This article mainly introduces how to adjust the Deutz engine 1013 series unit pump
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The method to adjust the fuel supply timing is as follows: Open the inspection window on the side of the fuel injection pump and find the tappet corresponding to the plunger to be adjusted; loosen the timing screw lock nut on the tappet; if the timing is delayed, You should unscrew the timing screw a little, lock it with a lock nut and try again; if the timing is advanced, screw in the timing screw a little, lock it with a lock nut and try again (this situation is rare); after each adjustment , carefully turn the cam slowly to raise the plunger to its highest point. Then, use a screwdriver to pry up the tail of the plunger, and use a thickness gauge (feeler gauge) to measure the gap between the tail of the plunger and the head of the timing screw. This gap must not be less than 0.4mm to prevent the plunger from hitting the oil delivery valve seat and damaging the two sets of coupling parts. If the timing requirements can be met only if the gap is less than 0.4mm, a new plunger assembly must be replaced. Maintenance of oil supply advancer
Just like the ignition advance of a gasoline engine, a diesel engine also starts injecting fuel before the piston reaches the top dead center of the compression stroke, which is called the injection advance angle. Only with the injection advance can the fuel atomization and maximum combustion efficiency be ensured. Get motivated. The crankshaft angle from the start of fuel injection to the compression top dead center of the fuel injection pump is called the fuel supply advance angle. There is a scribed line and indicator piece on the advance housing at the front end of the fuel injection pump to indicate the fuel supply advance angle.
Common faults of the advancer are oil seal leakage and driven plate wear. The parts in the advancer work in oil, and the oil dampens the vibration of the flying iron. The lack of oil will affect the working performance of the advancer; the curve shape wear of the driven plate will also change the working performance of the advancer. Therefore, when the diesel engine lacks power at high speed, becomes thicker in smoke, or overheats, you should check the characteristics of the advancer.
The working characteristics of the advancer need to be checked on the fuel injection pump test bench. For the advance device used in the non-supercharged CA6110 engine, when the speed is lower than
500r·min-1, the advance angle is 0°; when the speed is 1500r·min-1, the advance angle is 6.5°. For the advance device for supercharged engines, when the speed is lower than 500r·min-1, the advance angle is 0°; when the speed is 1300r·min-1, the advance angle is 5°. The advance angle changes linearly with the rotational speed, that is, it changes in direct proportion to the rotational speed. If the characteristic curve measured in the test deviates from the above requirements, it should be inspected and repaired. The working characteristics of the advancer have changed, indicating that the surface in contact between the driven plate and the flying iron roller has been worn. It can be removed and its curved surface shape can be repaired with a whetstone to restore it to its original shape. Then put a gasket with a thickness equivalent to the total amount of wear and grinding under the driven plate spring seat to keep the position of the curved surface unchanged. The repaired advancer should be installed and retried until the working characteristics meet the requirements. For an oil leaking advancer, the fault can usually be eliminated by simply replacing the oil seal. Adjustment of injection timing of unit pump The fuel supply of the single pump is the same as the fuel supply of the discrete pump. The injection timing has a great influence on the working process of the diesel engine. The adjustment of the injection timing of the unit pump is also the adjustment of the fuel supply advance angle of the fuel injection pump. If the fuel supply advance angle is too large, the air temperature in the cylinder will be lower, the mixture formation conditions when the fuel is injected will be poor, and the ignition delay period will be longer. If the fuel supply advance angle is too small, the combustion of the combustible mixture in the cylinder will be delayed, the maximum burst pressure and temperature will decrease, and even the combustion will be incomplete, which will reduce the power of the diesel engine. Decrease, diesel engine overheating, black smoke from the exhaust, reduced fuel economy and other faults. Therefore, the adjustment of the oil supply timing of the single pump is also very important. Different from the discrete pump, the unit pump is not equipped with a fuel supply timing advancer. Instead, it is adjusted directly on the unit pump by changing the distance between the fuel injection pump plunger and the fuel injection pump tappet. Adjust the thickness of the gasket Z. is Ts, the thicker the adjustment gasket is, the larger the oil supply advance angle is; the smaller the thickness of the adjustment gasket is, the smaller the oil supply advance angle is. It is necessary to adjust the appropriate adjustment gasket thickness Ts so that the fuel supply advance angle of the fuel injection pump is just suitable for the needs of the diesel engine.
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1. Calculation of adjusting the Z thickness of the gasket
2. Adjust the gasket thickness calculation formula (1)
Ts=(L-Vh)-(Lo+A/100) In the formula: L-The height from the installation plane of the fuel injection pump in the cylinder to the surface of the fuel injection pump tappet. The standard hole on the standard cylinder is Le=150mm. After replacing the cylinder, the height from the mounting plane in the cylinder to the tappet changes to L=Le+X+Y, where X+Y is the changed height difference. Vh - the pre-stroke of the fuel injection pump plunger rising from the bottom dead center to the moment when the fuel pumping starts. The Vh value can be found in the data table of the diesel engine model. For example, when the injection advance angle of the BF6M1013EC engine is 9°, the pre-stroke Vh value is 5.50mm.
L0 - the standard length from the installation plane of the single pump in the cylinder pump (when oil is about to be supplied) to the tappet surface of the single pump, L0 = 143mm.
A/100 - The difference between the standard length L0 of the single pump and the actual length. The A value has been measured and marked on the pump body when the single pump leaves the factory. When the cylinder and single pump are replaced, the calculated
theoretical value can be rounded to the applicable adjustment gasket thickness value. For example, the calculated value Ts is 1.665mm, and the rounded gasket thickness Ss value is 1.7mm.
Calculation for replacing only the fuel injection pump Z Adjust gasket thickness calculation formula (2)
Ts =Ek-(L0+A/100) where: The EK value can be found in the data table of the diesel engine model. The EP value is marked on the nameplate of the diesel engine. From the Ep value, the EK value can be found, and the Ts value can be calculated.
Adjustment of oil supply volume of single pump
The oil supply volume of the single pump is guaranteed by the original position of the oil supply rack and the stroke of the rack. After the injection timing of each fuel injection pump is adjusted, it is very important to ensure the position of the oil supply rack.
As shown in the BF6M1013EC diesel engine oil supply rack adjustment diagram.
Among them: the X value is the parameter value when the oil supply rack is in the parking position, X=0.3~1.3mm, the Stop oil.
The Y value is the maximum stroke parameter value of the fuel supply rack, Y=16.8~17.1mm. The rack stroke reaches this value to ensure the maximum fuel supply of the fuel injection pump. If the Y value is small, it will affect the fuel supply of the fuel injection pump. Oil, even when the throttle is fully opened, the maximum power cannot be exerted. Adjustment of the 1013 series single pump of Yitz engine
The method to adjust the fuel supply timing is as follows: Open the inspection window on the side of the fuel injection pump and find the tappet corresponding to the plunger to be adjusted; loosen the timing screw lock nut on the tappet; if the timing is delayed, You should unscrew the timing screw a little, lock it with a lock nut and try again; if the timing is advanced, screw in the timing screw a little, lock it with a lock nut and try again (this situation is rare); after each adjustment , carefully turn the cam slowly to raise the plunger to its highest point. Then, use a screwdriver to pry up the tail of the plunger, and use a thickness gauge (feeler gauge) to measure the gap between the tail of the plunger and the head of the timing screw. This gap must not be less than 0.4mm to prevent the plunger from hitting the oil delivery valve seat and damaging the two sets of coupling parts. If the timing requirements can be met only if the gap is less than 0.4mm, a new plunger assembly must be replaced. Maintenance of oil supply advancer
Just like the ignition advance of a gasoline engine, a diesel engine also starts injecting fuel before the piston reaches the top dead center of the compression stroke, which is called the injection advance angle. Only with the injection advance can the fuel atomization and maximum combustion efficiency be ensured. Get motivated. The crankshaft angle from the start of fuel injection to the compression top dead center of the fuel injection pump is called the fuel supply advance angle. There is a scribed line and indicator piece on the advance housing at the front end of the fuel injection pump to indicate the fuel supply advance angle.
Common faults of the advancer are oil seal leakage and driven plate wear. The parts in the advancer work in oil, and the oil dampens the vibration of the flying iron. The lack of oil will affect the working performance of the advancer; the curve shape wear of the driven plate will also change the working performance of the advancer. Therefore, when the diesel engine lacks power at high speed, becomes thicker in smoke, or overheats, you should check the characteristics of the advancer.
The working characteristics of the advancer need to be checked on the fuel injection pump test bench. For the advance device used in the non-supercharged CA6110 engine, when the speed is lower than
500r·min-1, the advance angle is 0°; when the speed is 1500r·min-1, the advance angle is 6.5°. For the advance device for supercharged
engines, when the speed is lower than 500r·min-1, the advance angle is 0°; when the speed is 1300r·min-1, the advance angle is 5°. The advance angle changes linearly with the rotational speed, that is, it changes in direct proportion to the rotational speed. If thecharacteristic curve measured in the test deviates from the above requirements, it should be inspected and repaired.
The working characteristics of the advancer have changed, indicating that the surface in contact between the driven plate and the flying iron roller has been worn. It can be removed and its curved surface shape can be repaired with a whetstone to restore it to its original shape. Then put a gasket with a thickness equivalent to the total amount of wear and grinding under the driven plate spring seat to keep the position of the curved surface unchanged. The repaired advancer should be installed and retried until the working characteristics meet the requirements. For an oil leaking advancer, the fault can usually be eliminated by simply replacing the oil seal.
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Adjustment of injection timing of unit pump
Adjustment of injection timing of unit pump The fuel supply of the single pump is the same as the fuel supply of the discrete pump. The injection timing has a great influence on the working process of the diesel engine. The adjustment of the injection timing of the unit pump is also the adjustment of the fuel supply advance angle of the fuel injection pump. If the fuel supply advance angle is too large, the air temperature in the cylinder will be lower, the mixture formation conditions when the fuel is injected will be poor, and the ignition delay period will be longer. If the fuel supply advance angle is too small, the combustion of the combustible mixture in the cylinder will be delayed, the maximum burst pressure and temperature will decrease, and even the combustion will be incomplete, which will reduce the power of the diesel engine. Decrease, diesel engine
overheating, black smoke from the exhaust, reduced fuel economy and other faults. Therefore, the adjustment of the oil supply timing of the single pump is also very important. Different from the discrete pump, the unit pump is not equipped with a fuel supply timing advancer. Instead, it is adjusted directly on the unit pump by changing the distance between the fuel injection pump plunger and the fuel injection pump tappet. Adjust the thickness of the gasket Z. is Ts, the thicker the adjustment gasket is, the larger the oil supply advance angle is; the smaller the thickness of the adjustment gasket is, the smaller the oil supply advance angle is. It is necessary to adjust the appropriate adjustment gasket thickness Ts so that the fuel supply advance angle of the fuel injection pump is just suitable for the needs of the diesel engine.
1. Calculation of adjusting the Z thickness of the gasket 2. Adjust the gasket thickness calculation formula (1) Ts=(L-Vh)-(Lo+A/100) In the formula: L-The height from the installation plane of the fuel injection pump in the cylinder to the surface of the fuel injection pump tappet. The standard hole on the standard cylinder is Le=150mm. After replacing the cylinder, the height from the mounting plane in the cylinder to the tappet changes to L=Le+X+Y, where X+Y is the changed height difference. Vh - the pre-stroke of the fuel injection pump plunger rising from the bottom dead center to the moment when the fuel pumping starts. The Vh value can be found in the data table of the diesel engine model. For example, when the injection advance angle of the BF6M1013EC engine is 9°, the pre-stroke Vh value is 5.50mm.
stroke Vh value is 5.50mm. L0 - the standard length from the installation plane of the single pump in the cylinder pump (when oil is about to be supplied) to the tappet surface of the single pump, L0 = 143mm.
A/100 - The difference between the standard length L0 of the single pump and the actual length. The A value has been measured and marked on the pump body when the single pump leaves the factory. When the cylinder and single pump are replaced, the calculated theoretical value can be rounded to the applicable adjustment gasket thickness value. For example, the calculated value Ts is 1.665mm, and the rounded gasket thickness Ss value is 1.7mm.
Calculation for replacing only the fuel injection pump Z Adjust gasket thickness calculation formula (2)
Ts =Ek-(L0+A/100) where: The EK value can be found in the data table of the diesel engine model. The EP value is marked on the nameplate of the diesel engine. From the Ep value, the EK value can be found, and the Ts value can be calculated.
Adjustment of oil supply volume of single pump The oil supply volume of the single pump is guaranteed by the original position of the oil supply rack and the stroke of the rack. After the injection timing of each fuel injection pump is adjusted, it is very important to ensure the position of the oil supply rack.
As shown in the BF6M1013EC diesel engine oil supply rack adjustment diagram.
Among them: the X value is the parameter value when the oil supply rack is in the parking position, X=0.3~1.3mm, the Stop oil.
The Y value is the maximum stroke parameter value of the fuel supply rack, Y=16.8~17.1mm. The rack stroke reaches this value to ensure the maximum fuel supply of the fuel injection pump. If the Y value is small, it will affect the fuel supply of the fuel injection pump. Oil, even when the throttle is fully opened, the maximum power cannot be exerted.
