Diagnóstico e teste de injetores Common Rail - Quintas Automotivas

8 Hello everyone, welcome, but an automotive Thursday program, in this framework that we have here, which we call automotive chat, today the objective is to answer some of the questions that came to our channel, all directed to the topic of ejectors, camon drives Basically they are asking how the injectors and camera are

diagn

osed, so nothing better than having here a guy with a lot of experience in electronic systems, he is in the field working a little, thanks for the invitation and several years working at the manufacturer of trams,

diagn

osis, analysis on the internet, there is a lot of advice, there is a lot of information that should not be explored here in today's programs, basically we are going to talk about three big steps to diagnose the sector. , make an electronic measurement, nothing more, nothing less, put a scale on the system, have a reading of working values, but that is the vision of electronics so we will make a measurement of the electrical signal, which is different, they go directly to the component, we will continue analyzing the electronic electrical behavior of the director and finally we will do a hydraulic measurement in the case of the injector placed in what would be an engine in the functional resume of the return quantity, but for this there is nothing better than having here a resource that we have in the training center, which is a data bank, has all the functioning of a system until it dies, let's prepare it for measurement and talk a little about itself. , three big steps are Diagnosis of the tumor is extremely important and you help me look for a house, much more practical, ok, we are here to measure with a scale, but it seemed to you that it raised a little that this equipment is a calamity that we use in the training part.

It is complete here, there is a high pressure pump, a feed pump, the kingdom getors, all the sensors are here and this panel is all electronic, so there is a penalty for each of the sensors and actuators, one unit of electronic control and a diagnostic socket to use with a scanner to be able to make the measurements and show you the diagnostic stage, we are talking about something, it took a while to start executing the exhibition bench that is being carried out with the dogs, It is important to remember that each school works and behaves in a different way, each brand has a different way, what we are showing here brings to mind the errors, delete memories, real values ​​from other functional tests, please, and 441 examples here just so that We can understand how the engine behaves, it is very important for us to know what rotation is correct according to the fuel specification and this also helps a lot when diagnosing if it is working correctly.

I have a bad impression that the injector works and sometimes it can be the pump that is generating low pressure 38 mega pascals means that our river is working So, with 380 bar for an idle, which we are checking here, it is ideal in this case the simulator has an air mass Not all vehicles have a street air mass and an engine temperature of 88° at idle to where our next test will be done, so I'll go back and we'll choose a personal one. Here we compare quantities for us, this is one of the essential tests, it is one of the most important that we can do with the injector installed in the vehicle, so that we can understand what the real operation of the manager is like, he asks us.

If the engine is running at idle and it already has the working temperature at idle and here you see that it is comparing the amount of driving between the first second third quarter of a liter to what we observe is that the volumes are 100% static and are changing - 2,145 minus 45 always changing in our case we are working with new injectors that are good and fully operational so these changes here are not bringing great variety the flight cell changing very frequently was or is stable very quickly and then we have to have careful we are seeing 4,522 4,514 in the head putting 4.2.1 in another case now the question that is important for the diagnosis which is correct It is always important that this information is fresh and exceeds the volume of fuel electronics, he is always making this correction, We do not have a functioning as perfect as the one we find daily here, the manual is already open, the course comparisons, the quantity can progress here, very good, so here Diego is telling us very clearly what is the value that we must find during the test it says that an increase in debits of up to five more cubic millimeters is allowed for every five grams case management but this same value can be adopted 5 values ​​between 64 and a half and another four and a half here the technique for us that receives the highest then I can get it very low it is part of the calculation that the control unit makes with the mechanical system of the engine then it takes the national vote and the phase makes all these calculations to say how much is added or removed, very good, so we already saw the reference value, here it is in the manual, tolerance - 5, let's start, so now we also propose it in the diagnosis, well guys, now we have the second, actually we leave this electronic unit to interpret the processed data ​Now it is very different with equipment with the motors directly measuring the signal in the ejector, physically the measurement is done for this, we put a clamp on it, a 30 clamp, the current that the projector is consuming can be measured by induction and also with a needle we are asking attention the assembly of the injector is important the work with a needle we always say always put it on the back of the connection without drilling the wiring to open it generation of rubber that has to avoid any type of humidity interference that you have after collecting electrical good this is already working we are not measuring the signal and injected now by maurício it will interpret a little I will order the team there to freeze the measurements and let's say that you observe the south screen according to the channel the first channel on the left side pay attention to the red color down here on the time scale basically the electric current the consumption of electric current after a mobilization of this current and the course passes again because it has pre and administration and it has main administration, so here it is said a lot volume better of injected fuel and here a larger volume of fuel is injected right after we have the current pulse, the voltage comes right behind in real life, this here comes a little later again. high value oscilloscope like taking a photo of an event that happened in 2000 seconds and looking at everything that happened in 2001 according to a main projection that includes the detail that uses a certain amount of current to open an injector, prides itself on the booster, then that this current drops, you see the current drops, so you don't need as much current for a while April to keep the needle open and this is the time of the main injection, on the other hand, in the column it is also about behavior electric through abstention.

So you can ask yourself everything is very nice but with this image here how can I diagnose that the objective of today's program is basically that you have to have the information as we saw there walnut cana that they have the manuals also the manuals for the heads of the graph patterns of electrical behavior to compare something else that can be done compare a cylinder 1 achieving 34 the content and behavior pattern of this injector client and if there is any electrical disturbance that will appear the signal will be different, all this is possible through direct measurement , we can also achieve this, maybe create a new program with more time, capture all the suspects and measurements, we can, with a frozen image, see the values ​​of each one over time. , the intention and in the operation, although each of these peaks is valid, but basically it is the second step, with this second step we close the electronic side, the injector now needs to see the hydraulic behavior, let's prepare for the hydraulic behavior, we will prepare the voice, beauty, we will install it here, but just by turning it a little bit, the characteristics of the injector because it is impossible to measure this way, the personal legal return, this tool can only be used. on the market you have the return connection here on the upper side, this zinc connection, so we have a large volume of vehicles in operation, there is this possibility.

Here we can use this model of tools, they are basically connecting 4 hoses on one side of another. The analysis of the completely different model is completely different, we will get it, let's see what can happen more than the other. It's good to work on this today, so now you can see that the first one is our fourth, it has a much lower speed, take advantage of it. being on our second in a row, which means in practice a deficiency in the performance of this manager, a larger volume than the others, now I can create factory values ​​very quickly, it is actually much faster, it is great for this type of location and also level to have a better objective view but here it is already seen as we speak, look, this manager could really be number two, he already has a difference that is worth observing and it is already significant, I think it is clear that it can happen A little later because the return can happen now that we have left, we are going to tell you a little about why there is an increase in the return volume in the injectors because what we need is that tool. to make this identification and when this happens we have prepared here an illustrative image so that we can better understand this situation, in this case the third generation uses the same way that works today with this valve system, so they are basically calibrated, the which allows the oil to enter the assembly and then I have to wait for the oil to come out as well, so what functional balance do I have of this dimension manager, this being another microscopic one, practically certain it was just because of the curious fact? that for us the manager today is manufactured with the tolerance of one micron, a grain of sand has three to four microns in diameter, so we make components today that are very sensitive to time, we can say that the dust is larger than the specification that here we work to manufacture, it usually happens here, I can have since it will stop being round and will not bring effectiveness, it will remain square, it will have an organization, this happens because I have pressure fluctuations in the river, is it because I have a supply deficiency or because The poor quality fuel ran into the sphere and then it will bring this is the decency of the sealing and the contamination that I hear a lot about fuel contamination, contamination is something very present.

For us today, today what we have the most problems in the technical guarantee analyzes is Brazil, also for the organic material, so here I prepared it to bring you this is an example, this here is an organic contamination, this here is a degraded fuel , so today Use it here in Brazil and since it is now organic matter, a vehicle also has a useful life and when it dies, this matter solidifies and generates this here, so all this organic matter here is not welcome in our system of injection, is not beneficial. for the injectors it ends up entering through the wine holes and also how does it matter bigger than that unb to what I said it brings compound the abrasives and just made the injectors you can also notice that I have spokes this is the valve we were talking about at the beginning and we have a factory, is it possible that we have this image of the eye of the world? is it possible to see this? the sphere itself before it is so small that it can no longer be seen. item wearing glasses, work gloves sometimes. looking with a magnifying glass through the fight because it is very difficult to see the other problem I found a lot of water due to time and temperature and water in most of our programs with the same conclusion how to avoid this preventive maintenance is no longer a secret everything points to the same

common

factor the name but today's program and I think that in some way it managed to achieve our goal I did not want to show and respond to your requests in previous programs such as We made a diagnosis for a chamber injector and we hugged everyone because we understood that it was It is important to talk about sectors, that does not mean that in the future we cannot expand and invite Maurício once again to participate in our automotive yard, thank you very much Maurício for your participation. and contribution day, without a doubt I thank you for the invitation and for the opportunity, it always had to be a pleasure to have the fifth one come out, if you have any additional questions, we can leave them, of course, in the next program, I come to talk a little more about the analysis of failures we can have you without any problem very good and if you liked the program do not forget to subscribe to our channel send comments tips that we can contribute on the day. to everyday life that you repair between cars thanks until next time thanks