Metal Crusher Parts,Crusher Part Shredder Hammer,Crusher Shredder Hammer,Liner Shredder Parts ZHEJIANG FULE MINING MACHINERY CO., LTD , https://www.fulemini.com
The most fundamental reason for the cold start or the jitter phenomenon of the neutral parking is that the combustion in the cylinder is not good. Burning is not good, the power provided by the car is not enough, and the car shakes.
Low ignition energy The first problem faced when the car starts cold starts is the low temperature. The temperature inside the engine is not enough, and the temperature of the fuel and the lubricating oil are not enough. Therefore, during the cold start, more fuel should be injected to meet the power requirements. The larger the spark plug gap, the smaller the ignition energy. When the fuel atomization at a low temperature is not good, the fuel needs a higher ignition energy. When the vehicle is used for a long time, the ignition gap of the spark plug is likely to become large, which causes the ignition energy to drop, thereby affecting the dynamic performance and causing the vehicle to shake. In addition, aging of the ignition coil, aging of the spark plug's high-voltage wire, or leakage can also result in a reduction in ignition energy.
Cold cars start the body shiver how the mixture ratio is not suitable for the oil and gas mixture ratio allocation is not allowed, both in open loop and closed loop control. In a closed-loop control car, the minimum operating temperature of the oxygen sensor is 370 degrees Celsius. If the car was just started, the oxygen sensor does not work because the temperature in the exhaust pipe does not reach 370 degrees Celsius. At this point, the ECU judges a mistake, and the control of the oil and gas mixture and ignition time by the actuator causes an error, thereby reducing the power output of the car and causing the phenomenon of jitter.
Valve and Inlet Carbide If there is carbon deposits in the valves and intakes in the engine, ECU determines that there is an error because carbon deposits can absorb the proper amount of fuel (as water flows through the embankment and the soil absorbs water). The actual control of the computer ejected assumptions of 100 oil and gas, but only 90 of them were actually fed into the cylinder (10 parts of carbon is absorbed). Even if the remaining 90 oils and gas mixtures are fully burned, the required power is not achieved. Sex, jitter is inevitable.
Different cylinder conditions are the same. The spark plug of a multi-cylinder engine also has the above problems. After a long period of use, the spark plug's ignition gap and time control will be different, but the ECU cannot diagnose this deviation and still treat them “equallyâ€. This causes actual and theoretical errors. As a result, some cylinders are produced. The power is too small and can cause jitter. After the engine is used for a long time, the gap between each cylinder sleeve and the piston may also be different, either large or small, that is, some gaps are large and some gaps are small. In the cold start, there is no good oil lubrication, large gap cylinders easily leak a certain amount of high temperature gas from the gap, thereby reducing the power output.
Water Temperature Sensor Failure If you have a fever, but the thermometer reading is normal, what will happen? The water temperature sensor is one of the important basis for the computer to determine the engine operating conditions at that time. If the engine cold start temperature is minus 10 degrees Celsius, but the sensor "tells" the computer "the current temperature is 20 degrees Celsius", then the computer will be injected at 20 degrees Celsius operating conditions, of course, the amount of oil is small, there is of course natural dither .
The other factors are that the air flow meter is dirty, which causes the intake air volume to decrease; the EGR (exhaust gas recirculation) valve is in poor working condition and introduces the exhaust gas at idle speed; the idle speed motor controls the bypass intake port to adjust the intake air volume. If the voltage is low, it may not be in place; if the oil is too bad, the corresponding heating value cannot be achieved, resulting in a small power output of the combustion. The above four factors can all lead to poor combustion of a certain cylinder during a cold start or when it is waiting in the neutral position, thereby causing engine shake.