An engine oil supply system and a vehicle

Abstract

The present application provides an engine oil supply system and a vehicle, relating to the technical field of engine lubrication. The engine oil supply system includes an oil pan, an oil pump and a main oil pipe, and further includes: a main suction pipe for sucking the engine oil at the front end of the oil pan; a secondary suction pipe for sucking the engine oil at the rear end of the oil pan; a reversing solenoid valve for connecting the main oil pipe to the main suction pipe or connecting the main oil pipe to the secondary suction pipe; a controller for obtaining the tilt angle of the oil pan and controlling the reversing solenoid valve to enter a first state or a second state to supply engine oil according to the tilt angle; so as to ensure stable supply of engine oil in a large tilt angle state, and at the same time, it has the advantages of low cost, high degree of light weight, high reliability and strong working condition adaptability.

Description

Technical Field

[0001] This application relates to the technical field of engine lubrication, and particularly to an engine oil supply system and a vehicle. Background Art

[0002] Engine lubrication plays a crucial role in the reliability of the engine. An ordinary engine oil supply system generally only meets the long-term operation within an inclination angle of ±15°. For engines used in engineering dump trucks, mining trucks, and construction machinery, they often work in a large inclination state, and the engine oil in the oil pan tends to one side, often requiring complex mechanical designs to ensure oil suction under large inclination angles.

[0003] Currently, generally, methods such as double oil pumps and double-chamber oil pans are used to meet oil suction under large inclination angles. A double oil pump means setting 2 oil pumps. One oil pump is the main oil pump connected to the engine's oil inlet, and the other is the auxiliary oil pump. When in a large inclination state, the suction pipe connected to the main oil pump is separated from the oil level, and at this time, the auxiliary oil pump sucks the engine oil in the oil pan to the suction pipe corresponding to the main oil pump to supply oil to the engine. The double-chamber oil pan divides the oil pan into 2 independent chambers, and makes the engine oil in one chamber flow unidirectionally to the other chamber with a suction pipe through a one-way valve or a pump.

[0004] Although the above methods can meet oil suction under large inclination angles, they have complex structures, high costs, significantly increase the weight of the oil supply system, and the power consumption also increases accordingly. Summary of the Invention

[0005] This application provides an engine oil supply system and a vehicle to solve the problem that the existing oil supply system is difficult to supply oil to the engine under an inclined state.

[0006] To solve the above problems, this application adopts the following technical solutions

[0007] In a first aspect of an embodiment of this application, an engine oil supply system is provided, including an oil pan, an oil pump, and a main oil pipe. The inlet of the oil pump is communicated with the main oil pipe, and the outlet of the oil pump is communicated with the inlet of the engine; it further includes:

[0008] A main suction pipe for sucking the engine oil at the front end of the oil pan;

[0009] An auxiliary suction pipe for sucking the engine oil at the rear end of the oil pan;

[0010] A reversing solenoid valve for communicating the main oil pipe with the main suction pipe, or for communicating the main oil pipe with the auxiliary suction pipe;

[0011] A controller, which is used to obtain the tilt angle of the oil pan and control the reversing solenoid valve to enter the first state or the second state according to the tilt angle to supply engine oil;

[0012] Wherein, when the reversing solenoid valve enters the first state, the main oil pipe is communicated with the main oil suction pipe; when the reversing solenoid valve enters the second state, the main oil pipe is communicated with the auxiliary oil suction pipe.

[0013] In a possible design, a first sensor is arranged on the oil pan, and the controller is used for:

[0014] Obtaining the tilt angle of the oil pan through the first sensor.

[0015] In a possible design, the controller is specifically used for:

[0016] If the tilt angle is less than the tilt angle limit value, control the reversing solenoid valve to enter the first state to supply engine oil;

[0017] If the tilt angle is greater than or equal to the tilt angle limit value, control the reversing solenoid valve to enter the second state to supply engine oil.

[0018] In a possible design, the controller is specifically used for:

[0019] Within a preset time period, if the obtained tilt angle of the oil pan continuously is less than the tilt angle limit value, control the reversing solenoid valve to enter the first state to supply engine oil;

[0020] Within a preset time period, if the obtained tilt angle of the oil pan continuously is greater than or equal to the tilt angle limit value, control the reversing solenoid valve to enter the second state to supply engine oil to the engine;

[0021] Otherwise, control the reversing solenoid valve to maintain the original state to supply engine oil.

[0022] In a possible design, a second sensor is arranged between the oil pump and the engine, and the controller is specifically used for:

[0023] Obtaining the oil pressure in the oil pipe between the oil pump and the engine through the second sensor;

[0024] When the reversing solenoid valve is in the second state to supply engine oil, if the oil pressure is less than the pressure limit value and the duration of the oil pressure being less than the pressure limit value is equal to the time limit value, control the reversing solenoid valve to enter the first state to supply engine oil;

[0025] When the reversing solenoid valve is in the first state and supplies engine oil, if the oil pressure is less than the pressure limit value and the duration of the oil pressure being less than the pressure limit value is equal to the time limit value, an oil pressure loss alarm signal is issued.

[0026] In a possible design, the controller is specifically configured to:

[0027] Obtain the operating state of the reversing solenoid valve;

[0028] If the operating state of the reversing solenoid valve is normal, obtain the tilt angle;

[0029] If the operating state of the reversing solenoid valve is abnormal, control the reversing solenoid valve to maintain the first state to supply engine oil until the operating state of the reversing solenoid valve is normal, and then obtain the tilt angle.

[0030] In a possible design, a first oil storage cavity is provided at the front end of the oil pan, and a second oil storage cavity is provided at the rear end. Both the first oil storage cavity and the second oil storage cavity are grooves provided at the bottom of the oil pan. The main suction pipe sucks the engine oil in the first oil storage cavity, and the auxiliary suction pipe sucks the engine oil in the second oil storage cavity.

[0031] In a possible design, the cross-sectional dimension of the first oil storage cavity is larger than that of the second oil storage cavity.

[0032] In a possible design, check valves are provided between the main suction pipe and the reversing solenoid valve, and between the auxiliary suction pipe and the reversing solenoid valve.

[0033] The second aspect of the embodiments of the present application provides a vehicle, which includes an engine and the engine oil supply system according to any one of the above. The engine oil supply system is used to supply engine oil to the engine.

[0034] The beneficial effects of the present application: The engine oil supply system and vehicle provided by the present application include a main suction pipe, an auxiliary suction pipe, a reversing solenoid valve and a controller. The main suction pipe and the auxiliary suction pipe are connected to the main oil pipe through the reversing solenoid valve, so as to supply oil to the oil pump through the main suction pipe or the auxiliary suction pipe under the control of the controller. That is, the controller obtains the tilt angle of the oil pan and controls the reversing solenoid valve according to the tilt angle of the oil pan, so that the reversing solenoid valve enters the first state or the second state to supply engine oil, so that the engine can work stably for a long time in a large tilt angle state, and there is no need for complex mechanical design, and it has the characteristics of low cost, high lightweight degree and high reliability.

[0035] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become easily understandable through the following description. Brief Description of the Drawings

[0036] The drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0037] Figure 1 Structural schematic diagram of the engine oil supply system provided for the embodiment of the present application;

[0038] Figure 2 Working process of the engine oil supply system provided for the embodiment of the present application Figure 1 ;

[0039] Figure 3 Working process of the engine oil supply system provided for the embodiment of the present application Figure 2 .

[0040] Reference Signs:

[0041] 1 - oil pan, 2 - auxiliary suction pipe, 3 - main suction pipe, 4 - check valve, 5 - reversing solenoid valve, 6 - oil pump, 7 - oil pipe, 8 - second sensor, 9 - slope sensor, 10 - transmission TCU, 11 - engine ECU, 12 - vehicle instrument panel.

[0042] Through the above drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Description of the Embodiments

[0043] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.

[0044] The meanings of some terms used in the present application are explained as follows:

[0045] Oil pan: It is the outer shell that encloses the crankcase as an oil storage tank. It can prevent impurities from entering, collect and store the lubricating oil flowing back from each friction surface of the engine, dissipate part of the heat, and prevent the engine oil from oxidizing. Among them, the oil pans mentioned in the embodiments of this application all refer to wet oil pans. During the operation of the engine, the crank throws of the engine crankshaft and the big ends of the connecting rods are immersed in the engine oil in the oil pan once every time the crankshaft rotates one week, playing a lubricating role.

[0046] Oil pump: A component used to increase the oil pressure and ensure a certain amount of oil to forcibly supply oil to each friction surface of the engine.

[0047] Engineering dump trucks, mining trucks, and construction machinery engines often need to work at large inclination angles. At large inclination angles, the engine oil in the oil pan tends to one side. For an engine oil supply system that normally operates within an inclination angle of ±15°, it is difficult to continue supplying oil to the engine at this time.

[0048] In the related art, mainly double oil pumps, double-stage oil pumps, and double-chamber oil pans are used to meet the requirements of oil supply at large inclination angles. However, such an oil supply method has an extremely complex structure, resulting in high transformation costs. Moreover, the use of double oil pumps not only increases power consumption but also significantly increases the weight of the entire system.

[0049] In response to this, this application provides an engine oil supply system controlled by a controller to meet the usage requirements of vehicles and engineering equipment that need to be used at large inclination angles. It includes an oil pan 1, an oil pump 6, a main oil pipe, a main suction pipe 3, a secondary suction pipe 2, a reversing solenoid valve 5, and a controller. The suction ports of the main suction pipe 3 and the secondary suction pipe 2 are located at different positions of the oil pan 1. When at different inclination angles, the controller can control the reversing solenoid valve 5 to connect the main suction pipe 3 to the main oil pipe for oil supply, or connect the secondary suction pipe 2 to the main oil pipe for oil supply, so as to switch the main suction pipe 3 or the secondary suction pipe 2 to supply oil to the oil pump 6, realizing stable oil supply at large inclination angles.

[0050] Hereinafter, the embodiments of this application will be described in more detail with reference to the accompanying drawings. It can be understood that the following embodiments can be combined arbitrarily, and similar designs in some embodiments may not be repeated.

[0051] Figure 1 For the schematic diagram of the engine oil supply system provided by the embodiments of this application, please refer to Figure 1As shown in the figure, this embodiment provides an engine oil supply system. Similar to the existing engine oil supply system, it includes an oil pan 1, an oil pump 6, and a main oil pipe. The oil pan 1 is used to contain engine oil. The inlet of the oil pump 6 is connected to the main oil pipe, and the outlet of the oil pump 6 is connected to the engine's inlet. Of course, they are still connected by an oil pipe between them. That is, the oil pump 6, as a power source, sends the engine oil in the oil pan 1 to the engine for lubrication.

[0052] The difference in this embodiment is that it further includes a main suction pipe 3, a secondary suction pipe 2, a reversing solenoid valve 5, and a controller. Among them, the main suction pipe 3 is used to suck the engine oil at the front end of the oil pan 1, the secondary suction pipe 2 is used to suck the engine oil at the rear end of the oil pan 1, the reversing solenoid valve 5 is used to connect the main oil pipe to the main suction pipe 3 or connect the main oil pipe to the secondary suction pipe 2, and the controller is connected to the reversing solenoid valve 5 to control the reversing solenoid valve 5.

[0053] Specifically, during the operation of the engine, the controller obtains the tilt angle of the oil pan 1 and controls the reversing solenoid valve 5 to enter the first state or the second state to supply engine oil according to the tilt angle. Here, the first state means that when the reversing solenoid valve 5 is in the current state, the main oil pipe is connected to the main suction pipe 3. When the oil pump runs, it sucks the engine oil in the oil pan 1 through the main suction pipe 3. The second state here means that when the reversing solenoid valve 5 is in the current state, the main oil pipe is connected to the secondary suction pipe 2. When the oil pump runs, it sucks the engine oil in the oil pan 1 through the secondary suction pipe 2.

[0054] Among them, the way for the controller to obtain the tilt angle of the oil pan 1 can be to directly install a first sensor on the oil pan 1. The first sensor can be a common inclination sensor. The first sensor is connected to the controller, and the controller directly obtains the tilt angle of the oil pan 1 through the first sensor.

[0055] In addition, the oil pan 1 will tilt synchronously with the equipment that loads the engine and the engine oil supply system. And generally, equipment such as vehicles are equipped with a slope sensor 9 for measuring the tilt angle. At this time, the controller can be connected to the slope sensor 9 and indirectly obtain the tilt angle of the oil pan 1 by obtaining the tilt angle of the equipment.

[0056] When the engine oil supply system in this embodiment is installed on the standby equipment to supply oil to the engine, if the standby equipment moves to work in a large inclination state, the controller will obtain the inclination angle of the oil pan 1 in the current state. From the inclination angle, the state of the engine oil in the oil pan 1 can be known, and according to the inclination angle, the reversing solenoid valve 5 is controlled to enter the first state or the second state to supply oil to the engine. That is, through the cooperation between the reversing solenoid valve 5, the main suction pipe 3, and the auxiliary suction pipe 2, it is ensured that when the standby equipment is in a large inclination state, the engine can still be stably supplied with oil, ensuring the normal use of the engine.

[0057] In addition, for the entire engine oil supply system, there is no need to carry out complex mechanical structure design. Only the main suction pipe 3, the auxiliary suction pipe 2, the reversing solenoid valve 5, and the controller need to be added. The weights of the main suction pipe 3, the auxiliary suction pipe 2, the reversing solenoid valve 5, and the controller are all relatively light, and the occupied space is not much. It will not affect the installation of other components of the standby equipment, nor will it excessively increase the overall weight of the standby equipment. It has the advantages of light weight, low cost, and can adapt to the use in a large inclination state.

[0058] On the basis of the previous embodiment, a first oil storage cavity is provided at the front end of the oil pan 1, and a second oil storage cavity is provided at the rear end. Both the first oil storage cavity and the second oil storage cavity are grooves provided at the bottom of the oil pan 1. The upper parts of the first oil storage cavity and the second oil storage cavity are connected. When the oil pan 1 is tilted, the engine oil in the first oil storage cavity and the second oil storage cavity can flow into each other with the change of the inclination angle. The main suction pipe 3 sucks the engine oil in the first oil storage cavity, and the auxiliary suction pipe 2 sucks the engine oil in the second oil storage cavity. Specifically, the lower end of the main suction pipe 3 can be inserted into the first oil storage cavity and close to the bottom of the first oil storage cavity. Of course, there is still a certain gap between the main suction pipe 3 and the bottom of the first oil storage cavity to facilitate the engine oil to enter the main suction pipe 3. The lower end of the auxiliary suction pipe 2 is inserted into the second oil storage cavity and close to the bottom of the second oil storage cavity, and there is still a certain gap between the auxiliary suction pipe 2 and the bottom of the second oil storage cavity to facilitate the engine oil to enter the auxiliary suction pipe 2.

[0059] Among them, the main suction pipe 3 and the auxiliary suction pipe 2 can be located in the middle or at the edge of the first oil storage cavity and the second oil storage cavity respectively, as long as the engine oil in the first oil storage cavity / second oil storage cavity can be smoothly sucked. That is, during the use process, the oil pan 1 mainly has three states, namely, forward tilt (the engine oil in the oil pan 1 is concentrated at the first oil storage cavity), horizontal (the oil pan 1 remains in a horizontal state), and backward tilt (the engine oil in the oil pan 1 is concentrated at the second oil storage cavity). The first oil storage cavity and the second oil storage cavity are both grooves provided at the bottom of the oil pan 1, which can make the engine oil gather in the first oil storage cavity or the second oil storage cavity when the oil pan 1 is in the corresponding inclined state, so that the oil pump 6 can always extract the engine oil to supply the engine and lubricate the engine.

[0060] Based on the above embodiments, the cross-sectional dimension of the first oil storage cavity can be made larger than that of the second oil storage cavity, that is, the capacity of the first oil storage cavity is greater than that of the second oil storage cavity. When the amount of engine oil stored in the oil pan 1 is not much, it is difficult for the engine oil in the first oil storage cavity and the second oil storage cavity to flow into each other when the oil pan 1 is tilted. And since the capacity of the first oil storage cavity is greater than that of the second oil storage cavity, when the oil storage in the oil pan 1 is insufficient, the first oil storage cavity can still leave emergency engine oil in it. At this time, the main oil suction pipe 3 can temporarily supply emergency oil to the engine, so as to leave enough time for the staff to add engine oil to the oil pan 1. Of course, it can also be that the cross-sectional dimension of the second oil storage cavity is larger than that of the cross-section of the first oil storage cavity. It's just that the first oil storage cavity is in the front, and during installation, it can better adapt to the overall structural characteristics of the engineering machinery equipment.

[0061] Based on the previous embodiment, check valves 4 can also be provided between the main oil suction pipe 3 and the reversing solenoid valve 5, and between the auxiliary oil suction pipe 2 and the reversing solenoid valve 5. Among them, the check valve 4 can be understood as a one-way valve, that is, it can only allow engine oil to enter the reversing solenoid valve 5 from the main oil suction pipe 3 or the auxiliary oil suction pipe 2 through the check valve 4, and it is impossible for the engine oil to flow reversely. Here, "between" can be understood as directly installing the check valve 4 on the main oil suction pipe 3 and the auxiliary oil suction pipe 2, or a connecting oil pipe can be provided between the main oil suction pipe 3 and the reversing solenoid valve 5, and between the auxiliary oil suction pipe 2 and the reversing solenoid valve 5, and the check valve 4 can be installed on this oil pipe. During use, due to the presence of the check valve 4, it can effectively prevent the engine oil from flowing back into the oil pan 1, thus ensuring the supply effect of the engine oil. For example, when supplying engine oil through the main oil suction pipe 3, it can prevent the engine oil from flowing back into the oil pan 1 from the auxiliary oil suction pipe 2, thus ensuring the one-way flow of the engine oil.

[0062] Figure 2 The working process of the engine oil supply system provided by the embodiments of the present application Figure 1 , please refer to Figure 2 As shown, based on the above embodiments, the working process of the engine oil supply system provided in this example is as follows:

[0063] S201. Obtain the tilt angle of the oil pan 1;

[0064] Specifically, the tilt angle of the oil pan 1 can be directly obtained through the first sensor installed on the oil pan 1, or the tilt angle of the oil pan 1 can be indirectly obtained through the engineering machinery equipment loaded with the engine oil supply system. Of course, the tilt angle here refers to the angle between the plane where the bottom of the oil pan 1 is located and the horizontal plane. For example, when tilted forward, it is -90° - 0°, when tilted backward, it is 0 - 90°, and when in a horizontal state, it is 0°.

[0065] S202. Control the reversing solenoid valve 5 to enter the first state or the second state according to the tilt angle to supply engine oil:

[0066] If the tilt angle is less than the tilt limit value, control the reversing solenoid valve 5 to enter the first state to supply engine oil;

[0067] If the tilt angle is greater than or equal to the tilt limit value, control the reversing solenoid valve 5 to enter the second state to supply engine oil.

[0068] Wherein, when the reversing solenoid valve 5 enters the first state, the main oil pipe is communicated with the main oil suction pipe 3; when the reversing solenoid valve 5 enters the second state, the main oil pipe is communicated with the auxiliary oil suction pipe 2.

[0069] Specifically, a tilt limit value is preset in advance according to the actual parameters of the engineering machinery and the oil pan 1. When the tilt angle is greater than or equal to this tilt limit value, the engine oil in the oil pan 1 mainly gathers in the second oil storage cavity, and the amount of engine oil in the first oil storage cavity is small. At this time, there is sufficient engine oil gathered at the auxiliary oil suction pipe 2, and the auxiliary oil suction pipe 2 can stably supply oil to the oil pump 6. On the contrary, a large amount of engine oil gathers in the first oil storage cavity, and the main oil suction pipe 3 can stably supply oil to the oil pump 6. That is, the main oil suction pipe 3 and the auxiliary oil suction pipe 2 cooperate with each other to effectively ensure the engine oil supply in the large tilt angle state.

[0070] Figure 3 For the working process of the engine oil supply system provided by the embodiment of the present application Figure 2 , please refer to Figure 2 As shown, taking a vehicle as an example, the embodiment of the present application will describe the engine oil supply system in detail:

[0071] First of all, the vehicle must be equipped with an engine and the engine oil supply system for supplying engine oil described in the above embodiment.

[0072] In addition, the structure of the vehicle is the same as that of the existing vehicle, and it is equipped with an automatic transmission slope sensor 9, a vehicle instrument 12, a transmission controller (transmission TCU), and an engine controller (engine ECU11).

[0073] Wherein, in order to further reduce the use difficulty and cost of the engine oil supply system, the controller can be directly replaced by the engine controller, and the first sensor is replaced by the automatic transmission slope sensor 9.

[0074] The engine ECU11 receives the road slope signal obtained by the automatic transmission slope sensor 9 collected by the transmission TCU through the CAN bus (Controller Area Network), so as to obtain the tilt angle of the oil pan 1. The engine ECU11 controls the reversing solenoid valve 5 to enter the first state or the second state according to this tilt angle to supply engine oil.

[0075] Specifically, the engineering process of the engine oil supply system is as follows:

[0076] S301. Obtain the operating state of the reversing solenoid valve 5;

[0077] S302. If the operating state of the reversing solenoid valve 5 is normal, obtain the road slope signal to obtain the tilt angle of the oil pan 1;

[0078] If the operating state of the reversing solenoid valve 5 is abnormal, control the reversing solenoid valve 5 to maintain the first state to supply oil to the engine until the operating state of the reversing solenoid valve 5 is normal, and then obtain the road slope signal.

[0079] Specifically, the engine oil supply system needs to rely on the operation of the reversing solenoid valve 5. First, detect the state of the reversing solenoid valve 5. When the reversing solenoid valve 5 can be switched without obstacles, that is, when the main suction pipe 3 or the auxiliary suction pipe 2 can supply oil normally, subsequent matching is required.

[0080] S303. Control the reversing solenoid valve 5 to enter the first state or the second state to supply oil to the engine according to the tilt angle:

[0081] If the tilt angle is continuously less than the tilt angle limit within the preset time period, control the reversing solenoid valve 5 to enter the first state to supply oil to the engine;

[0082] If the tilt angle is continuously greater than or equal to the tilt angle limit within the preset time period, control the reversing solenoid valve 5 to enter the second state to supply oil to the engine;

[0083] Otherwise, control the reversing solenoid valve 5 to maintain the original state to supply oil to the engine;

[0084] Specifically, first set a preset time period, such as 5 s. If the tilt angle of the oil pan 1 continuously obtained by the controller within this time period remains above or below the tilt angle limit, it can be determined that the tilt angle is not caused by the signal glitch of the sensor. If the tilt angle fluctuates greatly within the preset time period, it can be considered that it is caused by the signal glitch of the sensor, and no processing is required. Just keep the reversing solenoid valve 5 in its original state to supply oil to the engine, so as to avoid misjudgment of the tilt angle and improve accuracy.

[0085] S304. Obtain the oil pressure in the oil pipe 7 between the oil pump 6 and the engine;

[0086] Specifically, a second sensor 8 can be set on the oil pipe 7 that conveys oil between the oil pump 6 and the engine, and the second sensor 8 is used to obtain the oil pressure in the oil pipe and connect the second sensor 8 to the controller so that the controller can obtain the oil pressure.

[0087] S305. If the reversing solenoid valve 5 is in the second state to supply oil to the engine, the oil pressure is less than the pressure limit, and the duration of the oil pressure less than the pressure limit is equal to the time limit, then the reversing solenoid valve 5 is controlled to enter the first state to supply oil to the engine;

[0088] If the reversing solenoid valve 5 is in the first state to supply oil to the engine, the oil pressure is less than the pressure limit, and the duration of the oil pressure being less than the pressure limit is equal to the time limit, an oil pressure loss alarm signal is issued.

[0089] Specifically, the oil pressure can reflect the oil extraction status of the oil pump 6. When the oil pressure is low, it indicates that the oil pump 6 extracts less oil, which is insufficient to lubricate the engine. Since the capacity of the first oil storage chamber is greater than that of the second oil storage chamber, and the first oil storage chamber is connected to the upper part of the second oil storage chamber, during use, if the overall amount of oil in the oil pan 1 is relatively small, the oil in the first oil storage chamber and the second oil storage chamber will no longer flow to each other as the oil pan 1 tilts. At this time, the oil supply is switched from the second state to the first state, and the remaining oil in the first oil storage chamber can be used to continue to supply oil to the engine. When the oil amount is reduced to a certain value, the oil in the first oil storage chamber is also insufficient to supply oil to the engine. Then, an oil loss pressure alarm signal can be issued through the vehicle instrument 12, and the oil lamp can be lit to remind the user to check the oil condition in time and replenish the oil. After the time when the oil pressure is less than the pressure limit reaches the time limit, an oil loss pressure alarm signal is issued, thereby preventing false alarms.

[0090] For ease of understanding, the following assumes that the inclination angle limit is α, the preset time period is t, the pressure limit is P1, and the time limit is t1, to illustrate several situations that may occur during the driving of the vehicle:

[0091] (a) If the reversing solenoid valve 5 fails, the reversing solenoid valve 5 supplies oil in the first state by default. In this case, the engine oil system is the same as the oil system of ordinary road vehicles, and can ensure driving conditions on slopes within ±15°; if the slope is too large and the main oil suction pipe 3 cannot absorb oil, the oil pressure is <P1, and the oil pressure remains <P1 for a period of t1, then the engine ECU 11 sends an oil pressure loss alarm signal to the vehicle instrument 12 through the CAN line, and the oil light on the vehicle instrument 12 lights up.

[0092] (b) When the vehicle is traveling on a flat road, when the gearbox slope sensor 9 detects that the road slope (corresponding to the inclination angle of the oil pan 1) is less than α, the reversing solenoid valve 5 remains in the first state to supply oil to the engine;

[0093] If the oil pressure is ≥ P1 at this time, the oil supply is normal;

[0094] If the engine oil pressure < P1 at this time and lasts for a duration of t1, and the engine oil pressure < P1, it indicates that the oil storage in the oil pan 1 is insufficient. The engine ECU 11 sends an engine oil pressure loss alarm signal to the vehicle instrument 12 through the CAN line, and the engine oil lamp on the vehicle instrument 12 lights up to remind the user.

[0095] (c) During the vehicle going uphill, the road slope detected by the transmission slope sensor 9 ≥ α, and this status data is continuously obtained within the t period. The engine ECU 11 sends a command to the reversing solenoid valve 5 to switch the reversing solenoid valve 5 to the second state to supply engine oil;

[0096] If the engine oil pressure ≥ P1 at this time, the oil supply is normal;

[0097] If the engine oil pressure < P1 at this time and lasts for a duration of t1, and the engine oil pressure is < P1 all the time, the engine ECU 11 sends a command to the reversing solenoid valve 5 to switch the reversing solenoid valve 5 to the first state to supply engine oil; after switching to the first state:

[0098] If the engine oil pressure ≥ P1 at this time, the main oil suction pipe 33 continues to suck oil;

[0099] If the engine oil pressure < P1 at this time and lasts for a duration of t1, and the engine oil pressure < P1, it indicates a failure in the oil supply system or insufficient oil storage in the oil pan 1. The engine ECU 11 sends an engine oil pressure loss alarm signal to the vehicle instrument 12 through the CAN line, and the engine oil lamp on the vehicle instrument 12 lights up.

[0100] Generally speaking, the components added to the entire engine oil supply system are only the main oil suction pipe, the auxiliary oil suction pipe and the reversing solenoid valve. Others can directly use the original equipment of the vehicle. The hardware modification cost is low, and they are all lightweight components, which will not add extra weight to the vehicle. At the same time, it can meet the oil supply requirements of the vehicle in a large inclination state, improve the vehicle's adaptability to road conditions, and has extremely high reliability.

[0101] It should be understood that the various forms of processes shown above can be used, with steps reordered, added or deleted. For example, the steps recorded in the disclosure of this application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution disclosed in this application can be achieved. This is not limited herein.

[0102] The above specific embodiments do not constitute a limitation to the protection scope of this application. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the principles of this application should be included within the protection scope of this application.

Claims

1. An engine oil supply system, comprising an oil pan, an oil pump and a main oil pipe, wherein the inlet of the oil pump is communicated with the main oil pipe, and the outlet of the oil pump is communicated with the inlet of the engine, and is characterized in that, It further includes: A main oil suction pipe for sucking the engine oil at the front end of the oil pan; An auxiliary oil suction pipe for sucking the engine oil at the rear end of the oil pan; A reversing solenoid valve for connecting the main oil pipe to the main oil suction pipe or connecting the main oil pipe to the auxiliary oil suction pipe; A controller for obtaining the tilt angle of the oil pan and controlling the reversing solenoid valve to enter a first state or a second state to supply engine oil according to the tilt angle, wherein the controller is an engine controller; Wherein, when the reversing solenoid valve enters the first state, the main oil pipe is connected to the main oil suction pipe; when the reversing solenoid valve enters the second state, the main oil pipe is connected to the auxiliary oil suction pipe; A second sensor is provided between the oil pump and the engine, and the controller is further specifically configured to: Obtain the engine oil pressure in the oil pipe between the oil pump and the engine through the second sensor; If the engine oil pressure is less than the pressure limit value and the duration of the engine oil pressure being less than the pressure limit value is equal to the time limit value when the reversing solenoid valve is in the second state to supply engine oil, then control the reversing solenoid valve to enter the first state to supply engine oil; If the engine oil pressure is less than the pressure limit value and the duration of the engine oil pressure being less than the pressure limit value is equal to the time limit value when the reversing solenoid valve is in the first state to supply engine oil, then issue an engine oil pressure loss alarm signal.

2. The engine oil supply system according to claim 1, wherein A first sensor is provided on the oil pan, and the controller is configured to: Obtain the tilt angle of the oil pan through the first sensor.

3. The engine oil supply system according to claim 1, characterized in that, The controller is specifically configured to: If the tilt angle is less than the tilt angle limit value, then control the reversing solenoid valve to enter the first state to supply engine oil; If the tilt angle is greater than or equal to the tilt angle limit value, then control the reversing solenoid valve to enter the second state to supply engine oil.

4. The engine oil supply system according to claim 1, characterized in that, The controller is specifically configured to: Within a preset time period, if the obtained tilt angle of the oil pan continuously is less than the tilt angle limit value, then control the reversing solenoid valve to enter the first state to supply engine oil; Within a preset time period, if the obtained tilt angle of the oil pan continuously is greater than or equal to the tilt angle limit value, then control the reversing solenoid valve to enter the second state to supply engine oil; Otherwise, control the reversing solenoid valve to maintain the original state to supply engine oil.

5. The engine oil supply system according to claim 1, characterized in that, The controller is specifically configured to: Obtain the operating state of the reversing solenoid valve; If the operating state of the reversing solenoid valve is normal, then obtain the tilt angle; If the operating state of the reversing solenoid valve is abnormal, then control the reversing solenoid valve to maintain the first state to supply engine oil until the operating state of the reversing solenoid valve is normal, and then obtain the tilt angle.

6. The engine oil supply system according to claim 1, characterized in that A first oil storage cavity is provided at the front end of the oil pan, and a second oil storage cavity is provided at the rear end. Both the first oil storage cavity and the second oil storage cavity are grooves provided at the bottom of the oil pan. The main oil suction pipe sucks the engine oil in the first oil storage cavity, and the auxiliary oil suction pipe sucks the engine oil in the second oil storage cavity.

7. The engine oil supply system according to claim 6, wherein, The cross-sectional dimension of the first oil storage cavity is larger than that of the second oil storage cavity.

8. The engine oil supply system according to claim 1, wherein, Check valves are provided between the main oil suction pipe and the reversing solenoid valve, and between the auxiliary oil suction pipe and the reversing solenoid valve.

9. A vehicle, characterized in that, It includes an engine, and the engine oil supply system according to any one of claims 1-8. The engine oil supply system is used to supply engine oil to the engine.

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