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#rubber #kidstv #abs What is the glow plug What is the preheating glow plug?

Glow Plug - What are the preheating spark plugs?
Since diesel fuel is compressed by burning air-fuel mixture, there is no spark plug. When the plunger enters the TRIP, the trapped air heats up and the sprayed fuel spontaneously burns into the air at very high temperatures (bursts).

However, when the diesel engine is cold, when the engine is cold, both the engine and the intake air are cold, the air-fuel mixture cannot heat up sufficiently at the end of the compression, and the engine does not start (or works too hard), so the diesel engines use glow plugs. This system is called preheating system.

For glow plug faults (See Glow Plug - Preheating Glow Malfunctions)

What is the task of the glow plug? (What is the pre-heating spark plug?)
The glow plugs (preheating spark plugs) used in diesel-engined vehicles are electrically operated resistors facing the combustion chamber in the form of rod ends. When the ignition is switched on, if the engine is cold, the argı click kız relay sound is heard and immediately activated, the glow plug warning light in the instrument panel lights up.

The glow plugs, which heat the combustion chambers, make the diesel engine cool during the first start-up. So the engine runs with only one starter. With the electric current given to the glow plugs, the resistance wires in the inner structure become hot, the tip of the glow plug facing the combustion chamber is red and it heats up to about 700-1000 degrees Celsius.

Thanks to the glow plugs, the diesel engine runs easily during the cold start, the exhaust emissions are reduced, the jerky operation is destroyed.

Preheating System Operation (Glow Plug Operation Principle)
The operating time of the glow plug will be extended or shortened depending on the coldness of the engine-air. The engine must not be started before the warning light goes off, it will not start, so cranking the long engine can also terminate your battery.

Parts of the preheating system include: ignition key, coolant temperature sensor, instrument panel glow plug warning lamp, glow plugs, control box (relay) and electronic control unit.
The engine control unit receives temperature information from the engine coolant sensor when the ignition key is turned. The heating time of the glow plugs according to the temperature value is determined by ecu. For example, when the engine water temperature is -5 degrees, the glow plug warning lamp goes out after 10 seconds, while at lower engine water temperature it may be longer. If the engine is warmer, this will shorten the temperature. The engine control unit manages the system by sending signals to the glow plugs and sending signals to the control box (relay).
After the preheating lamp goes out in the instrument panel, after starting the engine and starting the engine, current is given to the glow plugs for a short time, then the current is interrupted.
(self-adjusting rod type glow plug)

If the engine coolant temperature sensor fails, the engine control unit operates the glow plugs according to a fixed heating time stored in the memory. For example, 20 seconds.

What are the Glow Plug Types?

Metal glow plugs
Standard rod type glow plugs,
Quick start glow plugs,
-QGS rod type glow plugs (Quick Glow System), (Common type controlled by relay)
Self-adjusting rod type


Ceramic glow plugs (best performance ceramic type glow plug)

New generation diesel engines are injected directly into the combustion chamber, but with older generation engines, three types of combustion chambers are used in diesel engines. These are the pre-combustion chamber, turbulence chamber and direct injection. The location of the glow plugs depends on the design of the combustion chamber of the engine. The following illustrations show the positions of the glow plugs.

How does the glow plug work?

The diesel engine is a self-propelled engine, unlike the gasoline engine. The absorbed air is heated in the cylinders to a temperature of approx. 7500-900 ° C. Diesel engines therefore require a higher compression ratio (20-24) than gasoline engines and accordingly a more robust design. In order to ensure that the required temperature is reached under unfavorable conditions such as cold start or frost, additional heat must be transmitted to the combustion chamber.

The glow plug, in principle, also acts as an electric water heater. The electrical energy is passed through a glow resistor, which heats up violently (up to 1,000 ° C).

However, this simple principle has caused some difficulties in terms of practical longevity, overheating protection and current draw. In the 1960s, engine start-up processes therefore required periods of up to 30 seconds. This could be reduced to short run times of 3-5 seconds in the 1980s. External hot outside over 0 ° C with the introduction of TDI engines dizel buji ısıtmalı ya da rezistans ısıtmalı ford dealershi

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