Theme resource reduction of engine oil overheating raised us in the "race" No. 9 2010 г. ("the heat, the cold"), provoked by the carriers question: "how to determine whether the seat to overheat?"
No driver will admit to the boss himself, that in the long lift he "boils" diesel: it is easier for a chauffeur, but not for the owner of the car. After all, the resource of the engine oil, especially if it is on mineral basis, is reduced even by the short-term overheating of the engine. That is, the further work of the engine on such oil will lead to increased wear of the engine. This will already hit the pocket of the owner of the car. That is, the appearance of a chauffeur with a pure confession reduces financial losses. What if the non-acquainted chauffeur isn't turning himself in? To do this, it is sufficient to make sure that the machine does not display an error when the machine is released to the line or during a post-test examination. If the DEA was operating at a temperature above the acceptable temperature (even short), the overheating information is displayed as an error code. As a rule, it is not recommended, or even prohibited, to move the car further, as it could lead to serious breakdowns in the engine. Opinions Alexander Zalogen, technical specialist of Scania Rus Company-All engines have a full-stream oil heat exchanger installed, so the engine oil temperature (at least at the position of the sensor) is close to the temperature of the coolant. The engine oil temperature sensor, which is reciprocally incorporated with the oil pressure sensor, is installed as an option mainly on the on-board engines. The data in the control unit can be used to determine the duration of the engine in different temperature ranges. When the engine overheat occurs, a fault code that can be used to determine the date when the engine has been reheated and the engine operating modes at the moment of overheating and other information (only about 100 parameters). The most commonly used heat is the contamination between the heat sink and the intercooler. Until 2007, there were breakdowns of the electromagnetic valve in the fan system of the engine cooling system. When the engine temperature approaches critical values, the control unit reduces the power, which in most cases prevents the engine from breaking down. Opinions Andrej Avmonov, specialist of service department at work with key clients of Iveko Russia LLC-The working temperature of diesel engines installed on the majority of the tractors and dump trucks is 110 +-5 degrees Celsius. In peak and hot weather conditions, the temperature may reach 120 degrees (this is the maximum allowed temperature!), which is not critical for the operation of the engine in this mode for a short time-a few minutes. If the temperature continues to rise, the electronic engine control unit will reduce the power of the diesel engine, which will lead to a fall in its operating temperature. All the Iveco cars have sensors that monitor not only the engine, but all machines. The electronic control unit of the DMU has a memory that records all variations in the operation of the powertrain: excess of the allowed speed and over-temperature of the motor, excessive speed, temperature of the air, oil, fuel, exhaust gas, oil pressure, fuel, etc. All data are read through diagnostic equipment from the dealer. It is not in vain to control the engine temperature, including motor oil, the diesel engine has a whole system (!) of different sensors, the information from which is supplied to the central engine control module. Any fact that the temperature is exceeded is stored in the on-board computer memory and, when serviced by the manufacturer, the technical service technician, by connecting the scanner to the service outlet, considers the error codes (failures) and issues recommendations to the repairmen. What if the machine doesn't have a control processor? Motor vehicles with motor TPD' s that meet the Euro 0, Euro 1 and even Euro 2 standards are still in operation. They will simply have no "brains" in memory of which there will be a record of deflection in the work of the engine. Alas, but in this case, only the "confession" of the driver works. One thing: "Brainless" machines forever and ever go back. Opinion of Oleg Petrov, technical director of Renault Trucks-The working temperature of the motor oil of most of the diesel engines of Renault Trucks Company is within 100 ° C. When this threshold is exceeded on the instrument panel, a warning pictogram is set. The readings of the current working temperature of the engine oil do not appear on the instrument panel. Thus, if the warning indicator on the panel is not lit, the engine oil temperature is normal. Engine overheating and variation of other engine operating parameters (temperature and pressure of oil, coolant, lower levels below the minimum, critically low intake air temperature, etc.) Record and store in the on-board memory of the vehicle. To read the accumulated information of the registered engine or vehicle deviation (so-called "dated events") to the diagnostic connector of the car, you must connect the scanner (computer) with the company software. The deviations shall be recorded according to the following parameters: the type of deviation and its value (e.g. low engine oil pressure: 0.3 bar); the date of the deviation (for example, 13. 10. (2010); the mileage of the vehicle in which the deviation was recorded (e.g. 123,864.8 km); mileage (e.g. 12 km 600 m); operation time (e.g., 10 min 48 c). Thus, the repair service shall receive complete information on the time of the malfunction, the mileage on which it occurred, during which time and the mileage of the vehicle worked with the malfunction. The same applies to facts, even short-term, engine operating temperatures. Any excess of the operating temperature above 107 degrees Celsius is recorded by the sensors and stored in memory of the central processing unit. Main causes of engine cooling of the engine cooling system: The filling of the radiator from the inside and from the outside as well as the "mosquito" of the grid; the low cooling fluid level, the cooling (the formation of the air traffic) in the cooling system; the application of the coolant that does not meet the requirements of the engine manufacturer, the operation of the engine at which the engine has been exhausted; the discharge valve of the expansion tank does not provide the required pressure (0.7 bar) in the engine cooling system; The installation of the insulation (ponds or often simply cardboard) is tight in front of the radiator to limit the radiator that is passing through the radiator, which is strictly prohibited on the turnobodyss with intermediate cooling of the air; the incorrect operation of the fan unit (hydraulic fluid or electromagnetic muff); leak coolant; a faulty thermostat, a failed water pump. Air-pressure system: external clogging of hundredth interstuller; significant leak of intercultution or one of the air supply piping; turbocharger failure; air filter clogged. Fuel system: deterioration or failure of the fuel system components (depending on the type of fuel system: TTD, TNAD, injector, pump-rooms); incorrect installation of fuel injection opening. Engine lubrication system: low oil level, disproportionately low oil pressure relative to engine speed. Factors associated with the operation of a motor vehicle: overloading of a vehicle; operation in the mountains; operation in hot clims; errors in driving (e.g. wrong gear selection). Other: incorrect adjustment of the valve thermal failure conditions; malfunctioning of the exhaust gas damp system, deformation of the exhaust pipe, deafening of the exhaust/catalyst). In general, most of the above reasons are directly related to the lack of respect for the frequency of maintenance of the vehicle, as well as to the banal ageing of the vehicle.