Oil level detection device for internal combustion engine

Abstract

An oil level detection device for an internal combustion engine, which comprises: a housing permitting entry therein of oil; a float provided within the housing and vertically movable with the oil entered in the housing; a switch for performing switching operation in response to the vertical movement of the float within the housing; protrusions provided, on the upper surface of the float, for preventing the float from sticking to the ceiling of the housing due to viscosity of the oil; and protrusions provided, on the bottom of the housing, for preventing the float from sticking to the bottom of the housing due to viscosity of the oil.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Certain preferred embodiments of the present invention will hereinafter be described in detail, by way of example only, with reference to the accompanying drawings, in which:

FIG. 1 is a sectional side view of an internal combustion engine employing an oil level detection device in accordance with a first embodiment of the present invention;

FIG. 2 is a plan view showing a lower crankcase of the internal combustion engine employing the oil level detection device of the present invention;

FIG. 3 is an exploded perspective view of the internal-combustion-engine oil level detection device of the present invention;

FIG. 4 is a sectional front view of the internal-combustion-engine oil level detection device of the present invention;

FIG. 5 is a plan view of the internal-combustion-engine oil level detection device of the present invention;

FIG. 6 is a bottom view of the internal-combustion-engine oil level detection device of the present invention;

FIG. 7 is a sectional view taken along line 7-7 of FIG. 6;

FIG. 8 is a sectional view taken along line 8-8 of FIG. 6;

FIG. 9 is a sectional front view of an oil level detection device for an internal combustion engine in accordance with a second embodiment of the present invention;

FIG. 10 is a sectional front view of an oil level detection device for an internal combustion engine in accordance with a third embodiment of the present invention;

FIG. 11 is a sectional front view of an oil level detection device for an internal combustion engine in accordance with a fourth embodiment of the present invention; and

FIG. 12 is a view explanatory of a fundamental construction of a conventionally-known oil level detection device for an internal combustion engine.

Claims

1. An oil level detection device for an internal combustion engine, comprising: a housing permitting entry therein of oil;a float provided within said housing and vertically movable with the oil entered in said housing;a switch for performing switching operation in response to vertical movement of said float within said housing; andprotrusions provided, on an upper surface and/or lower surface of said float or on a ceiling and/or bottom of said housing, for preventing said float from sticking to said housing due to viscosity of the oil.

2. The oil level detection device of claim 1, which further comprises a resilient member provided, on the ceiling and/or bottom of said housing or on the upper surface and/or lower surface of said float, for lessening an impact caused when said float hits said housing.

3. The oil level detection device of claim 2, wherein said protrusions are provided on said resilient member to project from the ceiling and/or bottom of said housing or from the upper surface and/or lower surface of said float.