JPS5927112U - Oil level sensor for internal combustion engine - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2A is a plan view of a first cover used in the embodiment, Fig. 2B is a sectional view taken along the nb-mb line of Fig. 3A is a plan view of the signal generator used in the same embodiment, FIG. 3B is a sectional view taken along the line mb-mb of FIG. 3A, FIG. 4 is a top view of the coupler used in the same embodiment, and FIG. 5A is a plan view of the second cover used in the same example;
Figure B is a sectional view taken along the line vb-vb of Figure A, Figure 6 is a partially cutaway front view showing the oil level sensor of the embodiment shown in Figure 1 installed in an engine, Figures 7 and 6 are Figure 8 is an explanatory diagram showing a state where the oil level is above the specified value and a state where the oil level is below the specified value, respectively, and Figures 9 and 10 are circuit diagrams showing different application examples of the present invention.・

Claims (5)

[Scope of utility model registration request] (1) a pipe inserted into the crank chamber of the internal combustion engine so that its tip reaches a predetermined level of lubricating oil in the crank chamber; a vacuum chamber communicated with the crank chamber through the pipe; The pipe is provided so as to shut off the vacuum chamber from the outside, and when the level of the lubricating oil becomes lower than a predetermined level, the pipe is cut off from the lubricating oil.
and a diaphragm that displaces in response to pressure changes within the crank chamber when the lubricant oil communicates directly with the crank chamber space above the oil cylinder, and detects that the level of the lubricating oil has fallen below a predetermined level due to displacement of the diaphragm. The oil level sensor includes a magnetic field magnetic signal generation mechanism that generates an electric signal by displacement of the diaphragm, and the signal generation mechanism is coupled to a signal generator fixed to the vacuum chamber and the diaphragm. An oil level sensor for an internal combustion engine, comprising a movable element that is displaced together with the diaphragm to change the magnetic flux interlinked with the coil of the signal generator. (2) The signal generator includes a permanent magnet that generates a magnetic flux that interlinks with the coil of the generator, and the movable element is made of a magnetic material and is configured to be displaced inside the coil of the generator. An oil level machine for an internal combustion engine as set forth in claim 1 of the utility model registration provided. (3) The oil level sensor for an internal combustion engine according to claim 1, wherein the mover is made of a permanent magnet and is disposed so as to be displaced near the coil of the signal generator. (4) The vacuum chamber is provided integrally with the pipe, and a screw for attaching the pipe to the engine is carved on the outer periphery of the vacuum chamber side end of the pipe. Scope of Utility Model Registration Claim 1 The oil level sensor for an internal combustion engine according to any one of items 3 to 3. (5) The oil level according to any one of claims 1 to 4, wherein the diaphragm is covered with a cover made of a magnetic material, and the signal generator is fixed to the cover. sensor.