The modern the Ruifeng machine oil lamps abnormal alarm

A modern Refine MPV, traveling 3000 kilometers, the sudden appearance of the oil warning light shiny phenomenon idle.

Troubleshooting: Check obd2 scan tool the dipstick, oil within the calibration range. Start the engine test, a long time not seen the machine oil lamps lit, try adding kicks oil, machine oil lamp in the idle case just flash a few, high-speed operation everything is normal. Loading measuring oil pressure gauge, oil pressure in the engine at first start after 130 kPa, belongs to the range of normal pressure until the operation after a while to see the oil pressure slowly drops to 80 kPa, throttle engine speed of 3000 rpm / minute, the oil pressure gauge indicates 420 kPa. From the test situation normal, fine expect to feel a certain attraction demolition oil pressure sensor, and the howling of the intake, feel the engine body of missing air cover, so add oil open again observed, the oil pressure gauge what l play a normal, it seems that the fault reason on this. So obd2 code reader the check valve chamber cover the drain hose connecting the intake manifold (located after the throttle valve), wherein the check valve and the pipes are normal, when the intake hose leading to the engine body in the check the crankcase ventilation system (located throttle before) discovered when the hose in the engine intake manifold at the connection has been blocked by the excess of the rubber, the through hole is very small.

Troubleshooting: clear the obd2 scanner crankcase ventilation system intake hose leading to the engine block, the engine oil pressure is normal, commissioning and troubleshooting.

Fault analysis: poor intake due to the engine crankcase ventilation system, the engine idle speed when a higher degree of vacuum in intake manifold suction, the air is sucked out of the machine body of the engine, while the access to the machine body of the engine air intake less cause the engine the body negative pressure, oil pump, pump oil resistance is increased, so that the oil pressure is reduced. When the high-speed operation of the engine, since the throttle valve is opened, the degree of vacuum within the intake manifold becomes small, the suction decreases, the pressure did not affect on the body of the engine machine, so the high engine speed detected when auto diagnosis the lubricating oil pressure in the normal range.