal performance.

A system that utilizes a fuel distributor to deliver fuel to each injector.

The process of generating a high-voltage spark to ignite the air-fuel mixture in an engine.

A type of ignition system that utilizes a rotating magnet to generate electricity for the spark.

The spark quality is poor at low engine speeds due to the low voltage generated by the magneto.

A type of ignition system that uses a coil to generate high voltage for the spark, powered by a battery.

The main circuit within the coil ignition system, consisting of the battery, ignition coil, contact breaker points, and condenser, all connected by low voltage wiring.

The part of the coil ignition system that breaks the circuit, creating a sudden change in current that induces high voltage in the secondary circuit.

The part of the coil ignition system that stores electrical energy and releases it when the contact breaker points open, boosting the voltage further.

The second circuit within the coil ignition system, carrying high voltage electricity from the coil to the spark plugs.

In electronic ignition systems, the armature acts as a switch, replacing the contact breaker points found in coil ignition systems, which is controlled by the Electronic Control Unit (ECU).

The electronic ignition system replaces the traditional coil ignition system. It offers benefits like improved ignition timing and efficiency, leading to better engine performance compared to older systems.

The Electronic Control Unit (ECU) is the brain of the electronic ignition system. It controls the timing of spark delivery and adjusts it based on factors like engine speed and load.

The distributor directs high-voltage current generated by the ignition coil to the spark plugs in the correct firing order, ensuring each cylinder ignites at the right time.

Like a conventional ignition system, the electronic ignition system also utilizes a spark plug which is what ignites the air-fuel mixture in the engine cylinder.

The primary circuit in an electronic ignition system is regulated by the ECU, while the secondary circuit remains similar to standard coil ignition systems.

The electronic ignition module, often referred to as the Electronic Control Unit (ECU), receives a signal from the pickup coil. It uses this signal to determine when to stop the current flow in the primary circuit of the ignition coil, which is then sent to the spark plug.

The pickup coil generates a signal that indicates the position of the crankshaft, which is then used by the ECU to determine the optimal timing for the ignition spark.

This ignition system uses one ignition coil per cylinder (or pair of cylinders) for direct voltage delivery to spark plugs, resulting in more efficient and accurate spark timing, and is also known as Direct Ignition System (DIS).

This electronic control unit (ICU) works in conjunction with the ECU to control the timing of the spark generated by the ignition coils in a Distributorless Ignition System.

In a Distributorless Ignition System, each ignition coil generates a high-voltage spark for a specific spark plug, eliminating the need for a distributor to distribute the spark.

This system incorporates an electronic ignition module, which controls the operation of the ignition coils and other components in the system.

An electronic ignition system uses a distributor to distribute the high-voltage signal from the ignition module to the spark plugs, while a Distributorless Ignition System eliminates this mechanical component for a more efficient and reliable design.

A distributor is a mechanical device that uses a rotating rotor to distribute the high-voltage signal from the ignition module to the correct spark plug, determining the ignition timing.

Unlike the electronic ignition system, which uses a single ignition coil, the Distributorless Ignition System utilizes individual coils for each spark plug, eliminating the need for a distributor and improving system efficiency and spark timing accuracy.

The Distributorless Ignition System utilizes electronic components instead of mechanical ones for increased reliability and reduced wear and tear, improving spark time accuracy and overall system efficiency.