JPS59215910A - Suction and exhaust valves lubricating unit of engine - Google Patents

Abstract

PURPOSE:To prevent scuffing and seizure of the piston of an engine caused by shortage of lubricating oil due to draining when starting up the engine after being not operated for a long time by providing an exclusive oil feeding duct for suction and exhaust valves, independently from the pressure feeding system lubricating device, and installing a pump, which is operated only when starting up the engine, at a portion of this oil feeding duct. CONSTITUTION:Lubricating oil in a lubricating oil basin 4 is fed under pressure to respective bearing units of a crank shaft 13, tappet valve cam shaft 18, locker arm 20, etc. by a pressure feed system oil lubricating device A including a pump Po. Besides, an exclusive oil feed duct 5 for suction and exhaust valves is provided independently from a pressure feed system oil lubricating device A and its pipe end 5a is connected to the oil cleaner 30 of the lubricating oil basin, while its pipe end 5b is connected to a lubricating oil feeding port 3 respectively. The opening of this oil feeding port 3 is oriented towards a valve shaft 2 through the upper part of a head cover 21. And an auxiliary pump P installed on an oil feeding route 5 is driven when the main switch 23 is put in the glow position G and is stopped when the switch 23 is changed over to the start-up position Q.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine intake and exhaust valve lubrication system that eliminates seizure of the intake and exhaust valves due to lubrication delay during startup.

Generally, when the engine is stopped for a long time.

The lubricating oil around the valve stem ends up in the lubricating oil reservoir below, so when starting a new engine, there is a drawback that the lubricating oil may lag and seize the valve stem.1゜.

In particular, agricultural machines such as rice transplanters, hard harvesters, and other agricultural machinery that operate seasonally are stored in barns for long periods of time outside of the season. In order to take out and take out other machines while this is being stored, the agricultural machine in No. 7 may be moved several times and operated for a short period of time, and in this case.

Since there was a significant lack of lubricating oil around the valve stem, there was a high risk of seizure.

Therefore, 1 the present invention provides a basic structure of -F: 1. For example, as shown in FIG. Open the lubricant oil supply port 6 toward the engine E and supply the lubricating oil stored in the lubricating oil reservoir 4 of the engine E to the Bonopo P. The lubricating oil is supplied to the valve shaft 2 from the lubricating oil supply port 5 by pressure feeding.

However, as shown in FIG. 2, conventionally, lubricating oil is supplied by a lubricating pump P of a pressure-feeding type lubricating device. Since the amount of oil is dispersed in each lubricating part and there is a delay in reaching the valve stem, when the engine starts, the lubricant is delayed and ('r1) the intake and exhaust valves seize due to lack of precision. Additionally, during operation, there was a problem in which excessive lubrication caused oil to drip from the valve shaft holes of the intake and exhaust valves into the intake and exhaust boats.

The present invention solves the second problem by ensuring a sufficient amount of lubricating oil at the time of startup to prevent the valve stem from seizing or sticking, and also to prevent lubricating oil from flowing into the intake/exhaust boat during operation. The purpose is to eliminate it.

The present invention is intended to achieve the object -1-. The previous intake and exhaust valve lubricating device is configured as shown in FIG. 1, for example.

That is, the intake and exhaust valve exclusive oil supply passage 5 is provided in one engine E independently from the royal feed type lubrication system, and the starting end 5a of the intake and exhaust valve exclusive oil supply passage 5 is connected to the lubricating oil reservoir 4, and the terminal end 5b of -f: is provided for lubrication. In communication with the oil supply port 6, a pop P is provided in a part of -f:.

Then, the engine start preparation operation tool 6 is operated so that the pump P is driven only when the engine E start preparation operation tool 6 is operated to start the engine, and is not driven at other times. This makes it possible to control the drive in a durable manner.

Therefore, during engine starting operation, lubricating oil is supplied to the valve shaft 2 from the intake/exhaust valve dedicated oil supply path 5 by the pump P.
Further, when the engine is operating, the pump P is stopped and the supply of lubricating oil from the dedicated oil supply path 5 is cut off.

The present invention is configured and operates as described above, and when the engine is preparing to start, the lubricating oil is powerfully supplied from the dedicated oil supply path to reliably lubricate the valve shaft. Eliminates seizure and galling of the shaft.

This lubricant supply uses a dedicated lubrication pump,
In addition, since lubrication is performed intensively at one location on the valve shaft, the time required for the lubricating oil to reach the valve shaft can be shortened and lubrication can be performed quickly.

In addition, while the engine is running, the dedicated refueling route is closed.
Excessive lubrication to the valve stem can be eliminated by only supplying lubricating oil from the conventional lubrication system, which prevents lubricating oil from flowing down from the valve stem hole to the intake and exhaust boat.
Decrease in combustion efficiency and air pollution caused by lubricating oil entering the combustion chamber can be prevented.

In addition, lubricating oil can be supplied and stopped automatically to the dedicated oil supply path by turning on and off the engine start preparation operation tool, so there is no need to forget operations, and quick and accurate lubrication can be achieved without any troublesome effort. (5) -
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I can do that.

Embodiments of the F1 invention will now be described with reference to the drawings.

Figure 1 is a longitudinal sectional front view of a diesel engine,
A piston 11 is slidably inserted into the cylinder 10 of the engine E, and the crank @ 15 and the piston 11 are interlocked and connected via a connecting rod 12.

The intake/exhaust valve 1 and the auxiliary combustion chamber 15 face the combustion chamber 14 located on one side of the biston 11, and the fuel injection nozzle 16 and the glow plug 6 face the auxiliary combustion chamber 15.

Further, a valve train 17 is provided on the right side of the piston 11, and the valve train 17 is connected to a valve train camshaft 18. Butsch rod 19
．． The rocker arm 20 and the intake port 4 are composed of the valve 1.

The valve drive camshaft 18 is interlocked with the crankshaft 16.

The rotation of the camshaft 18 is transmitted to the bushing rod 19.

The intake/exhaust valve 1 can be opened and closed by a rocker arm 20 which is swingably displaced by the bushing rod 19.

First, an engine EKE feed type lubrication device A was installed.

, (6) Lubricating pump P is kept in lubricating device A with lubricating oil supply port 6 opened toward each engine element including rocker arm 20. supplies lubricating oil to each element.

That is, 1. An oil screener 30 is provided in the lubricating oil reservoir 4 below the crankcase 22, and the lubricating oil that has passed through the screener 30 is sent to the lubricating pump P. The lubricating oil is guided to the lubricating oil supply port 6 and supplied to the rocker arm 20 and the like.

Connect the glow plug 6 to the glow position G of the main switch 25, the starter motor 24 to the starting position Q, and the electrical equipment 26 such as a light to the main circuit position R, and set the switch 2'5 to each position. Activate the corresponding device by connecting. Note that the symbol S indicates the off position, and the symbol 27 indicates the battery.

On the other hand, the engine E has a pressure-feed type e oil supply path 5 dedicated to intake and exhaust.
5 Provided independently from the sliding device A, the starting end 5 of the oil supply path 5
A is connected to the oil screener 30 of the lubricating oil reservoir, and the terminal end 5b of 7 is connected to the lubricating oil supply port 6. ;f Next, the supply port 6 is opened from one side of the head cover 21 toward the valve shaft 2, and an auxiliary lubrication pump P is attached in the middle of the oil supply path.

The auxiliary lubrication pump P is connected live in parallel to the glow circuit GK to which the glow plug 6 is connected, and is driven by connecting the main switch 26 to the glow position P.

Therefore, when the main switch 26 is set to the glow position G, the glow plug 6 operates to preheat the air-fuel mixture and prepare for starting the engine.
operate at the same time, lubricating oil is quickly supplied to the exhaust valve 1, and the amount of lubricating oil on the valve shaft is ensured.

Then, when the main switch 25 is switched from the glow position G to the start position Q, the cell motor 24 rotates and the power supply to the lubricating oil pump P is cut off, so that lubricating oil is not supplied from the dedicated oil supply path to the valve shaft. Stop.

Therefore, the valve shaft 2 is only lubricated by the lubricating oil mist supplied from the pressure-feeding lubrication device A filling the head cover.

Excessive lubrication can be prevented.

The starting preparation operating tool 6 for turning on and off the pump P is not limited to the above-mentioned glow plug B.

The present invention may be applied to a pump device, and in short, any operating tool can be selected as long as it is used for turning on and off the pump and is used to prepare for starting.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and is a longitudinal sectional front view of a diesel fuel engine, and FIG. 2 is a longitudinal sectional view of part 9 of a conventional example. 1-... Intake and exhaust valve, 2... Valve stem, 6... Lubricating oil supply port. 4... Lubricating oil reservoir, 5... Oil supply path for exclusive use of intake and exhaust valves, 6
...Operation tool for starting the engine, Po/P...pump. E... Engine, A... Pressure feed type lubrication device. Patent applicant Kubota Iron Works Co., Ltd.

Claims (1)

[Claims] 1. The engine E is provided with a pressure feed type lubrication device A. Engine E
A lubricating oil supply port 6 is opened toward the valve shaft 2 of the intake/exhaust valve 1, and the lubricating oil stored in the lubricating oil reservoir 4 of the engine E is pumped through the lubricating oil supply port 5 to the valve shaft 2. In an engine intake/exhaust valve lubrication device configured to supply lubricating oil, an intake/exhaust valve exclusive oil supply path 5 is provided in the engine E independently from the pressure-feeding type lubrication device A, and a starting end 5a of the intake/exhaust valve exclusive oil supply path 5 is provided with lubricating oil. An operating tool 6 for preparing to start the engine E is configured to drive the pump P only when the terminal end 5b of the reservoir 4 is connected to the lubricating oil supply port 5, and not to drive it at other times. An engine intake/exhaust valve lubrication system 2 characterized in that the pump P is configured to be drive controllable during emergency use; The device 6 is a glow plug 3. In the intake/exhaust valve lubricating device according to claim 1, the operation device 6 for starting preparation is a decompression operation device.