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2025-08-20
Core components and functions of urea post-treatment
Function: Store urea solution for vehicles (usually 32.5% urea aqueous solution) and provide reaction materials for SCR systems.
2025-08-20
Natural gas safety protection accessories
Function: As an automatic protection device, when the gas pressure is insufficient or exceeds the requirements, or when abnormal situations such as hose detachment occur, the self closing valve will automatically cut off the gas supply, prevent gas leakage, and ensure gas safety.
2025-08-20
Working principle of oil pump
Positive displacement oil pump: relying on working components (such as plungers and gears) to perform reciprocating or rotary motion in the pump cylinder, alternately increasing and decreasing the working volume, to achieve liquid suction and discharge. For example, a plunger pump completes the process of oil suction and pressure by the reciprocating motion of the plunger inside the plunger sleeve.
Common faults and solutions of urea post-treatment accessories
Insufficient urea injection
Reason: clogged filter element, urea pump malfunction, nozzle wear or pipeline leakage.
Solution: Replace the filter element, inspect the urea pump or nozzle, and check the sealing of the pipeline.
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2025/08
Classification and working principle of voltage regulators
Application: Oxygen, nitrogen, hydrogen, natural gas, etc.
Characteristics: High sealing requirements are required to prevent gas leakage (such as the use of grease in oxygen regulators).
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2025/08
Working principle of throttle valve
The throttle valve is located between the air filter and the intake manifold, and controls the air flow into the cylinder by changing its opening. When the driver steps on the accelerator pedal, the throttle opening increases, the intake volume increases, and the engine speed increases; Otherwise, reduce the rotational speed.
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2025/08
The structure is simple and the cost is low, but it cannot implement complex control strategies such as traction control and cruise control.
26
2025/08
Working principle of transmitter
Sensor sensing: detecting changes in physical quantities through sensitive components such as strain gauges, thermocouples, piezoelectric crystals, etc.
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2025/08
Significantly reduce NOx emissions in exhaust, helping vehicles meet strict emission standards such as National VI and Euro VI.
26
2025/08
When starting a car, the clutch gradually engages to eliminate the speed difference between the engine and the stationary transmission system, avoiding engine stalling or sudden forward acceleration of the vehicle. For example, when the driver releases the clutch pedal, the friction plate gradually comes into contact with the flywheel, and power is smoothly transmitted from zero to the driving wheels.
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2025/08