Pneumatic control low-engine-oil protection device of diesel engine

Abstract

The utility model relates to the technical field of engines, in particular to a pneumatic control low-engine-oil protection device of a diesel engine, which comprises an engine body, a pilot control valve and an air supply component, the pilot control valve is arranged above the engine body, and an engine oil control valve is arranged on one side of the pilot control valve. An air door shutoff cylinder is arranged on one side of the engine oil control valve, a throttling valve is arranged on one side of the pilot control valve, an air supply assembly is arranged on one side of the throttling valve, a first air inlet and a second air inlet are formed in the upper portion of the pilot control valve, an air outlet is formed in the bottom of the pilot control valve, and a third air inlet is formed in one side of the pilot control valve. The pilot control valve and the engine oil control valve have the same internal structure; the pilot control valve and the engine oil control valve are used for switching the air channels, when the engine oil pressure of the engine is low, air in the air door shutoff cylinder is discharged, the air door shutoff cylinder closes the air inlet channel, the engine stops rotating and flames, and the engine is prevented from being damaged or even fired.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine, especially relates to a diesel engine pneumatic control low oil protection device. BACKGROUND

[0002] The diesel engine is the engine that releases energy by burning diesel, and can produce greater torque under the same displacement, and is suitable for occasions that need greater traction, such as heavy trucks, engineering machinery, etc., the energy density of diesel is high, and the thermal efficiency of the diesel engine is higher, so the fuel consumption rate is low, and the fuel economy of the diesel engine is about 30% higher than that of the gasoline engine.

[0003] The working cycle of the diesel engine includes four strokes of intake, compression, work and exhaust, each of which drives the crankshaft to rotate by a certain angle, and the four strokes make the power shaft rotate twice, in the running process of the engine, the crankshaft and the piston are in rotating or sliding motion with other parts, so machine oil needs to be added for lubrication to reduce friction.

[0004] For some old models of vehicles, the engine does not have a low oil pressure protection function, and the driver needs to check the oil level regularly and add oil after the oil is consumed, if the driver forgets to check the oil level, the friction between the parts of the vehicle will increase when the oil pressure is too low, which not only causes the engine to overheat, but also may cause the engine to be damaged, even cause serious consequences such as fire and casualties. INVENTION CONTENTS

[0005] In order to overcome the problem that most old engines do not have a low oil pressure protection function.

[0006] The technical scheme of the utility model is: a diesel engine pneumatic control low oil protection device, comprising an engine body, a pilot control valve and a gas supply assembly, a pilot control valve for controlling airflow is arranged above the engine body, an oil control valve for controlling airflow is arranged on one side of the pilot control valve, a damper closing cylinder for controlling the intake of the engine body is arranged on one side of the oil control valve, a throttle valve for controlling airflow is arranged on one side of the pilot control valve, a gas supply assembly for providing gas is arranged on one side of the throttle valve, a first air inlet and a second air inlet are arranged above the pilot control valve, an air outlet is arranged at the bottom of the pilot control valve, a third air inlet is arranged on one side of the pilot control valve, and the internal structures of the pilot control valve and the oil control valve are the same.

[0007] As a preferred, a sealing slider is arranged on the inner side of the pilot control valve, the sealing slider is in sliding sealing connection with the pilot control valve, connecting rods are arranged on both sides of the sealing slider, push plates are arranged at both ends of the connecting rods, a first spring is arranged on the outer side of the push plate on one side, and the sealing slider only blocks the first air inlet or the second air inlet after moving to the limit stroke.

[0008] As preferred, the air supply assembly comprises a start button and an air tank, the start button is arranged on one side of the throttle valve, the air tank is arranged on one side of the start button, the start button is arranged in the cab, and the air tank can be arranged in the cab or the engine compartment according to actual conditions.

[0009] As preferred, the air door closing cylinder is internally provided with a first channel, the air door closing cylinder is provided with an air vent at the top, the first blocking block is arranged in the air door closing cylinder in a sliding sealing mode, the second spring is arranged at the bottom of the first blocking block, the air inlet of the engine body is provided with an air inlet, and the air inlet is connected and communicated with the first channel.

[0010] As preferred, the start button is internally provided with a second channel, the second blocking block is arranged in the start button in a sliding sealing mode, the third spring is arranged at the bottom of the second blocking block, the air vent is arranged in the second blocking block, and the pressing rod is arranged above the second blocking block.

[0011] As preferred, the first air inlet of the pilot control valve is connected and communicated with the throttle valve, the second air inlet of the pilot control valve is connected and communicated with the air tank, the third air inlet of the pilot control valve is connected and communicated with the throttle valve, and the air outlet of the pilot control valve is connected and communicated with the first air inlet of the oil control valve.

[0012] As preferred, the second air inlet of the oil control valve is connected and communicated with the air tank, the air outlet of the oil control valve is connected and communicated with the air vent, and the oil pressure test port is arranged on one side of the engine body and connected and communicated with the third air inlet of the oil control valve.

[0013] The beneficial effects of the utility model are as follows:

[0014] By setting the pilot control valve and the oil control valve to switch the air passage, when the engine oil pressure is low, the gas in the air door closing cylinder is discharged, the air door closing cylinder closes the air inlet channel to make the engine stop and extinguish, the engine is prevented from being damaged or even catching fire, the device structure is simple, the accessories are common, the device is easy to install on the old engine, and the device economically and effectively makes up for the shortage of the old engine. DRAWINGS

[0015] Figure 1 The utility model discloses a three-dimensional structure schematic view of the utility model is shown.

[0016] Figure 2 The utility model discloses a three-dimensional structure schematic view of the pilot control valve of the utility model is shown.

[0017] Figure 3 The utility model discloses a three-dimensional structure schematic view of the start button of the utility model is shown.

[0018] Figure 4 The utility model discloses a three-dimensional structure schematic view of the air door closing cylinder of the utility model is shown

[0019] Figure 5 The air passage flat body structure of the utility model is shown.

[0020] Mark explanation: 1, engine body; 2, pilot control valve; 3, oil control valve; 4, shutter closing cylinder; 5, throttle valve; 6, start button; 7, gas storage tank; 101, valve port; 102, oil pressure test port; 201, first air inlet; 202, second air inlet; 203, third air inlet; 204, air outlet; 205, sealing slider; 206, push plate; 207, first spring; 208, connecting rod; 401, first channel; 402, air vent; 403, first blocking block; 404, second spring; 601, second channel; 602, second blocking block; 603, air hole; 604, pressing rod; 605, third spring. DETAILED DESCRIPTION

[0021] The utility model is further explained below in combination with the drawings and examples.

[0022] Please refer to Figures 1-5 The utility model provides a kind of example: a diesel engine gas control low oil protection device, including engine body 1, pilot control valve 2 and gas supply assembly, the top of engine body 1 is provided with the pilot control valve 2 of control airflow, the side of pilot control valve 2 is provided with the oil control valve 3 for controlling airflow, the side of oil control valve 3 is provided with the shutter closing cylinder 4 for controlling the air inlet of engine body 1, the side of pilot control valve 2 is provided with the throttle valve 5 for controlling airflow, the side of throttle valve 5 is provided with the gas supply assembly for providing gas, the top of pilot control valve 2 is provided with first air inlet 201 and second air inlet 202, the bottom of pilot control valve 2 is provided with air outlet 204, the side of pilot control valve 2 is provided with third air inlet 203, the internal structure of pilot control valve 2 and oil control valve 3 is same;By being provided with high pressure gas by gas supply assembly, and using pilot control valve 2 and oil control valve 3 to switch air passage, when vehicle starts, using air pressure to open shutter closing cylinder 4 air inlet passage, so that oil control valve 3 can normally air inlet, when engine oil pressure is low, oil control valve 3 internal passage changes, and gas in shutter closing cylinder 4 is discharged, so that shutter closing cylinder 4 closes air inlet passage, at this time, engine body 1 cannot air inlet and thus stall and extinguish, prevent engine from being damaged even fire due to lack of oil lubrication.

[0023] Please refer to Figures 1-2In the embodiment, the inner side of the pilot control valve 2 is provided with a sealing slider 205 which is in sliding sealing connection with the pilot control valve 2, the two sides of the sealing slider 205 are provided with connecting rods 208, the two ends of the connecting rods 208 are provided with push plates 206, the outer side of the push plate 206 on one side is provided with a first spring 207, and the sealing slider 205 only blocks the first air inlet 201 or the second air inlet 202 after moving to the limit stroke, the air supply assembly comprises a starting button 6 and a gas tank 7, one side of the throttle valve 5 is provided with the starting button 6, one side of the starting button 6 is provided with the gas tank 7, the starting button 6 is located in the cab, and the position of the gas tank 7 can be placed in the cab or the engine compartment according to the actual situation, the first air inlet 201 of the pilot control valve 2 is connected and communicated with the throttle valve 5, the second air inlet 202 of the pilot control valve 2 is connected and communicated with the gas tank 7, the third air inlet 203 of the pilot control valve 2 is connected and communicated with the throttle valve 5, the air outlet 204 of the pilot control valve 2 is connected and communicated with the first air inlet 201 of the oil control valve 3, the second air inlet 202 of the oil control valve 3 is connected and communicated with the gas tank 7, the air outlet 204 of the oil control valve 3 is connected and communicated with the air vent 402, one side of the engine body 1 is provided with an oil pressure test port 102, the oil pressure test port 102 is connected and communicated with the third air inlet 203 of the oil control valve 3; after the starting button 6 is opened, the gas in the gas tank 7 enters the third air inlet 203 of the pilot control valve 2 to push the sealing slider 205 to move and compress the first spring 207, the second air inlet 202 and the air outlet 204 are leaked, so that the gas can enter the oil control valve 3 from the first air inlet 201 of the oil control valve 3.

[0024] Please refer to Figure 3 In the embodiment, the inner side of the starting button 6 is provided with a second channel 601, the inner side of the starting button 6 is provided with a second blocking block 602 which is in sliding sealing connection, the bottom of the second blocking block 602 is provided with a third spring 605, the inner side of the second blocking block 602 is provided with a vent hole 603, and the upper side of the second blocking block 602 is provided with a pressing rod 604; after the pressing rod 604 is pressed, the vent hole 603 is communicated with the second channel 601, so that the gas in the gas tank 7 can pass through the starting button 6, and after the pressing rod 604 is released, the third spring 605 pushes the second blocking block 602 to move upward to block the second channel 601 and cut off the second channel 601.

[0025] Please refer to Figure 4In the embodiment, a first passage 401 is formed in the inner side of the damper closing cylinder 4, a vent hole 402 is arranged above the damper closing cylinder 4, a first blocking block 403 is arranged in the inner side of the damper closing cylinder 4 in a sliding sealing manner, a second spring 404 is arranged at the bottom of the first blocking block 403, a valve hole 101 is arranged at the air inlet of the engine body 1, and the valve hole 101 is connected with the first passage 401 for mutual communication; when gas enters the vent hole 402, the first blocking block 403 is pushed to move downward, thereby opening the first passage 401 so that the engine body 1 can normally intake air, and when the gas pressure in the vent hole 402 is reduced, the second spring 404 pushes the first blocking block 403 to move upward to close the first passage 401, so that the engine body 1 cannot intake air.

[0026] When the pressing rod 604 is pressed, the vent hole 603 is communicated with the second passage 601, so that the gas in the gas storage tank 7 can pass through the starting button 6, the gas enters the pilot control valve 2 from the third air inlet 203 of the pilot control valve 2 and pushes the sealing sliding block 205 to move to open the second air inlet 202 and the air outlet 204, at this time, the gas can enter the oil control valve 3 from the first air inlet 201 or the second air inlet 202 of the oil control valve 3 and enter the vent hole 402 from the air outlet 204, when the gas enters the vent hole 402, the first blocking block 403 is pushed to move downward, thereby opening the first passage 401 so that the engine body 1 can normally intake air, at this time, the vehicle can be normally started, then the pressing rod 604 is released, the first spring 207 of the pilot control valve 2 pushes the sealing sliding block 205 to reset to block the second air inlet 202, at this time, there are two cases, when the oil pressure is normal, the oil pressure can make the sealing sliding block 205 of the oil control valve 3 block the air outlet 204 or the first air inlet 201 of the oil control valve 3, so that the gas in the vent hole 402 cannot be discharged or the gas pressure in the vent hole 402 is consistent with the gas pressure in the gas storage tank 7, thereby keeping the first passage 401 open, when the oil pressure is insufficient, the first spring 207 of the oil control valve 3 pushes the sealing sliding block 205 to block the second air inlet 202, thereby cutting off the gas passage between the gas storage tank 7 and the oil control valve 3, at this time, the gas in the vent hole 402 enters the oil control valve 3 from the air outlet 204 of the oil control valve 3 and enters the pilot control valve 2 from the air outlet 204 of the pilot control valve 2, since the starting button 6 is in the closed state at this time, the gas can enter the throttle valve 5 from the first air inlet 201 of the pilot control valve 2 and be discharged, so that the second passage 601 is closed, at this time, the engine body 1 cannot intake air and is thus stopped and extinguished.

[0027] Through the above steps, by setting by the gas supply assembly to provide high pressure gas, and using the pilot control valve 2 and oil control valve 3 to switch the air passage, using the air pressure to open the air door to shut off the cylinder 4 to make the air inlet passage when the vehicle starts, the oil control valve 3 can normally intake to start, when the engine oil pressure is low, the internal passage of the oil control valve 3 changes, the gas in the air door to shut off the cylinder 4 is discharged, the air door to shut off the cylinder 4 closes the air inlet passage, at this time the engine body 1 cannot intake to stop and shut down, prevent the engine from being damaged and even on fire due to lack of oil lubrication.

Claims

1. A pneumatic low oil protection device for a diesel engine, comprising an engine body (1); characterized in that: The application also comprises a pilot control valve (2) and a gas supply assembly, the pilot control valve (2) is arranged above the engine body (1) to control the airflow, an oil control valve (3) is arranged on one side of the pilot control valve (2) to control the airflow, a throttle closing cylinder (4) is arranged on one side of the oil control valve (3) to control the air intake of the engine body (1), a throttle valve (5) is arranged on one side of the pilot control valve (2) to control the airflow, the gas supply assembly is arranged on one side of the throttle valve (5) to provide the gas, a first air inlet (201) and a second air inlet (202) are arranged above the pilot control valve (2), an air outlet (204) is arranged at the bottom of the pilot control valve (2), a third air inlet (203) is arranged on one side of the pilot control valve (2), and the pilot control valve (2) and the oil control valve (3) have the same internal structure.

2. A pneumatic low oil level protection device for a diesel engine according to claim 1, characterized in that: A sealing slider (205) is arranged on the inner side of the pilot control valve (2), the sealing slider (205) is in sliding sealing connection with the pilot control valve (2), connecting rods (208) are arranged on the two sides of the sealing slider (205), push plates (206) are arranged at the two ends of the connecting rods (208), a first spring (207) is arranged on the outer side of the push plate (206) on one side, and the sealing slider (205) only blocks the first air inlet (201) or the second air inlet (202) after moving to the limit stroke.

3. A pneumatic low oil level protection device for a diesel engine as defined in claim 1, characterized in that: The gas supply assembly comprises a starting button (6) and a gas storage tank (7), the starting button (6) is arranged on one side of the throttle valve (5), the gas storage tank (7) is arranged on one side of the starting button (6), the starting button (6) is located in the cab, and the position of the gas storage tank (7) can be placed in the cab or the engine compartment according to the actual situation.

4. A pneumatic low oil level protection device for a diesel engine as defined in claim 1, characterized in that: A first channel (401) is arranged in the inner side of the throttle closing cylinder (4), an air vent (402) is arranged above the throttle closing cylinder (4), a first blocking block (403) is arranged in the inner side of the throttle closing cylinder (4) in sliding sealing, a second spring (404) is arranged at the bottom of the first blocking block (403), an air valve (101) is arranged at the air inlet of the engine body (1), and the air valve (101) is connected and communicated with the first channel (401).

5. A pneumatic low oil level protection device for a diesel engine as defined in claim 3, characterized in that: A second channel (601) is arranged in the inner side of the starting button (6), a second blocking block (602) is arranged in the inner side of the starting button (6) in sliding sealing, a third spring (605) is arranged at the bottom of the second blocking block (602), an air vent (603) is arranged in the inner side of the second blocking block (602), and a pressing rod (604) is arranged above the second blocking block (602).

6. A pneumatic low oil level protection device for a diesel engine as defined in claim 1, characterized in that: The first air inlet (201) of the pilot control valve (2) is connected and communicated with the throttle valve (5), the second air inlet (202) of the pilot control valve (2) is connected and communicated with the gas storage tank (7), the third air inlet (203) of the pilot control valve (2) is connected and communicated with the throttle valve (5), and the air outlet (204) of the pilot control valve (2) is connected and communicated with the first air inlet (201) of the oil control valve (3).

7. A diesel engine air controlled low oil protection device as defined in claim 4 wherein: The second air inlet (202) of the engine oil control valve (3) is connected and communicated with the gas storage tank (7), the air outlet (204) of the engine oil control valve (3) is connected and communicated with the air vent (402), one side of the engine body (1) is provided with an engine oil pressure test port (102), and the engine oil pressure test port (102) is connected and communicated with the third air inlet (203) of the engine oil control valve (3).

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