The Effect Of Pressure Sensors On Diesel Generators

Jan. 28, 2022

Intake device is a necessary device for diesel generator.  Air intake inspection is a must for Euro iii, Euro IV and higher emission diesel generators.  That is to say, only by knowing the intake volume can we find the best duty cycle and exhaust emissions can reach the best state. The sensors in the intake system: the intake pressure sensor and the intake flow sensor, that is to say, the two sensors are to check and measure the intake volume.  

 

But the design structure of the two kinds of sensors is different, the operating principle is different, like the usual transport unit, long-distance unit, is generally used is the intake pressure sensor, diesel generator set is used by the intake flow sensor.  It can also be said that the current use of EGR cummins generator set waste recycling cummins generator set are using this sensor.  

 

So Cummins Generator starts with the intake pressure probe  

The intake pressure probe is usually assembled before the intake pipe of the supercharger. The work inspection is conducted to the high pressure gas road. Some places are called the mid-cooling pressure, some are called the branch pressure, and some are called the supercharging pressure.  It's all the same thing.  So what is the intake pressure of the normal Cummins generator set?  Or how much is the intake pressure normal, the normal condition of the 6 cylinder (rated speed of 2500 or so) is 120Kpa, to 3000 or higher 140Kpa;  Four cylinder machine rated 3000 is 130Kpa or so, to 4000 turn to 160Kpa, this is the highest speed of the empty unit, and the environmental pressure is the standard value.  

 

One thing to note here is that some inspection instrument test unit is Hpa, their conversion unit is 10Hpa=1Kpa, then Cummins generator company is talking about the intake pressure is insufficient there are two conditions: 1, the intake pressure is insufficient;  2, the intake pressure is lower than the atmospheric pressure.  


 The Effect Of Pressure Sensors On Diesel Generators


Cummins generator company first said that the intake pressure is insufficient, usually data flow display or inspection instrument has reported an accident atmospheric pressure is less than the normal intake pressure value, then cummins generator company should check the points?  The following points are summarized:  

 

Just should be greater than the atmospheric pressure is less than the normal intake pressure if the exhaust brake is damaged.  Euro4 SCR Cummins generator set urea catalytic box plug EGR Cummins generator set POC plug and so on, will cause the diesel generator set loading weak is often said boring, then Cummins generator company said the second intake pressure is lower than the atmospheric pressure, if the parameter flow shows that the recent pressure is lower than the atmospheric pressure of the environment,  In the case of standard atmospheric pressure Cummins generator set usually occurs 70Kpa pressure or even lower how to do, this Cummins generator set will even be seriously weak, then Cummins generator company will use the hand to eat the guy - inspection instrument and everyone's repair unit experience to check the intake pipeline,  Including the filters, piping, intercooling and intake manifolds just mentioned.  

 

Air intake temperature sensor, now common commercial units are the inlet pressure and inlet temperature probe combined, using electric system of diesel generating sets and some cummins generator set or in the case of split type, temperature of the inlet temperature sensor is to measure the temperature of the inlet in detail so as to determine the density of air intake, that is, the lower the inlet temperature shows that the higher the air density,  The higher the air intake, on the contrary, the higher the temperature, the less the air intake, then the unit naturally boring loading weakness, so the inlet temperature on the power of Cummins generator set can not be neglected.  

 

The normal inlet temperature of cummins generator set is 30-50 degrees, 50 degrees to Cummins oil generator set will appear power neutral condition, if the temperature of a unit is high he will stop protection.  When you look at the inlet temperature sensor if it is a cold unit, when you open the key, look at the parameter flow display, the normal should be consistent with the temperature of Cummins generator Company, if the deviation is very large, it means that the inlet temperature probe of Cummins generator company is broken;  If it is the heat unit inspection, let the unit start first when checking the inlet temperature probe. Because the temperature of the diesel generator in a static state will be transmitted to the probe of cummins generator Company, the parameters of Cummins generator Company will be inaccurate:  


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