JPS5919769Y2 - Rotary piston engine lubrication system - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a lubricating device for a rotary piston engine.

Metering oil, which serves as a lubricating oil for the inner circumferential surface of the rotor housing in a rotary piston engine, has conventionally been supplied into the housing from the intake port together with fuel. The amount that adheres to the surface is small, so a large amount is inevitably supplied to compensate for this.

Therefore, there are problems in that oil consumption increases and a large amount of oil is discharged into the exhaust system, degrading the function of the catalyst as an exhaust purification device installed in the exhaust system.

Therefore, in order to reduce the amount of oil supplied as much as possible, an oil supply hole was opened on the inner circumferential surface of the rotor housing, and the oil was sent directly into the housing, and the apex seal of the rotor was used to rake the oil onto the inner circumferential surface of the housing. This device has been proposed, but because the oil supply hole was opened in the center in the axial direction, the oil distribution was large in the center, and a large amount of oil was poured into the plug hole that opened in the center in the axial direction. There was a problem that it would fall and adhere to the plug, impairing ignitability and durability.

This idea was made in view of the above-mentioned conventional problems.Basically, the opening position of the oil supply hole is set axially outward from the side edge of the plug hole, and the oil distribution is adjusted axially. The purpose of the present invention is to provide a new lubricating device in which the amount of drop into the plug hole can be suppressed to a very small amount by reducing the central portion in the direction.

Hereinafter, embodiments of this invention will be described in detail with reference to the accompanying drawings.

As shown in Fig. 1, 1 is a casing of a rotary piston engine, which includes a rotor housing 2 having a trochoidal inner peripheral surface, and side housings 3, 3 (see Fig. 3) located on both sides of the rotor housing 2. It consists of

4 shows the inside of the casing 1 at its top 4a,..., 4a
Apex Seal 5. . . 5 is a polygonal rotor that performs planetary rotation movement by sliding the top portion 4a.

..., 4a partition the inside of the casing 1 into three working chambers.

The intake chamber 6 has an intake port 7 in the side housing 3 for supplying fuel, and the compression explosion chamber 8 has a plug hole 10 in the axial center of the rotor housing 2 in which a spark plug 9 is installed. , exhaust ports 12 are opened in each of the exhaust chambers 11 to exhaust combustion gas.

On the other hand, the intake side short axis 13 and the intake side long axis 1 in the intake chamber 6
4, on the inner peripheral surface of the rotor housing 6,
As shown in FIG. 2, outside the tangent line 15.
．． Oil supply holes 16 and 16 for supplying metering oil are opened near 15, respectively.

As shown in FIG. 1, the oil supply hole 16.16 is connected to a socket 19 by a metering oil pump 18 that controls the amount of oil supplied from the tank 17 according to the load.
Supply via.

Oil supply hole 16.1 with opening position set as above
When the metering oil 20 is supplied from the rotor housing 2, the oil distribution decreases in the axial center of the rotor housing 2, where the plug hole 10 is located, as shown in FIG.

Thus, the metering oil 20 supplied from the oil supply hole 16.16 is transferred to the apex seal 5.1 of the rotor 4.
... When the inner circumferential surface of the rotor housing 2 is scraped in step 5, the metering oil 20 flows into the plug hole 10 in the axially central part due to the characteristics of oil distribution, which is more concentrated on both sides away from the axially central part. It is possible to suppress the amount of depression to a very small amount.

In particular, as shown in FIG. 3, there is a shaft that returns the cooling water cooled by the radiator 21 to the radiator 21 from one side housing 3 through the rotor housing 2, the other side housing 3, and the rotor housing 2. When a flow type cooling structure is adopted, the temperature on the inlet side of the cooling water is low and the temperature on the outlet side is high, so it should be installed on the high temperature side.

In other words, the viscosity of the metering oil 20 varies depending on the temperature, and the distribution of oil is increased on the high temperature side where the viscosity is low and it is easily scraped off by the apex seal 5, and the oil is distributed on the low temperature side where the viscosity is high and it is difficult to scrape off with the apex seal 5. By reducing the distribution of oil, a uniform oil film can be ensured on the inner peripheral surface of the rotor housing 2.

As is clear from the above explanation, this invention sets the opening position of the oil supply hole at a position away from the plug hole, that is, outside the tangent line passing through both ends of the plug hole in the axial direction, and Because it is located close to the plug hole, the distribution of the supplied metering oil can be reduced at the position corresponding to the plug hole, and it can be approximately evened out in the axial direction, so that the amount of metering oil that falls into the plug hole is small. This reduces the risk of adverse effects on the ignitability and durability of the plug, and improves lubricity.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional view of the housing of a rotary piston engine, Figure 2 is a cross-sectional view of the housing showing the relationship between the plug hole and oil supply hole, and Figure 3 is a cross-sectional view of the housing that uses an axial flow type cooling structure. 4 is a cross-sectional view of the housing showing oil distribution. 1...Casing, 2...Rotor housing, 3.3...Side housing, 9...
...Spark plug, 10...Plug hole,
13...Intake side short axis, 14...Intake side long axis, 15.15...Line, 16.16...
...Oil supply hole.

Claims (1)

[Claim for Utility Model Registration] In a rotary piston engine in which a plug hole for mounting a spark plug is opened in the inner peripheral surface of the rotor housing at the center in the axial direction, the intake side short axis of the inner peripheral surface of the rotor housing and A lubricating device for a rotary piston engine, characterized in that an oil supply hole is provided between the long axis of the intake side and the oil supply hole opens outward from a tangent line passing through both ends of the plug hole in the axial direction and in the vicinity of the tangent line. .