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List of the table of contents of this article:

• 1, How to measure engine cylinder diameter
• 2. How is the cylinder diameter of a car engine measured?
• 3, What is the measurement method of engine cylinder?
• 4
  、 What are the main engine cylinder measurements?
• 5, What kind of measuring tools are needed for the measurement of engine cylinders?
• 6, How to use the engine cylinder gauge correctly?Notes

How to measure the engine cylinder diameter

1. Use a vernier caliper to determine a general cylinder diameter data, and then use a micrometer to correct the cylinder diameter table, and put the cylinder diameter meter into the cylinder to the cylinder diameter. The line measures an accurate result, which should be measured three times, and finally the average value should be calculated.

2. Steps for engine cylinder measurement: first select the outer diameter micrometer suitable for the diameter size of the cylinder to be measured, and then rotate the differential cylinder so that the two measurement surfaces contact the end surface of the correction rod. When you hear the "click" sound, check whether there is a gap and whether the differential cylinder line is aimed at the "0" position; if there is an error , should be corrected.

3. Make the measuring rod of the measuring cylinder meter in vertical contact with the i-cylinder wall.First, slide the cylinder gauge down along the cylinder wall to read the maximum swing of the pointer to the right, which is the maximum wear of the cylinder.

4. According to the standard diameter of the cylinder, select the measuring rod of the corresponding size and put on the fixing nut. Install the connecting rod on the connecting rod seat, but it is not fixed for the time being. Adjust the measuring rod length of the cylinder gauge to the standard cylinder diameter + pre-tightening amount (big car + 2mm, small car + 1mm), and lock the fixing nut.

How is the cylinder diameter of a car engine measured?

1. Automobile engine maintenance, the assembly of the cylinder and piston depends on the cylinder diameter and the roundness of the cylinder. The detection method is to use an inner diameter micrometer to detect the specific wear size of the inner diameter and roundness of the cylinder liner. When filling in the maintenance form, the main measurement data are: the upper and lower parts of the inner diameter of the cylinder liner, and the horizontal and vertical dimensions of the cylinder liner.

2. The main introduction of automobile engine cylinder measurement: first use the inner diameter percentage meter to measure the value of the cylinder diameter, and then use the micrometer to measure the value of the cylinder diameter on the measuring rod of the percentage meter, and then read the value on the micrometer, which is the cylinder diameter; remove the cylinder head fixing screw, and pay attention to the screws should cross from the two ends to the middle. Spin pine.

3. The cylinder diameter is the diameter of the cylinder, and the stroke is the distance between the upper stop point and the lower stop point of the piston movement stroke. For example: a car engine with a cylinder diameter of 80mm, a stroke of 90mm, and a four-cylinder engine.

4. Car engines have 10 and 12 cylinders. Under the same cylinder diameter, the more cylinders, the larger the displacement and the higher the power. Under the same displacement, the more cylinders, the smaller the cylinder diameter, the higher the rotation speed, and the higher the power. How to judge how many cylinders a car has: 1.

What is the measurement method of engine cylinder?

Automotive engine cylinder measurement main_sudden introduction: first use the inner diameter percentage meter to measure the value of the cylinder diameter, then use the micrometer to measure the value of the cylinder diameter on the measuring rod of the percentage meter, and then read out the value on the micrometer is the cylinder diameter;Remove the cylinder head fixing screw, and note that the screw should be crossed and loosened from both ends to the middle.

The first method is to inject a little oil (20-30ml) into the spark plug hole and then measure the cylinder pressure. If the compression pressure of the cylinder is the same as before oil injection, it is a valve leakage; if the measured value is more than before oil injection, it means that the cylinder wall, piston, piston ring and other parts are seriously worn.

According to the standard diameter of the cylinder, select the measuring rod of the corresponding size and put on the fixing nut. Install the connecting rod on the connecting rod seat, but it is not fixed for the time being. Adjust the measuring rod length of the cylinder gauge to the standard cylinder diameter + pre-tightening amount (big car + 2mm, small car + 1mm), and lock the fixing nut.

Use a vernier caliper to determine an approximate cylinder diameter data, and then use a micrometer to correct the cylinder diameter table., put the cylinder diameter meter into the cylinder to measure the cylinder diameter to get an accurate result. Measure the upper, middle and lower three times, and finally calculate the average.

What are the main engine cylinder measurements?

Main introduction of automobile engine cylinder measurement: first use the inner diameter percentage meter to measure the value of the cylinder diameter, then use the micrometer to measure the value of the cylinder diameter on the measuring rod of the percentage meter, and then read out the value on the micrometer, which is the cylinder diameter; remove the cylinder head fixing screw, note that the screw should be rotated from both ends to the middle. Pine.

The measurement of the cylinder block generally measures whether the upper plane is overly deformed, and the measurement of the cylinder generally measures the cylindricality, roundness and wear. When measuring the upper plane of the cylinder block, it is necessary to clean up the upper plane first and prepareHorizontal ruler or straight ruler, cross-placed on the plane, and the maximum allowable deformation amount needs to be checked by checking the original car data or checking the data.

The detection method of cylinder pressure should be carried out according to the following steps. Step 1: Install the cylinder pressure gauge on the engine. Part 2: Heat the car first, let the engine run to normal temperature, and keep the temperature of the coolant between 85 and 95 degrees. Step 3: Remove all the spark plugs or fuel injectors on the car, and iron the high-voltage wire.

Measurement method and determination of numerical values. Before measuring the cylinder pressure, all spark plugs should be removed and the measuring gauge back to zero should be touched at the spark plug seat hole of the cylinder being measured (some cylinder pressure gauges are screwed on the spark plug hole). Start the engine, observe and remember the value indicated by the first beating of the needle.

What kind of measuring tools are needed for the measurement of engine cylinders?

1. Precision straight ruler and plug ruler. According to the relevant public information of the query, the cylinder block warps, the unevenness of the surface of the cylinder block or the warping of the plane on the cylinder block is measured with a precision straight ruler and plug ruler. Measuring instruments are tools for measuring and measuring, such as rulers, balances, angular measuring instruments, measuring cylinders, etc.

2. Tools used for preparation before measurement: inner diameter percentage table, outer diameter micrometer, caliper, clean cloth, etc.

3. If the cylinder diameter is not too high, it can be measured with conventional measuring tools, inner diameter gauge, internal micrometer, etc., and the measurement accuracy can be estimated to be 0.001 mm. If the requirements are high, please use a three-coordinate measuring instrument to measure. The workpiece is measured at a constant temperature, and the measurement accuracy can reach the micron level.

How to use the engine cylinder gauge correctly? Notes

Steps for using the cylinder gauge: First, put the active probe of the cylinder gauge into the cylinder at a certain angle, and then press the rod of the cylinder gauge with your hand and slowly move the rod to make it parallel to the cylinder axis. Move the cylinder meter left and right or up and down to find the position of the shortest distance, which is the minimum value of the inner diameter of the cylinder.

When measuring with a cylinder gauge, attention should be paid to keeping the measuring rod and the cylinder axis perpendicular to the accuracy of the measurement. When the pointer of the swing cylinder gauge indicates the minimum reading, it means that the measuring rod is perpendicular to the cylinder axis, and the reading can only be recorded, otherwise the measurement is inaccurate.

Move the cylinder meter left and right or up and down to find the position of the shortest distance, that is, the minimum value of the inner diameter of the cylinder.Read the minimum value indicated by the pointer. The scale of the dial of the percentimeter is 100, and the pointer rotates a grid on the disc to 0.01mm. Turn around for 1mm. The small pointer moves a grid to 1mm.

How to use the cylinder gauge? First, put the moving probe of the cylinder meter into the cylinder at a certain angle, and then press the axis of the cylinder meter by hand and slowly move the axis to make it parallel to the cylinder axis. Or move the cylinder gauge left and right up and down to find the shortest distance, which is the minimum value of the inner diameter of the cylinder.

Turn the engine warm-up and then shut down; after removing all the high-pressure lines; use the cylinder to compress the air pressure to push out the spark debris; carefully remove all the spark plugs; rotate the engine crankshaft with the throttle fully open to measure the compression pressure of all cylinders.