JPS62182414A - Lubricating device for engine - Google Patents

Abstract

PURPOSE:To make the discharge of abrasion powder and sludge performable during engine stoppage, by installing a valve, which is opened or closed with an engine oil pressure, in an oil drain passage interconnecting an oil sump part for lubricating every part of an engine and a crankcase through. CONSTITUTION:An oil sump part 2 of a cam case and a crankcase 1 are interconnected to each other through an oil drain passage 6, and in the point midway in this oil drain passage 6, there is provided with an on-off valve consisting of a valve 9, a spring 10 and a retainer 11. Lubricating oil out of a lubricating oil feed passage 7 acts on an outer end of the valve 9, and during operation, the valve 9 closes the oil drain passage 6, whereby a necessary lubricating quantity is stored in the oil sump part 2. When an engine is stopped, the valve 9 is opened, and lubricating oil inside the oil sump part 2 is discharged into the crankcase 1 together with abrasion power and sludge.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a lubricating device for an engine.

[Conventional technology]

FIG. 2 is a cross-sectional view of a main part showing an example of a lubricating device for parts such as a cam and a cover part that require lubricating oil in a conventional general engine.

In Figure 2, 1 is the crankcase, 2 is the oil sump part of the cam chamber,
3 is a camshaft, 4 is a cam bearing, 5 is a tappet, and 8 is a lubricating oil relief hole.

As shown in the figure, conventionally, the cam surface of the camshaft and the contact surface of the tappet are lubricated with lubricating oil stored in an oil reservoir in the cam chamber, but a lubricating oil relief hole is set for both when the engine is running and when it is stopped. The oil level was maintained.

[Problem that the invention seeks to solve]

(1) In the conventional method, when replacing deteriorated lubricating oil with the engine stopped, the lubricating oil remains up to the oil level set in the lubrication hole in Figure 2, and when the engine is operated again, new oil and deteriorated oil are mixed. Mixing accelerates deterioration.

(2) Since abrasion powder of the camshaft and tappet and sludge of deteriorated oil cannot be completely removed from the cam chamber, wear of the cam surface and the tappet contact surface is accelerated.

(3) For those with an inspection window for maintenance inside the cam room, lubricating oil will scatter to the outside when the window is fully opened for inspection, etc., staining the engine and engine room.

SUMMARY OF THE INVENTION An object of the present invention is to provide an Ennon lubricating device which eliminates all the drawbacks of the conventional devices, facilitates maintenance and inspection work, and improves durability.

[Failure to solve the problem]

In the engine lubrication device according to the present invention, when the engine starts and the lubricating oil supply pressure reaches a set pressure, the oil drain passage in the oil reservoir is closed, and when the engine stops and the supply pressure disappears, the oil drain passage is fully automatically closed. An oil drain passage opening/closing valve that opens to the inside of the passage is disposed within the passage.

[Effect]

While the engine is running, the required amount of lubricating oil can be stored in the oil sump, and when the engine is stopped, the lubricating oil can be drained and wear particles and sludge can be discharged.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 shows an embodiment of the present invention for a lubricating oil reservoir in a cam chamber of an engine, in which 1 is a crankcase, 2 is an oil reservoir in a cam chamber, 3 is a camshaft, 4 is a cam bearing, and 5 is a rotor. ,
), 6 is an oil drain passage, 7 is a lubricating oil supply passage, 8 is a lubricating oil relief hole at a high level position, 9 is a valve, 10 is a spring, 11
It is a retainer for the spring.

Next, the oil drain passage opening/closing valve (9, 1
0, 11) will be explained.

When the engine starts, the oil pressure in the lubricating oil supply passage 6 increases, and the oil drain passage opening/closing valve 9 moves against the force of the spring 10 due to the oil pressure, completely closing the entire oil drainage passage. In this way, while the engine is running, the oil draining from the oil drain passage 6 is stopped, and the lubricating oil supplied into the cam chamber is accumulated up to the level of the high-level lubricating oil relief hole 8. However, when the engine is stopped, there is no oil pressure, so the valve 9 of the on-off valve is opened by the pressure of the spring 10, and the lubricating oil in the cam chamber oil reservoir 9 section 2 is completely discharged to the oil tank together with worn gold powder and sludge.

In the above embodiment, a case is shown in which an oil drain passage opening/closing valve operated by the lubricating oil supply pressure of the engine itself is used, but a solenoid valve that is closed at the same time as the engine starts may be used in the oil drain passage 6. is also possible.

〔Effect of the invention〕

Since the present invention is configured as described above, the following effects can be obtained.

(1) When changing the oil, deteriorated lubricating oil can be completely replaced with new oil, so deterioration of the lubricating oil is not accelerated.

(2) Abrasion powder and sludge accumulated in the oil sump can be automatically removed from the core oil sump at the same time as oil is drained when the engine is stopped, improving the durability of the part.

(3) During maintenance and inspection, there is no leakage of lubricating oil from the relevant parts, making maintenance and inspection work easier.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a main part of a cam chamber according to an embodiment of the present invention;
FIG. 2 is a diagram corresponding to FIG. 1 of the conventional example. 2... Oil reservoir portion, 6... Oil drain passage, (9, 10, 1
1)...Open/close valve. Figure 1

Claims (1)

[Claims] In an engine equipped with a pressure-feeding lubrication system, there is an oil reservoir for lubricating various parts of the engine, an oil drain passage that communicates the oil reservoir with the crankcase, and an oil drain passage provided within the oil drain passage to lubricate each part of the engine. An engine lubricating device comprising an on-off valve that opens and closes the engine.