Internal combustion engine with detector mounted in engine unit for vehicle use

Abstract

The invention reliably protects a detector from bounced water or pebble while a vehicle is traveling without increasing the number of parts.A vehicular internal combustion engine E has a compressor 7 mounted on a lower block 2 and an oil pan 3 via a bracket 20 for an auxiliary engine, and a crank angle sensor 40 which is mounted on a mounting seat formed on an external wall of an engine block Eb and exposed outside. The mounting seat is provided at the position covered by the bracket 20 interposed between the lower block 2 and the compressor 7 on the lower block 2 to constitute a lower area of the engine block Eb. The crank angle sensor 40 is covered by the bracket 20 between the lower block 2 and the bracket 20 on the back side of the bracket 20, and the compressor 7 is disposed on the face side of the bracket 20.

Description

technical field [0001] The present invention relates to an internal combustion engine for a vehicle with an auxiliary machine mounted on an engine block via a bracket and a detector mounted on a mounting portion on the outer wall of the engine block, and specifically relates to a detector installation structure. Background technique [0002] As a mounting structure of a detector of an internal combustion engine mounted on a vehicle, for example, a mounting structure of a crank angle sensor of an engine disclosed in Patent Document 1 is known. In this engine, the sensor main body of the crank angle sensor as a detector is composed of the crankshaft, the central axis of the water pump integrally provided on the side of the cylinder block, and the central axis of the alternator mounted on the side of the cylinder block through a bracket. Near the center of the enclosed area, it is mounted on the side wall of the cylinder block. In this way, since the sensor main body is flexib...

AI Technical Summary

Problems solved by technology

[0004] However, the crank angle sensor is arranged around the crankshaft, and most of them are arranged in the lower area of ​​the cylinder block. sensor, or a small bouncing stone will hit the crank angle sensor

Regarding this point, in said prior art, although the sensor main body mounted on the cylinder block is surrounded by the water pump and the alternator, since the alternator located below the water pump is mounted on the cylinder block through the bracket, since the bracket The gap between the cylinder block and the alternator becomes larger correspondingly, so water and small stones on the road are easy to enter through the gap, causing water to splash on the sensor body or being hit by small stones, sometimes causing the sensor body to injured

[0005] In addition, since the cylinder block vibrates due to the vibration of the internal combustion engine, the crank angle sensor mounted on the cylinder block also vibrates, and the durability of the crank angle sensor is reduced. In the detector, detection errors sometimes occur

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