Heaters engines do not work only in winter . . .

Grejači motora su ranije pomogla dizel the engine just the start, today have many other important tasks. Can be problematic ...

Heaters engines have appeared more than 100 years, a za dodatno grejanje u dizel motorima koriste se od 1920-ih. Od tada su prošli malu metamorfozu – u prošlosti su bile guste spirale, completely made of metal, today is the engine heater tank (least no more than 3 mm!), while the core and heating element made of ceramics. Over the years,, His role has also changed.

Grejači motora – nove funkcije

In times of simple diesel equipped with indirect fuel injection (eg. atria or swirl chamber), grejači su imale samo jedan zadatak – pomoć pri pokretanju pri niskim temperaturama. Diesel engine uses a phenomenon only of ignition of diesel fuel in the heated (komprimovan- compressed to 30-50 bar) air.

When it is cold outside, vazduh koji je usisan u cilindar mora se prvo zagrejati – inače se dizel ne može pokrenuti. And it was a long function preheat , or less before the introduction of the Euro 4 emission standards. Then we had to shorten the period after the Cold old, jer dizel tada oslobađa najviše otrovnih supstanci u atmosferu.

How to do it? Najlakši način – zagrevanjem vazduha u cilindru (but without exaggeration, because too high temperature combustion means too high emission of harmful nitrogen oxides ). Therefore, in modern cars, Heater bar works in three phases: pre, during and after a cold start engine, sve dok ne dostigne temperaturu koja osigurava relativno ekološke uslove za
combustion mixture.

Grejač motora pun elektronike

However, that's not all, because in the most advanced form, heater may, na primer, support ignition particulate filter, and in some vehicles can operate even after shutdown (!) – DPF filtar se ne sme previše ohladiti. In turn, između ostalih Beru i Siemens nude grejače motora opremljene senzorima pritiska. Thanks to this patent, Control Unit knows how to modify the pressure in the cylinder, and in this way optimizing the composition of the mixture. It should be as far as possible environmental. And that will in the event of a fault sometimes have deep to reach out into the pocket? Well ...

Grejač motora – kako prepoznati grešku?

When it comes to damage any of the heaters, with indirect injection diesel may have trouble starting at the temperature of +10 degrees Celsius, and it is hard to think of it as arctic conditions. Just one faulty heater is sufficient that the engine starts to shake and smoke from the exhaust pipe. In most cases, in such a situation, Heater light on the instrument board (ne zaboravite da to može ukazivati i na drugu grešku – mnogi dizel motori nemaju svetlo “check engine”, more is replaced lampom for heater).

In turn, modern common rail diesel engines seem more resistant to failures, because it can burn even a faulty heaters and the cold. However, This does not mean that it should be used in this way.

Grejač motora – problemi sa odvrtanjem

In the past, heaters are operated only during engine start, pa su propadali sporije. Too long a faulty heater driving results in the precipitation of the residue in the evaporator, i posle imate problem prilikom pokušaj odvijanja i zamene grejača. If you want to replace themselves, Be careful when strong resistance in the course of, bolje je obratite se mehaničaru

However, If the heater breaks during dismantling, You have two options: you must either remove the head (dearly!), or find a professional to remove the heater without dismantling the cylinder head. When selecting heaters, note, including the rated voltage (4,4 ili 11 V), temperaturu i vreme zagrevanja – nema greške! The necessary information can be found in the manual of your car or in the manufacturer's catalog heaters.

Modern ceramic heaters using ceramics instead of metal. Among them there are several types, for: Niski-days (4,4 V), quick start, temperature and high-pressure sensor fitted. Simply said, heater converts electrical energy into heat and warms the air sucked into the cylinders. Operating temperature range of a typical ceramic heater is 1000-1300 C must be achieved for 2-4 second!

Using the head with four valves per cylinder in diesel engines has led to the introduction of thin super-heater. reason? No space.