What is the impact of too large or too small the fuel supply advance angle of diesel engine on the p

As follows:

1. The advance angle of fuel supply is too small, the fuel in the gas cylinder of the jet is too late, and a part of the fuel is separated or discharged with the exhaust gas before it has time to form a combustible mixture, and the fuel discharged with the exhaust gas is surrounded by high-temperature gas and continues to decompose, which becomes black smoke discharge. If the oil supply advance angle is too small, the diesel engine will overheat, the engine temperature will rise, and even the parts may be burned.

2. The oil supply advance angle is too large, the fuel is sprayed into the cylinder too early, the pressure and temperature in the cylinder are low, the fuel can not be burned, when the piston cylinder reaches a certain temperature, the combustible mixture is burned almost at the same time, and the diesel fuel that continues to spray people is surrounded by the exhaust gas formed by the combustion gas, and the oxygen cannot be met, and the combustible mixture cannot be formed.

This part of the fuel is separated into hydrogen and carbon black under the action of high temperatures.

With the exhaust gas, black smoke is formed. The oil supply advance angle is too large, due to the short fuel combustion time, the accumulated oil volume, the pressure in the cylinder rises at a large rate, often accompanied by the phenomenon of knocking the cylinder, and the diesel engine works roughly.

Diesel engines work by converting thermal energy into mechanical energy after fuel combustion.

Those who do external work. The fuel is supplied by the fuel injection pump, and the fuel is injected into the cylinder combustion chamber by the fuel injector, and the time when the fuel is injected into the cylinder or the fuel injection pump is supplied with strict requirements, and the fuel injection pump must start to supply oil at a certain time before the compression top dead center, so that after the fuel is injected into the cylinder, it can be fully mixed with the air for combustion, and the combustion pressure reaches the maximum value at a certain time after the top dead center.

However, it is very difficult to check the fuel injection advance angle on the diesel engine, and the fuel supply advance angle is usually used instead of the fuel injection advance angle for inspection and adjustment, that is, the moment when the high-pressure oil pipe of the fuel injection pump plunger begins to supply fuel. The feed advance angle is measured by the angle of rotation of the crankshaft before compression top dead center.

The diesel engine has high requirements for the accuracy of the fuel supply advance angle of the fuel injection pump, and the oil supply advance angle is too large or too small, which will lead to the failure of the diesel engine to work normally, and the failure phenomenon such as weak work, difficult starting, exhaust smoke, and excessive engine temperature will occur.

1. The influence of the oil supply advance angle on the performance of the diesel engine: due to the late fuel supply time, the fuel can not be burned quickly near the top dead center, which increases the fuel consumption of the diesel engine, increases the exhaust temperature, makes the noise high, and reduces the power, economy and reliability of the diesel engine due to the heavy thermal load of the diesel engine piston, cylinder liner, valve, cylinder head and other zero and components.

Features: High combustion noise, black smoke from the exhaust pipe.

2. The influence of excessive fuel supply advance angle on the performance of diesel engine: due to the early oil supply time, the diesel engine will be difficult to start, and the combustion will be coarse, which will cause greater noise and power decline of the diesel engine, and the reliability of the diesel engine will be reduced due to the high working temperature of the diesel engine piston, valve, cylinder head, cylinder liner and other parts and components.

Features: The diesel engine exhaust pipe and the cylinder head cover are added to the oil port to rhythmically emit white smoke. Diesel engines are noisy to combustion.

What is the impact of too large or too small oil supply advance angle of diesel engine on diesel engine performance? What are the characteristics?

1. The influence of the oil supply advance angle is too small on the performance of the diesel engine: due to the late fuel supply time, the fuel can not be burned quickly near the top dead center, which increases the fuel consumption of the diesel engine, increases the exhaust temperature, and makes the noise high, and the diesel engine has a heavy thermal load of zero and component components such as the diesel engine's piston, cylinder liner, valve, cylinder head, etc., which reduces the dynamics, economic training and reliability of the diesel engine. Features:

There is a lot of burning noise, and black smoke comes from the exhaust pipe. 2. The influence of too large sensitive rake angle in the oil supply hole on the performance of the diesel engine: due to the early oil supply time, the diesel engine will be difficult to start, and the combustion will be coarse, which will cause the diesel engine to produce greater noise and power decline, and the reliability of the diesel engine will be reduced due to the high working temperature of the diesel engine piston, valve, cylinder head, cylinder liner and other parts and components.

Features: Diesel engine exhaust pipe and cylinder head cover above the oil port rhythmically emit white smoke. Diesel engines are noisy to combustion.

What are the performance indicators of diesel and what is the impact on the work of diesel engines.

In order to ensure the normal and efficient operation of high-speed diesel engine, light diesel oil should have good ignition, low temperature fluidity, evaporation, chemical stability, corrosion resistance and appropriate viscosity and many other performance properties. 1) Flammability refers to the spontaneous combustion ability of diesel fuel, which is evaluated by cetane number. Diesel has a large cetane number, good ignitability, and is easy to spontaneously combust.

The national standard stipulates that the cetane number of light diesel oil is not less than evaporation, which refers to the ability of diesel fuel to evaporate and vaporize, and is expressed by the temperature range of a certain percentage of diesel distillation, that is, distillation range and flash point. For example, the distillation temperature of 50 is the temperature at which diesel distills 50, and the lower this temperature, the better the evaporation of diesel. The national standard stipulates that this temperature shall not be higher than 300, but does not specify a minimum temperature.

In order to control the evaporation of diesel fuel from being excessive, a minimum value of the flash point is specified in the standard. The flash point of diesel refers to the temperature at which the flash ignition begins to occur under certain test conditions when the mixture formed by diesel vapor and the surrounding air is close to the flame. Low flash point and good evaporation.

3) Low-temperature fluidity The low-temperature fluidity slag is evaluated by the freezing point and cold filter point of diesel. The freezing point refers to the temperature response when the diesel loses fluidity and begins to solidify, while the cold filter point refers to the maximum temperature at which the diesel cannot flow through the filter for 20ml within 1min under specific test conditions. Generally, the cold filter point of diesel fuel is 4 6 higher than its freezing point.

4) Viscosity is an index to evaluate the dilute consistency of diesel, which is related to the fluidity of diesel. The viscosity of Qingbo changes with temperature, and when the temperature increases, the viscosity decreases and the fluidity increases. Conversely, when the temperature decreases, the viscosity increases and the fluidity decreases. The three indicators specified in GB T252 2000, such as actual gum, 10% distillation residue and oxidation stability, and total insoluble matter, are the evaluation indicators of diesel stability.

The corrosion resistance of diesel fuel is evaluated by indicators such as sulfur content, mercaptan sulfur content, acidity, copper sheet corrosion and water-soluble acid or alkali. Ash, moisture and mechanical impurities in diesel fuel are indicators to evaluate the cleanliness of diesel. Automobile diesel engines should use diesel that meet national standards in all indicators.

The size of the diesel engine fuel supply advance angle is related to the combustion quality. Fuel supply advance angle chain celery refers to the time point when the fuel injection pump starts to inject fuel after the crankshaft rotates at a certain angle, which directly affects the mixing and combustion process of fuel in the cylinder. If the feed advance angle is too small, the fuel may not be fully mixed, resulting in incomplete combustion, black smoke and pollutants; If the feed advance angle is too large, the fuel may enter the cylinder prematurely, resulting in an unstable combustion process, noise and damage to the engine.

Therefore, the correct size of the feed advance angle can ensure the combustion mixing and combustion, and improve the performance and economy of the engine.

Summary. Dear We are very happy to answer your <> one-on-one

<>1. This statement is incorrect. 2. The size of the advance angle of diesel engine fuel supply has a great relationship with the combustion quality. The advance angle of fuel supply refers to the time difference between the time point when the fuel injection pump rotates at a certain angle on the crankshaft and the time when the piston reaches the top dead center.

3. This time difference will affect the timing and process of diesel combustion, and then affect the combustion quality. 4. If the advance angle of fuel supply is too small, the start time of fuel injection is too late, and the fuel does not have enough time to fully mix and evaporate, which will lead to incomplete combustion, increased emissions, and power decrease. If the feed advance angle is too large and the injection starts too early, it will cause the fuel to catch fire prematurely in the cylinder, creating excessive pressure and temperature, causing knocking and vibration, and increasing noise and emissions. 5. Therefore, in the actual work of the diesel engine, adjusting the size of the fuel supply advance angle can optimize the performance of the diesel engine and improve the combustion quality.

The size of the advance angle of diesel engine fuel supply has nothing to do with the combustion quality.

Dear We are very happy to answer your <> one-on-one

<>1. This statement is incorrect. 2. The size of the advance angle of diesel engine fuel supply has a great relationship with the combustion quality. The advance angle of fuel supply refers to the time difference between the time point when the fuel injection pump rotates at a certain angle on the crankshaft and the time when the piston reaches the top dead center.

3. This time difference will affect the timing and process of diesel combustion, and then affect the combustion quality. 4. If the advance angle of fuel supply is too small, the imitation room is too late when the fuel injection starts, and the fuel does not have enough time to fully mix and the steaming beam is large, which will lead to incomplete combustion, increased emissions, power decline and other problems; If the feed advance angle is too large and the injection starts too early, it will cause the fuel to catch fire prematurely in the cylinder, creating high pressures and temperatures in the Oak State, causing knocking and vibration, and increasing noise and emissions. 5. Therefore, in the actual work of the diesel engine, adjusting the size of the fuel supply advance angle can optimize the performance of the diesel engine and improve the combustion quality.

Hello dear. The above is a detailed answer to the questions related to the size of the diesel engine fuel supply angle and the combustion quality of the banquet bucket, I hope my can help you with the mountain mill. <>

I have helped you find the results: Hello, the size of the diesel engine fuel supply angle is related to the combustion quality. The advance angle of diesel engine fuel supply refers to the time when the fuel injection type of the fuel injection pump is ahead of the piston to reach the top dead center, which has an important impact on the combustion quality.

If the advance angle is too small, the fuel injection time will be too late, the fuel can not be fully mixed, and the combustion will be incomplete, which will produce black smoke and high temperature emissions, and will also reduce the power and fuel economy of the diesel engine; If the advance angle is too large, the fuel injection time will be too early, the fuel will not be completely burned, and black smoke and high temperature emissions will also be generated. Therefore, the size of the diesel engine fuel supply in advance needs to be reasonably adjusted according to the specific diesel engine model, working state, load and other factors to achieve the best combustion effect and economy. Hope mine is helpful to you<>