CN113685243B

CN113685243B - Engine oil pump system

Info

Publication number: CN113685243B
Application number: CN202110821559.0A
Authority: CN
Inventors: 刘伟; 叶拓; 邓彬; 刘安民; 吴远志
Original assignee: Hunan Institute of Technology
Current assignee: Hunan Institute of Technology
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2023-01-17
Anticipated expiration: 2041-07-20
Also published as: CN113685243A

Abstract

The engine oil pump system comprises an oil pan, an oil pump, a cooler and an oil filling channel communicated with all the parts, wherein the oil pan is designed in a sandwich manner, at least one partition plate is arranged in the sandwich layer to divide the sandwich layer into two independent oil storage cavities, and the top of the sandwich layer is provided with an oil leakage hole through which oil can pass in a single direction; an oil suction pipe is arranged in the oil storage cavity on the right side and is communicated with an oil pump, and an outlet of the engine oil pump is communicated with oil filling channels of various lubricating parts of the engine. This engine oil pump system can realize the preheating of engine fast, simultaneously, when facing complicated rugged road surface, can keep the oil feed of lubricating oil stable constantly, reduces fuel feeding energy consumption, simultaneously, because turbocharged pressure is unanimous with engine load curve, consequently, crankcase pressurized pressure also can keep unanimous with engine load constantly, is favorable to keeping oil feed pressure to satisfy various operating modes.

Description

Engine oil pump system

Technical Field

The invention relates to the technical field of engines, in particular to an engine oil pump system.

Background

The engine is the heart of an automobile, when the engine is started, the viscosity of lubricating oil is high, particularly in winter in northern China, the outdoor temperature can reach minus 30 degrees, the lubricating oil of the engine even becomes solid, the starter is not dragged when the engine is started, and the starter and the timing belt of the engine are seriously damaged. After the engine is started for about one minute, because the temperature is low and the lubricating oil film is too thick, the lubricating effect cannot be achieved, the abrasion of a piston ring and a valve is very serious, and the service life of the engine is directly influenced.

In another situation, the requirement on the engine is severe, when the vehicle faces a rugged road surface, the inclination angle of the vehicle body of the off-road vehicle type can reach 30-45 degrees, and at this time, the oil suction port of the oil pump is inclined to expose the oil liquid level, so that the oil pump fails to pump oil.

In conclusion, the design and development of the engine oil pump system which is suitable for severe conditions such as low-temperature starting, vehicle inclination, frequent vibration and the like can greatly improve the reliability and durability of the vehicle.

Disclosure of Invention

The present invention is directed to an engine oil pump system that solves the problems noted in the background.

In order to solve the technical problems, the invention adopts the following technical scheme: the engine oil pump system comprises an oil pan, an oil pump, a cooler and an oil filling channel communicated with all the parts, wherein the oil pan is designed in a sandwich manner, at least one partition plate is arranged in the sandwich layer to divide the sandwich layer into two independent oil storage cavities, and the top of the sandwich layer is provided with an oil leakage hole through which oil can pass in a single direction; an oil suction pipe is arranged in the oil storage cavity on the right side and is communicated with an oil pump, and an outlet of the engine oil pump is communicated with oil filling channels of various lubricating parts of the engine.

Furthermore, an oil cooler is arranged on a pipeline of the oil pump outlet communicated with the oil injection channel, a bypass pipe is further arranged beside the oil cooler, and a temperature control valve is arranged on the bypass pipe.

Still further, the engine oil pump system further comprises an air compression system communicated with fresh air compressed by the supercharger, the air compression system comprises a compressed air pipeline communicated with an engine crankcase and an electromagnetic valve arranged on the pipeline, a pressure sensor is further arranged in the crankcase, and the vehicle ECU controls the electromagnetic valve to be opened and closed according to signals of the pressure sensor.

Furthermore, a float valve is arranged on the partition board between the two oil storage chambers, and when the liquid level in the right oil storage chamber is lower than the set liquid level, the float valve loses buoyancy and opens the valve.

In order to make oil preferentially fall into the oil storage cavity on the right side, the top plate right side of the interlayer of the oil pan is concave inwards to form a low region, and the low region is provided with a plurality of one-way oil leakage holes.

The invention has the beneficial effects that: the engine oil pump system can quickly realize the preheating of the engine at the initial starting stage of the engine with lower temperature, and simultaneously can constantly keep the oil supply stability of lubricating oil when facing a complex rugged road surface; in addition, the engine oil pump system adopts the fresh air sucked by starting the exhaust gas turbocharging to pressurize the crankcase, so that the oil supply energy consumption can be reduced, and meanwhile, the turbocharging pressure is consistent with the engine load curve, so that the crankcase pressurization pressure can also be constantly kept consistent with the engine load, and the oil supply pressure can be favorably kept to meet various working conditions.

Drawings

FIG. 1 is a schematic diagram of an engine oil pump system as is described herein;

FIG. 2 is a schematic structural diagram of the left oil chamber top plate and the right oil chamber top plate and the left oil chamber top plate and the right oil chamber top plate after left and right positions are interchanged in the embodiment of the invention.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Further, in the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features may be in contact by another feature not in direct contact but in contact with each other. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention.

Examples

An engine oil pump system as shown in fig. 1 is installed on an existing engine, and mainly comprises an oil pan 1, an oil pump 2, a cooler 3 and an oil filling channel (an outlet of the oil filling channel is a friction pair of parts needing lubrication) for communicating all parts, wherein the oil pan 1 is installed at the bottom of an engine frame and is connected with the engine frame, a cavity formed between the oil pan 1 and the engine frame is a crankcase, the oil pan 1 adopts a sandwich type design as shown in fig. 1, a sandwich layer 1a is provided with a partition plate 1b, the sandwich layer is divided into two independent oil storage cavities (a left oil storage cavity 1c and a right oil storage cavity 1 d) by the partition plate 1b, and a top plate at the top of the sandwich layer is provided with an oil leakage hole 1e which can enable oil dripping from lubricating parts such as an engine crankshaft, a piston and the like to pass through in a single direction; an oil suction pipe 4 is arranged in the oil storage cavity 1d on the right side, the oil suction pipe 4 is communicated with an oil pump 2, and an outlet of the oil pump 5 is communicated with oil filling channels of various lubricating parts of the engine. The oil leakage holes are designed to pass in a single direction, and mainly mean that after oil drops to a top plate of the interlayer from parts lubricated by an engine, the oil can enter the two oil storage cavities through the oil leakage holes and cannot overflow into the crankcase from the oil storage cavities, and when a vehicle runs on a bumpy road, the oil can be stored in the oil storage cavities so as not to generate liquid level fluctuation and influence pumping and pumping.

In order to ensure that the engine is cooled and lubricated reasonably and excessive cooling does not occur, the volumes of the left oil storage chamber 1c and the right oil storage chamber 1d in the interlayer are approximately equal to the lubricating oil liquid needed by the engine for lubricating and cooling.

Because the temperature of oil liquid at the initial stage of starting the engine is low, an organic oil cooler 5 is arranged on a pipeline communicated with an oil injection channel at the outlet of the oil pump 2, a bypass pipe 6 is also arranged beside the oil cooler 5, and a temperature control valve 6a is arranged on the bypass pipe.

Adopt the engine oil pump system of above-mentioned design, its theory of operation is: when the engine is in cold start, the cylinder needs to be warmed so as to reasonably lubricate all lubricating parts of the vehicle, and simultaneously, the body of the engine is at a higher temperature, which is favorable for reducing the emission in the initial start stage.

Furthermore, in some extremely cold areas, the low-temperature cold start is very difficult, the heat loss of the engine of the vehicle is fast, in order to ensure smooth ignition, a heat insulation material layer can be further arranged in the right oil storage cavity, so that the heat loss is reduced, meanwhile, an oil liquid heating device is also arranged, the low-temperature fluidity is increased by heating lubricating oil, the friction force of parts at the initial stage of the engine start is reduced, and the low-temperature start performance is improved.

In order to save energy consumption of an engine oil pump under high power, the engine oil pump system is also provided with a set of air compression system for improving oil suction pressure of the engine oil pump, the air compression system is communicated with a fresh air pipeline after being compressed by a supercharger 10, the air compression system is composed of a compressed air pipeline 7 communicated with an engine crankcase, an electromagnetic valve 7a arranged on the pipeline, a pressure sensor arranged in the crankcase and a rotating speed sensor on a crankshaft, and an ECU of a vehicle controls the opening and closing of the electromagnetic valve according to signals of the pressure sensor. The basic principle is that after the supercharger of the engine is started, the pressure sensor in the crankcase measures the air pressure in the crankcase, the rotating speed sensor senses the rotating speed so as to judge the load of the engine, after the signals of the pressure sensor and the rotating speed are transmitted to the ECU, the ECU controls the opening and closing of the electromagnetic valve according to a preset program, and the pressure in the crankcase is controlled by controlling the air inflow of the pressurized fresh air. In the high load state, the pressure of the lubricating oil of the engine needs to be correspondingly increased, the method in the prior art adjusts the oil supply pressure by increasing the rotating speed of the oil pump of the engine, and the method adopts a mode of opening a compressed air pipeline to realize the pressurization of the oil entering the oil pump in advance, so that the pressure difference of the boosting of the oil pump is reduced, and the operation energy consumption of the oil pump is reduced. In addition, the crankcase is adopted for pressurization, the phenomenon of gas leakage of the engine cylinder (gas leakage is that fuel gas in the engine cylinder enters the crankcase through the piston ring, so that the concentration of oil mist in the crankcase is increased, and explosion risks are caused.

After the engine enters a normal load state, the oil in the two oil storage chambers should participate in lubrication, and a person skilled in the art knows that in order to keep the energy loss of the engine low, the consumption of lubricating oil and cooling water should be kept at a level just meeting the heat dissipation and lubrication requirements of the best power state, so once the engine enters a normal operation, all the lubricating oil in the oil storage chambers should be circulated, therefore, the invention further provides a float type valve 8 on the partition board of the two oil storage chambers, and in a high load state, the oil in the right oil storage chamber is not enough to supply the high load lubrication requirement of the engine, so when the liquid level in the right oil storage chamber is lower than a set liquid level (the state is that the engine enters a medium-high load operation from an idle speed), the float type valve opens the valve due to the fact that the liquid level is reduced and loses enough buoyancy.

In order to reduce unnecessary heat brought away by oil liquid in the idling cylinder warming stage, the oil liquid needs to preferentially fall into an oil storage cavity on the right side, so that a low-level area 1f is formed in the inner concave portion on the right side of a top plate of an interlayer of an oil pan, and a plurality of oil leakage holes which pass in a single direction are formed in the low-level area.

As shown in fig. 2, in order to increase the heat dissipation performance of the engine in a high load state, a heat dissipation fin is further arranged outside the oil storage cavity on the left side of the engine, and meanwhile, the top plate at the top of the interlayer is adaptively designed into a movable structure which is consistent with the size of the oil cavity and comprises a left oil cavity top plate and a right oil cavity top plate, the middle part of the right oil cavity top plate is recessed to form a recessed oil storage area, and the left oil cavity top plate is planar; the left oil cavity top plate and the right oil cavity top plate can move in a mutual transposition mode while the top of the whole interlayer is kept closed. It should be noted that, in order to achieve the above functions, especially the positions of the left oil chamber top plate and the right oil chamber top plate are interchanged, a linkage chain drive or a slide rail mechanism may be adopted, but these can be achieved by those skilled in the art.

The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.

Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.

Claims

1. The engine oil pump system comprises an oil pan, an oil pump, a cooler and oil filling channels communicated with all parts, and is characterized in that: the oil pan adopts a sandwich type design, at least one partition plate is arranged in the sandwich layer to divide the sandwich layer into two independent oil storage cavities, and the top of the sandwich layer is provided with an oil leakage hole which can enable oil to pass through in a single direction; an oil suction pipe is arranged in the oil storage cavity on the right side and is communicated with an oil pump, and an outlet of the engine oil pump is communicated with oil filling channels of various lubricating parts of the engine; the right side of a top plate of an interlayer of the oil pan is concave inwards to form a low area, and the low area is provided with a plurality of oil leaking holes which pass in one direction; the engine oil pump system further comprises an air compression system for communicating fresh air compressed by the supercharger, the air compression system comprises a compressed air pipeline communicated with an engine crankcase and a solenoid valve arranged on the pipeline, a pressure sensor is further arranged in the crankcase, a rotating speed sensor is arranged beside an engine crankshaft, the vehicle ECU controls the solenoid valve to be opened and closed according to signals of the pressure sensor and the rotating speed sensor, a float type valve is arranged on a partition plate between two oil storage cavities, and when the liquid level in the oil storage cavity on the right side is lower than a set liquid level, the float type valve loses buoyancy and enables the valve to be opened.

2. The engine oil pump system of claim 1, wherein: an oil cooler is arranged on a pipeline of the oil pump outlet communicated with the oil injection channel, a bypass pipe is further arranged beside the oil cooler, and a temperature control valve is arranged on the bypass pipe.