A marine crank automatic monitoring device

Abstract

The invention relates to an automatic monitoring device for a marine crank, comprising a crankshaft, an installation cover, a rotating shaft and a crank monitoring component; the rear end of the crankshaft extends to the outside of the body and a slot is provided on the end face of the rear end; the installation cover is outside the rear end of the crankshaft and is installed on the body; one end of the rotating shaft is fixedly provided with a plug that is clamped to the slot, and the other end is connected with the installation cover through a bearing; the crank monitoring assembly includes a detection board fixed on the rotating shaft, which is installed on the detection board and is located on the same circular track The top dead center receiver, the ignition starting point receiver and the fuel injection starting point receiver are installed on the inner side wall of the installation cover and are respectively two laser transmitters corresponding to the two ends of the vertical diameter of the circular track. The invention can control the igniter and the fuel injector above the two groups of alternately operating pistons at the same time, the whole device is simple in structure, does not need to perform a large amount of data calculation, has fast response speed, and has a long service life.

Description

technical field [0001] The invention belongs to the field of diesel engine crank monitoring devices, in particular to an automatic monitoring device for marine cranks. Background technique [0002] In order to detect the crank angle position of the engine, a ring gear is installed on the crankshaft, a plurality of convex parts (teeth) at equal intervals are provided on the ring gear, and a tooth missing part for determining the reference position of the crankshaft is formed at one place And make it unequal interval. When the engine is running, the convex part and the concave part are measured, and the ratio of the missing tooth part, that is, the reference position, can be recognized, and the crank angle can be detected. Fuel injection timing and ignition timing are controlled based on the measured crank angle. [0003] The fuel injection time can be obtained by detecting the fuel injection advance angle, and the ignition time can be obtained by detecting the ignition adva...

AI Technical Summary

Problems solved by technology

[0006] In this case, since the device for detecting the angular position of the crankshaft needs to be installed on the crankshaft and one side of the crankshaft, and the temperature inside the cylinder body is relatively high, the entire device is easily affected by high temperature, resulting in reduced service life and low detection accuracy. Gradually decline over time, it is very troublesome in subsequent maintenance and replacement, and the maintenance cost is very high;

[0007] In addition, during the continuous operation of the crank and crankshaft, multiple angle data will be calculated corresponding to each revolution, and the ignition and fuel injection will be controlled when the fuel injection advance angle and ignition advance angle are reached. This process requires real-time calculation of data, so it will Cause response delay, miss the best fuel injection and ignition timing

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