Detection device and method of ventilation pipe of crankcase

Abstract

The invention relates to the technical field of internal combustion engines, and particularly discloses a detection device and method of a ventilation pipe of a crankcase. A detection conductor is additionally arranged on the ventilation pipe of the crankcase and is connected into a vehicle-mounted computer of a vehicle to form a detection circuit. On-off of connection between the detection conductor and a communicating wire and / or a breakover support is utilized for indicating the connecting state of the ventilation pipe of the crankcase. Under the condition of normal connection of the ventilation pipe of the crankcase, the detection circuit is an access. Under the condition that any end of the ventilation pipe of the crankcase falls off, the detection circuit is switched off, and the detection circuit can be displayed through the vehicle-mounted computer so as to remind a user in time. By means of the detection device and method, the connecting state of joints of the ventilation pipeof the crankcase can be effectively detected, the advantages of low cost and convenient implementation are achieved, and the detection device and method are suitable for the improvement of an existing ventilation pipe of a crankcase.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a crankcase ventilation pipe detection device and method. Background technique [0002] When the engine is working, some combustible mixed gas and exhaust gas will always escape into the crankcase through the piston ring, and the gasoline vapor condensed into the crankcase will make the engine oil thinner and the performance will deteriorate. The exhaust gas contains water vapor and sulfur dioxide. The water vapor condenses in the engine oil to form foam, which destroys the oil supply. This phenomenon is especially serious in winter; sulfur dioxide meets water to form sulfurous acid, and sulfurous acid meets oxygen in the air to form sulfuric acid. These acidic substances The appearance of oil not only deteriorates the oil, but also corrodes the parts. As the combustible mixture and exhaust gas escape into the crankcase, the pressure in the crankcase will inc...

AI Technical Summary

Problems solved by technology

[0008] The existing ventilation pipe is directly connected to the crankcase and the outlet pipe of the air filter, wherein the ventilation pipe and the outlet pipe of the crankcase and the air filter are mainly connected by a quick-plug joint, fixed by a hoop or assembled by an interference fit. Due to the aging of joint parts, impact by external force, etc., the joints are easy to fall off, which will cause oil vapor and gasoline vapor to directly enter the air and pollute the environment, and unfiltered air will enter the engine and cause cylinder explosion.

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