CN-122014838-A - Lubrication system and control method thereof

CN122014838ACN 122014838 ACN122014838 ACN 122014838ACN-122014838-A

Abstract

The invention provides a lubricating system and a control method thereof, wherein the system comprises an oil pan, an oil filter, an electronic pump module, a lubricating pipeline and a lubricating point, wherein lubricating oil is filled in the oil pan, the oil filter is arranged in the oil pan, an inlet of the oil filter is communicated with the interior of the oil pan, an outlet of the oil filter is communicated with an inlet of the electronic pump module, an outlet of the electronic pump module is communicated with the lubricating pipeline and the lubricating point, and the lubricated lubricating oil can flow back into the oil pan again.

Inventors

WANG LIN
WANG HE
FANG WEI
HUANG YUGANG

Assignees

凯博易控车辆科技(苏州)股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260303

Claims (10)

1. A lubrication system, the system comprising: The oil pan is internally filled with lubricating oil; The oil filter is arranged in the oil pan, and an inlet of the oil filter is communicated with the inside of the oil pan; The outlet of the engine oil filter is communicated with the inlet of the electronic pump module; the outlet of the electronic pump module is communicated with the lubrication pipeline and the lubrication point, and the lubricated lubricating oil can flow back into the oil pan again; the method is characterized in that: the electronic pump module includes: The outlet of the electronic pump is connected with the lubrication pipeline and the lubrication point in a selectable mode through the first check valve or the third check valve; The electronic pump is capable of operating in a clockwise rotation mode and a counter-clockwise rotation mode; The first check valve, the second check valve, the third check valve and the fourth check valve can control the on-off of the corresponding oil paths through the on-off of the first check valve, the second check valve, the third check valve and the fourth check valve; The system can realize the switching of the lubrication system among different working modes through the switching of the rotation mode of the electronic pump and the on-off control of the first check valve, the second check valve, the third check valve and the fourth check valve according to the current running working condition of the vehicle.
2. The lubrication system according to claim 1, wherein the electronic pump is controlled to be in a clockwise rotation mode and the first check valve and the fourth check valve are controlled to be in a disconnected state, and the second check valve and the third check valve are controlled to be in a connected state when the vehicle is in a forward working condition, and the oil passage is an oil pan, an oil filter, the second check valve, the electronic pump, the third check valve, the lubrication pipeline and a lubrication point.
3. The lubrication system according to claim 1, wherein the electronic pump is controlled to be in a counterclockwise rotation mode and the first check valve and the fourth check valve are controlled to be in a connected state and the second check valve and the third check valve are controlled to be in a disconnected state when the vehicle is in a reverse running state, and the oil passage is an oil pan, an oil filter, the fourth check valve, the electronic pump, the first check valve, the lubrication pipeline and a lubrication point.
4. A lubrication system, the system comprising: The oil pan is internally filled with lubricating oil; The oil filter is arranged in the oil pan, and an inlet of the oil filter is communicated with the inside of the oil pan; the outlet of the engine oil filter is communicated with the inlet of the double-electronic-pump module; The outlet of the double-electronic-pump module is communicated with the lubrication pipeline and the lubrication point, and the lubricated lubricating oil can flow back into the oil pan again; the method is characterized in that: The dual electronic pump module includes: The outlet of the oil filter is connected with the first electronic pump in a selectable mode through a second one-way valve or a fourth one-way valve; The outlet of the first electronic pump is connected with the second electronic pump in a selectable manner through a first one-way valve or a third one-way valve; The first electronic pump and the second electronic pump can work in a clockwise rotation mode and a counterclockwise rotation mode; The first check valve, the second check valve, the third check valve and the fourth check valve can control the on-off of the corresponding oil paths through the on-off of the first check valve, the second check valve, the third check valve and the fourth check valve; The system also comprises an oil temperature sensor connected with the oil way, a pressure sensor and a rotating speed sensor connected with each electronic pump, and a fault detection module is respectively connected with the pressure sensor and the rotating speed sensor in a signal manner, and the comparison relation between the real-time oil temperature detected by the oil temperature sensor and a preset threshold value and the detection result of the fault detection module can be switched through the rotation modes of the first electronic pump and the second electronic pump and the on-off control of the first check valve, the second check valve, the third check valve and the fourth check valve, so that the lubrication system can be switched among different working modes.
5. A lubrication system according to claim 4, wherein the system is operable in at least a normal temperature parallel mode, a low temperature series mode, and a fault limp-home mode.
6. A lubrication system according to claim 5, wherein: when the relation between the real-time oil temperature detected by the oil temperature sensor and the preset threshold value meets the following conditions: when the real-time oil temperature is more than or equal to a preset threshold value, the control system enters a normal-temperature parallel mode; When the real-time oil temperature is less than a preset threshold value, the control system enters a low-temperature serial mode, and is switched to a parallel mode when the oil temperature rises to the preset threshold value; when the pressure sensor detects that the pressure of the corresponding electronic pump is abnormal or the rotating speed sensor detects that the rotating speed of the corresponding electronic pump is abnormal, the fault detection module confirms that the corresponding electronic pump is faulty, and the control system enters a fault limp-home mode.
7. The lubrication system according to claim 6, wherein when the system is operated in the normal temperature parallel mode, the first electronic pump and the second electronic pump are controlled to operate in the clockwise rotation mode, the first check valve, the second check valve and the third check valve are controlled to be in the on state, and the fourth check valve is controlled to be in the off state, and the oil path is oil pan, oil filter, second check valve, second electronic pump, third check valve, lubrication pipeline and lubrication point, and oil pan, oil filter, second check valve, first electronic pump, lubrication pipeline and lubrication point.
8. The lubrication system according to claim 6, wherein when the system is operated in the low-temperature series mode, the first electronic pump is controlled to operate in a clockwise rotation mode, the second electronic pump is controlled to operate in a counterclockwise rotation mode, the first check valve and the fourth check valve are controlled to be in a connected state, and the second check valve and the third check valve are in a disconnected state, and an oil path is an oil pan, an oil filter, the fourth check valve, the second electronic pump, the first check valve, the first electronic pump, a lubrication pipeline and a lubrication point.
9. A lubrication system according to claim 6, wherein when the system is operating in a limp-home mode, When the first electronic pump fails, the first electronic pump is controlled to stop, the second electronic pump works in a clockwise rotation mode, the first one-way valve and the fourth one-way valve are controlled to be in a disconnected state, and the second one-way valve and the third one-way valve are in a communicated state; When the second electronic pump fails, the second electronic pump is controlled to stop, the first electronic pump works in a clockwise rotation mode, the third one-way valve and the fourth one-way valve are controlled to be in a disconnected state, the first one-way valve and the second one-way valve are in a connected state, and an oil way is an oil pan, an oil filter, a second one-way valve, a first one-way valve, the first electronic pump, a lubrication pipeline and a lubrication point.
10. A control method of a lubrication system according to any one of claims 6 to 9, comprising the steps of: s100, confirming a system working mode according to a detection result: when the relation between the real-time oil temperature detected by the oil temperature sensor and the preset threshold value meets the following conditions: when the real-time oil temperature is more than or equal to a preset threshold value, the control system enters a normal-temperature parallel mode; When the real-time oil temperature is less than a preset threshold value, the control system enters a low-temperature serial mode, and is switched to a parallel mode when the oil temperature rises to the preset threshold value; When the pressure sensor detects that the pressure of the corresponding electronic pump is abnormal or the rotating speed sensor detects that the rotating speed of the corresponding electronic pump is abnormal, the fault detection module confirms that the corresponding electronic pump has a fault, and the control system enters a fault limp-home mode; And S200, correspondingly controlling the electronic pump and the one-way valve in a corresponding working mode: When the system works in a normal temperature parallel mode, the first electronic pump and the second electronic pump are controlled to work in a clockwise rotation mode, the first one-way valve, the second one-way valve and the third one-way valve are controlled to be in a connected state, and the fourth one-way valve is controlled to be in a disconnected state; When the system works in a low-temperature serial connection mode, the first electronic pump is controlled to work in a clockwise rotation mode, the second electronic pump is controlled to work in a counterclockwise rotation mode, the first one-way valve and the fourth one-way valve are controlled to be in a connected state, and the second one-way valve and the third one-way valve are controlled to be in a disconnected state; when the system is operating in a fault limp-home mode, When the first electronic pump fails, the first electronic pump is controlled to stop, the second electronic pump works in a clockwise rotation mode, the first one-way valve and the fourth one-way valve are controlled to be in a disconnected state, and the second one-way valve and the third one-way valve are in a communicated state; When the second electronic pump fails, the second electronic pump is controlled to stop, the first electronic pump works in a clockwise rotation mode, the third one-way valve and the fourth one-way valve are controlled to be in a disconnected state, the first one-way valve and the second one-way valve are in a connected state, and an oil way is an oil pan, an oil filter, a second one-way valve, a first one-way valve, the first electronic pump, a lubrication pipeline and a lubrication point.

Description

Lubrication system and control method thereof Technical Field The invention relates to the technical field of active lubrication systems of a gearbox electronic pump of a new energy commercial vehicle, in particular to a lubrication system and a control method thereof. Background The input rotating speed of the new energy commercial vehicle gearbox is generally higher than that of the traditional gearbox, and when the rotating speed of a motor is higher than 5000rpm, an active lubrication system is required to be additionally arranged to ensure the reliable operation of parts such as gears, bearings and the like. Currently, a commercial vehicle gearbox adopts high-viscosity lubricating oil due to large transmission torque and power, and an active lubrication system usually adopts a mechanical pump to realize an active lubrication function. The active lubrication mode in the prior art has the following defects: 1) The efficiency is low, namely, the flow and the rotating speed of the mechanical pump are related to the viscosity of the lubricating oil, and under the normal working condition, the flow is larger, so that extra power loss is caused, and the system efficiency is reduced; 2) The reliability is insufficient, the normal running and reversing working conditions of the vehicle are considered, the mechanical pump is required to have a bidirectional oil supply function, and the structural design leads to the reduction of the reliability of the system; 3) The flexibility is poor, although reliable lubrication can be provided in a low-temperature environment, the flow and pressure requirements of different working conditions cannot be adapted, and the low-temperature cold start and normal-temperature efficient lubrication working conditions are difficult to consider; 4) If the electronic pump is adopted, the problem of bidirectional oil supply can be avoided, the system efficiency is improved, but the low-temperature cold start is difficult, the viscosity of lubricating oil at low temperature is high, and the single electronic pump can not provide enough oil pressure to realize pre-lubrication, so that the application of the electronic pump in a gearbox of a commercial vehicle is restricted; 5) The space-limited cost of the small new energy commercial vehicle gearbox is sensitive, and the multi-electronic-pump design cannot meet the requirements of lubrication, space and cost. Based on this, there is a need to provide a new solution to the above-mentioned drawbacks and deficiencies of the prior art. Disclosure of Invention In order to solve the defects and shortcomings in the prior art, the invention provides a lubrication system and a control method thereof. In order to solve the defects and shortcomings in the prior art, the invention provides the following specific scheme: a lubrication system, the system comprising: The oil pan is internally filled with lubricating oil; The oil filter is arranged in the oil pan, and an inlet of the oil filter is communicated with the inside of the oil pan; The outlet of the engine oil filter is communicated with the inlet of the electronic pump module; the outlet of the electronic pump module is communicated with the lubrication pipeline and the lubrication point, and the lubricated lubricating oil can flow back into the oil pan again; the method is characterized in that: the electronic pump module includes: The outlet of the electronic pump is connected with the lubrication pipeline and the lubrication point in a selectable mode through the first check valve or the third check valve; The electronic pump is capable of operating in a clockwise rotation mode and a counter-clockwise rotation mode; The first check valve, the second check valve, the third check valve and the fourth check valve can control the on-off of the corresponding oil paths through the on-off of the first check valve, the second check valve, the third check valve and the fourth check valve; The system can realize the switching of the lubrication system among different working modes through the switching of the rotation mode of the electronic pump and the on-off control of the first check valve, the second check valve, the third check valve and the fourth check valve according to the current running working condition of the vehicle. As a further preferable embodiment of the invention, when the vehicle is in a forward working condition, the electronic pump is controlled to be in a clockwise rotation mode, the first one-way valve and the fourth one-way valve are controlled to be in a disconnected state, the second one-way valve and the third one-way valve are in a communicated state, and an oil way is formed by an oil pan, an oil filter, the second one-way valve, the electronic pump, the third one-way valve, a lubrication pipeline and a lubrication point. When the vehicle is in a reversing working condition, the electronic pump is controlled to be in a anticlockwise rotation mode, the first one-way valve