What does PQ mean in car safety inspection?
2 Answers
PQ in oil inspection refers to the amount of ferromagnetic particles in the oil, and the PQ value is also known as the mechanical wear index. The following is an introduction to PQ-related information: Instruments for measuring PQ value: There are specialized measuring instruments for measuring PQ value, called PQ meters, also known as ferrometers. Working principle of PQ: The working principle is that the tested oil sample is slowly and steadily transported by a double-tube infusion pump to the tray support above the magnet pole through the oil delivery pipe. The ferromagnetic wear particles in the oil are adsorbed on the center of the tray support surface under the action of a strong magnetic field. Meanwhile, the oil flowing through the strong magnetic field area is sucked back by the double-tube infusion pump along the oil return pipe, and then the inner wall of the oil delivery pipe and the center of the tray support surface are cleaned with a cleaning solution (such as tetrachloroethylene) that has strong dissolving power and good volatility.
I see you're asking about the meaning of 'PQ' in car safety inspection, which might be a misunderstanding or abbreviation confusion. In fact, car safety inspection refers to the regular check of various safety performance aspects of a vehicle to ensure driving safety. Items like brakes, lights, and suspension systems are all covered. 'PQ' sounds unfamiliar—it might be a shorthand for emission testing, as in some regions, exhaust emission tests are called 'Pollution Quality' checks, where abbreviations could get mixed up. I often advise friends to get this inspection done, like spending some time during annual checks to test braking effectiveness. If brake pad wear is detected, they can be replaced promptly to avoid accidents. By the way, modern smart safety systems like automatic emergency braking can also be evaluated during inspections to ensure proper functionality—after all, safety comes first.
