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日期:2023-11-13   来源:
What is the difference between engine preheating and fully automatic heating?
Answer: The prerequisite for engine preheating is that when the coolant temperature is less than 10 ℃, the preheating plug will be automatically heated according to the QOS control board. When the key switch is on, the heating period is 20 seconds, and the heating display light illuminates for 8 seconds. After the heating is completed, when the key switch is in START, the car engine will continue to heat for 30 seconds.
The prerequisite for fully automatic heating is: when the gear oil temperature is less than 0 ℃, the car engine is started, and the hydraulic oil temperature sensor sends an electronic signal to the MC. The MC drives the EC motor to run at the overall target speed ratio of 1250rpm, with a running time of about 15 minutes or when the gear oil temperature rises to 2 ℃, the fully automatic heating is eliminated.
2. What are the effects of turbocharging and intercoolers?
Answer: The important role of turbocharging is to increase the power of diesel engines without changing the exhaust volume, improve the actual ignition effect, increase mechanical energy, reduce fuel consumption rate, improve the actual mixing effect, provide air to fuel ratio, reduce the emission of harmful substances, improve the low-speed characteristics, and achieve the characteristic of high torque for automotive engines in low-speed gears.
The function of an intercooler is because the turbocharged intake air will increase the ambient temperature after compression, and the friction between the gas and the intake pipe wall during the circulation process will further increase the temperature, endangering the inflation efficiency. The intercooler is like a heat pipe radiator, which disperses the gas heat into the air according to it. Rapid cooling can also increase the relative density of the gas inlet, further improving the effective power of the engine.
3. How does the tension of the track type change in various working conditions?
Answer: On a flat and solid ground, the track type should be adjusted slightly tighter; On uneven roads with many stones, the track type should be adjusted slightly loosely; On soft ground, the track type should be adjusted slightly loosely.
4. How to explain the smoke emission from the muffler during acceleration, deceleration, or load changes of the equipment?
Answer: Because lifting the intercooler elongates the safety channel at the air inlet and increases the frictional resistance at the air inlet. When the equipment undergoes acceleration, deceleration, or load changes, the automobile engine speed control motor adjusts the supply of gasoline and diesel, thereby damaging the original air fuel ratio, resulting in a sudden smoke emission. This is a normal situation.
5. Some common problems in preventing equipment from overturning?
Answer: It is strictly prohibited to fully extend and quickly rotate the bucket handle when the shovel is full; Avoid equipment depression during soft foundation treatment work; Prevent equipment from being lifted or moved; Prevent equipment from overturning when climbing slopes; Prevent overturning when turning uphill; Prevent overturning when carrying on a scooter.