CN111319622A

CN111319622A - Control method and system for preventing bearing bush failure of balance shaft

Info

Publication number: CN111319622A
Application number: CN202010099342.9A
Authority: CN
Inventors: 王磊
Original assignee: Zhejiang Yili Auto Parts Co ltd; Zhejiang Geely Holding Group Co Ltd
Current assignee: Zhejiang Yili Auto Parts Co ltd; Zhejiang Geely Holding Group Co Ltd
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2020-06-23
Anticipated expiration: 2040-02-18
Also published as: CN111319622B

Abstract

The invention discloses a control method and a control system for preventing a bearing bush of a balance shaft from failing, wherein the balance shaft comprises a shell and the bearing bush, the shell is provided with a first sensor and a second sensor, and the method comprises the following steps: when the vehicle is in a preset working condition, acquiring a first temperature and a second temperature; and calculating a difference value; comparing the difference value with a preset range; when the difference value is within a preset range, comparing the first temperature with a first preset temperature; when the first temperature is not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a first preset speed; when the first temperature and/or the second temperature is/are not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a second preset speed; according to the invention, the first sensor and the second sensor are added to monitor the temperature of the balance shaft bearing bush in real time, when the temperature is abnormal, the vehicle is controlled to decelerate, the balance shaft bearing bush is prevented from losing efficacy, the operation is ensured before the balance shaft bearing bush is lost efficacy, and the power loss of the vehicle caused by the bearing bush losing efficacy is avoided.

Description

Control method and system for preventing bearing bush failure of balance shaft

Technical Field

The invention relates to the technical field of automobiles, in particular to a control method and a control system for preventing a bearing bush of a balance shaft from losing efficacy.

Background

Along with the improvement of living standard, the automobile has larger and larger holding amount, people pay more and more attention to the comfort performance of the automobile, and the engine is used as a power element of the automobile and plays an important role in the comfort performance of the automobile.

Engines in the prior art are generally equipped with a balancer system, which is effective in improving engine stability, and usually reduces engine start-up and idling vibration. However, for a small-displacement three-cylinder engine, due to the limitation of volume and arrangement boundary, the oil pump assembly is often directly driven by the balancer system, and if the balancer system fails, the oil pump loses driving torque, so that the high-pressure oil passage is starved, and further parts such as a crank bush, a connecting rod bush, a camshaft, a supercharger and the like which need high-pressure oil lubrication are locked and failed due to starvation. The balancer system balance shaft bearing block high-temperature locking is the most common failure mode of the balancer, and if the balance shaft bearing block locking can be identified in advance and the balancer system is stopped and overhauled in time, the phenomenon that an oil pump does not work due to the fact that the balancer system fails and large maintenance cost is caused can be avoided. In the prior art, the early warning is only made on the failure of the bearing bush, and the operation is not made in time according to the early warning, so that the failure of the bearing bush is avoided.

Based on the defects in the prior art, a control method and a control system for preventing the bearing bush of the balance shaft from losing efficacy are urgently needed to solve the problems.

Disclosure of Invention

In order to solve the technical problem, the invention discloses a control method and a control system for preventing a balance shaft bearing bush from failing, wherein a first temperature is obtained through a first sensor, and a second temperature is obtained through a second sensor; calculating a difference value according to the first temperature and the second temperature; comparing the difference value with the preset range to avoid inaccurate measured temperature value after the first sensor and/or the second sensor fails; when the difference value is within the preset range, the first temperature value is compared with the first preset value, when the temperature is abnormal, the vehicle is controlled to decelerate, the balance shaft bearing bush is prevented from losing efficacy, the operation before the balance shaft bearing bush loses efficacy is guaranteed, the vehicle power loss caused by the fact that the balance shaft bearing bush loses efficacy in the driving process of a driver is avoided, and further the personal safety of the driver is protected.

The invention discloses a control method and a control system for preventing a bearing bush of a balance shaft from failing, wherein the method is used for an engine, the engine comprises the balance shaft, the balance shaft comprises a shell and the bearing bush, the bearing bush is arranged in the shell, a first sensor and a second sensor are arranged on the shell, the first sensor and the second sensor are both used for acquiring the temperature of the bearing bush, and the method comprises the following steps:

when the vehicle is in a preset working condition, acquiring a first temperature through a first sensor and acquiring a second temperature through a second sensor;

calculating a difference value according to the first temperature and the second temperature;

comparing the difference value with a preset range;

when the difference value is within the preset range, comparing the first temperature with a first preset temperature; when the first temperature is not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a first preset speed;

when the difference value is not within the preset range, comparing a first temperature and a second temperature with the first preset temperature respectively; and when the first temperature and/or the second temperature is/are not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a second preset speed.

Further, when the vehicle is in the preset operating condition, before obtaining the first temperature through the first sensor and obtaining the second temperature through the second sensor, the method further includes:

acquiring the vehicle speed, the opening degree of an accelerator pedal and the opening degree of a brake pedal;

and judging whether the vehicle is in a preset working condition or not according to the vehicle speed, the opening degree of the accelerator pedal and the opening degree of the brake pedal, wherein the preset working condition is a non-creeping working condition.

Further, the step of judging whether the vehicle is in a preset working condition or not according to the vehicle speed, the opening degree of the accelerator pedal and the opening degree of the brake pedal comprises the following steps:

judging whether the vehicle speed, the opening degree of the accelerator pedal and the opening degree of the brake pedal meet preset conditions or not, wherein the preset conditions are that the vehicle speed is not less than a preset vehicle speed, the opening degree of the accelerator pedal is not less than a first preset value and the opening degree of the brake pedal is not less than a second preset value;

if the vehicle speed, the opening degree of the accelerator pedal and the opening degree of the brake pedal accord with the preset conditions, judging that the vehicle is in a preset working condition;

and if the vehicle speed, the opening degree of the accelerator pedal and the opening degree of the brake pedal do not accord with the preset conditions, judging that the vehicle is in a non-preset working condition.

Further, after comparing the first temperature with a first preset temperature, the method further includes:

generating a first prompt message and a second prompt message according to the first temperature;

when the first temperature is not lower than the first preset temperature, generating first prompt information, wherein the first prompt information is used for prompting that the bearing bush has a failure risk;

and when the first temperature is lower than the first preset temperature, generating second prompt information, wherein the second prompt information is used for prompting that the bearing bush has no failure risk.

Further, the comparing the first temperature with a first preset temperature when the difference is within the preset range comprises;

when the difference value is within a preset range, comparing the first temperature with a second preset temperature;

when the first temperature is not less than the second preset temperature, controlling the speed of the vehicle to be reduced to a first preset speed within a preset time period;

when the first temperature is lower than the second preset temperature, comparing the first temperature with the first preset temperature;

wherein the second preset temperature is greater than the first preset temperature.

Further, the controlling the vehicle speed of the vehicle to be reduced to a first preset speed within a preset time period comprises:

acquiring the vehicle speed;

calculating the deceleration of the vehicle according to the vehicle speed and a preset time length;

controlling the vehicle to decelerate to a first preset speed based on the deceleration.

Further, when the difference is not within the preset range, comparing the first temperature and the second temperature with the first preset temperature respectively includes:

when the difference value is not within the preset range, judging that the first sensor and/or the second sensor is failed;

comparing the first temperature and the second temperature with the first preset temperature respectively;

and when the first temperature and the second temperature are both smaller than the first preset temperature, generating third prompt information, wherein the third prompt information is used for prompting a driver to check the first sensor and the second sensor.

The invention also provides a control system for preventing the bearing shell failure of the balance shaft, which is used for realizing the control method for preventing the bearing shell failure of the balance shaft, wherein the system is used for an engine, the engine comprises the balance shaft, the balance shaft comprises a shell and the bearing shell, the bearing shell is arranged in the shell, a first sensor and a second sensor are arranged on the shell, and the first sensor and the second sensor are used for acquiring the temperature of the bearing shell; the system comprises a controller and a detection device, wherein the detection device is electrically connected with the controller;

the detection device comprises the first sensor and the second sensor, and the first sensor and the second sensor are used for acquiring the temperature of the bearing bush and sending the temperature of the bearing bush to the controller;

the controller is configured to: when the vehicle is in a preset working condition, receiving a first temperature sent by the first sensor and a second temperature sent by the second sensor; calculating a difference value according to the first temperature and the second temperature; comparing the difference value with a preset range; when the difference value is within the preset range, comparing the first temperature with a first preset temperature; when the first temperature is not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a first preset speed; when the difference value is not within the preset range, comparing a first temperature and a second temperature with the first preset temperature respectively; and when the first temperature and/or the second temperature is/are not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a second preset speed.

Further, the alarm is electrically connected with the controller;

the alarm is used for: when the first temperature is not less than the first preset temperature, displaying first prompt information;

when the first temperature is lower than the first preset temperature, displaying second prompt information;

and when the first temperature and the second temperature are both lower than the first preset temperature, displaying third prompt information, wherein the first prompt information is used for prompting that the bearing bush has a failure risk, the second prompt information is used for prompting that the bearing bush does not have the failure risk, and the third prompt information is used for prompting a driver to check the first sensor and the second sensor.

Further, the detection device further comprises: the vehicle speed sensor, the accelerator pedal sensor and the brake pedal sensor are all electrically connected with the controller;

the vehicle speed sensor is arranged on a chassis of the vehicle and used for acquiring the vehicle speed;

the accelerator pedal sensor is arranged on an accelerator pedal of the vehicle and used for acquiring the opening degree of the accelerator pedal;

the brake pedal sensor is arranged on a brake pedal of the vehicle and used for acquiring the opening degree of the brake pedal.

The embodiment of the invention has the following beneficial effects:

the invention obtains a first temperature through a first sensor and obtains a second temperature through a second sensor; calculating a difference value according to the first temperature and the second temperature; comparing the difference value with the preset range to avoid inaccurate measured temperature value after the first sensor and/or the second sensor fails; when the difference value is within the preset range, the first temperature value is compared with the first preset value, when the temperature is abnormal, the vehicle is controlled to decelerate, the balance shaft bearing bush is prevented from losing efficacy, the operation before the balance shaft bearing bush loses efficacy is guaranteed, the vehicle power loss caused by the fact that the balance shaft bearing bush loses efficacy in the driving process of a driver is avoided, and further the personal safety of the driver is protected.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a flowchart of a control method for preventing a bearing shell of a balance shaft from failing according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a control system for preventing a bearing shell of a balance shaft from failing according to an embodiment of the present invention.

Wherein the reference numerals in the figures correspond to:

1-a controller; 2-a detection device; 3-warning indicator.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The current balance shaft bearing shell has the following disadvantages: the balancer system balance shaft bearing bush high-temperature locking is the most common failure mode of the balancer, if the balance shaft bearing bush locking can be identified in advance, the balancer system can be stopped and overhauled in time, the phenomenon that an oil pump does not work and large maintenance cost is caused due to failure of the balancer system can be avoided, and the prior art only gives an early warning to the shaft bush failure and does not give timely operation according to the early warning to avoid the bearing bush failure.

The invention provides a control method and a control system for preventing a balance shaft bearing bush from failing, aiming at the defects of the prior art, the invention monitors the temperature of the balance shaft bearing bush in real time by adding a first sensor and a second sensor, controls the vehicle to decelerate when the temperature is abnormal, avoids the balance shaft bearing bush from failing, ensures the operation before the balance shaft bearing bush fails, avoids the vehicle power loss caused by the balance shaft bearing bush failure in the driving process of a driver, and further protects the personal safety of the driver.

Referring to fig. 1-2, the present embodiment provides a control method and a system for preventing a bearing shell failure of a balance shaft, the method is used for an engine, the engine comprises a balance shaft, the balance shaft comprises a housing and a bearing shell, the bearing shell is arranged in the housing, a first sensor and a second sensor are arranged on the housing, the first sensor and the second sensor are both used for acquiring the temperature of the bearing shell, and the method comprises the following steps:

s1: when the vehicle is in a preset working condition, acquiring a first temperature through a first sensor and acquiring a second temperature through a second sensor;

s2: calculating a difference value according to the first temperature and the second temperature;

s3: comparing the difference value with a preset range;

s4: when the difference value is within the preset range, comparing the first temperature with a first preset temperature; when the first temperature is not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a first preset speed;

s5: when the difference value is not within the preset range, comparing a first temperature and a second temperature with the first preset temperature respectively; and when the first temperature and/or the second temperature is/are not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a second preset speed.

Specifically, the first temperature sensor and the second temperature sensor are both temperature sensors.

It should be noted that: the bearing bush failure detection method comprises the steps that the possibility that failure can occur in a temperature sensor, the temperature sensor installation and a temperature feedback system of the temperature sensor is considered, so that the bearing bush failure detection method is provided with two temperature sensors, wherein one temperature sensor is a first sensor and a second sensor, a temperature value obtained by the first sensor is a main sensor, the second sensor is an auxiliary sensor, the first temperature obtained by the main sensor is compared with the second temperature obtained by the auxiliary sensor, when the difference value of the first temperature and the second temperature is within a preset range, the main sensor and the auxiliary sensor are judged not to fail, and at the moment, the temperature value obtained by the main sensor is used for judging whether the risk of failure exists in the bearing bush; when the difference value is not within the preset range, judging that the main sensor and/or the auxiliary sensor are in a failure state, wherein the temperature values of the bearing bush, which are acquired by the main sensor and the auxiliary sensor, are inaccurate, and judging whether the bearing bush has a risk of failure or not according to the temperature value acquired by the main sensor and the temperature value acquired by the auxiliary sensor; calculating a difference value according to the first temperature and the second temperature; comparing the difference value with the preset range to avoid inaccurate measured temperature value after the first sensor and/or the second sensor fails; when the difference value is within the preset range, the first temperature value is compared with the first preset value, when the temperature is abnormal, the vehicle is controlled to decelerate, the balance shaft bearing bush is prevented from losing efficacy, the operation before the balance shaft bearing bush loses efficacy is guaranteed, the vehicle power loss caused by the fact that the balance shaft bearing bush loses efficacy in the driving process of a driver is avoided, and further the personal safety of the driver is protected.

Preferably, when the vehicle is in the preset operating condition, before acquiring the first temperature by the first sensor and acquiring the second temperature by the second sensor, the method further comprises:

Specifically, after the bearing bush fails, the vehicle speed is generally reduced, the engine is controlled to stop moving, and if the vehicle is in a creeping state, the control method for preventing the bearing bush failure of the balance shaft can only judge whether the bearing bush has a failure risk, and cannot prevent the bearing bush from failing.

Preferably, the determining whether the vehicle is in a preset working condition according to the vehicle speed, the opening degree of the accelerator pedal and the opening degree of the brake pedal includes:

Specifically, when the vehicle meets the above conditions, the vehicle is in a non-creeping working condition, and the control method for preventing the bearing bush of the balance shaft from failing can judge whether the bearing bush has a failure risk or not and prevent the bearing bush from failing.

Preferably, the comparing the first temperature with a first preset temperature further comprises:

Specifically, after comparing the difference value with a preset range, the method further includes:

setting a first preset temperature;

the setting of the first preset temperature includes: sampling the temperature of the bearing bush when the engine normally runs to obtain the sampling data of the temperature of the bearing bush;

determining the temperature range of the bearing bush during normal work according to the sampling data;

and setting the maximum temperature allowed when the bearing bush normally operates as the first preset temperature.

Preferably, said comparing said first temperature with a first preset temperature when said difference is within said preset range comprises;

Specifically, the value of the second preset temperature is generally twice the value of the first preset temperature, and when the difference is within the preset range, the relationship between the first temperature and the second preset temperature is determined first, and then the relationship between the first temperature and the first preset temperature is determined.

Specifically, when the first temperature is not less than the second preset temperature, fourth prompt information is generated, where the fourth prompt information is used to prompt a driver that the risk of the bearing bush failure is extremely high, at this time, the vehicle speed must be reduced to a first preset speed within a preset time, and the first preset speed is generally set to zero; and when the first temperature is less than the second preset temperature and not less than the first preset temperature, generating first prompt information.

Preferably, the controlling the vehicle speed of the vehicle to fall to a first preset speed within a preset time period comprises:

acquiring the vehicle speed;

Preferably, when the difference is not within the preset range, comparing the first temperature and the second temperature with the first preset temperature respectively comprises:

Specifically, when it is determined that the first sensor and/or the second sensor is/are failed, the first temperature and the second temperature are obtained and compared with the first preset temperature respectively;

when the first temperature is lower than the first preset temperature and the second temperature is not lower than the first preset temperature, controlling the speed of the vehicle to be reduced to a second preset speed;

when the second temperature is lower than the first preset temperature and the first temperature is not lower than the first preset temperature, controlling the speed of the vehicle to be reduced to a second preset speed;

when the first temperature is not less than the first preset temperature and the second temperature is not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a second preset speed;

specifically, the second preset speed may be equal to the first preset speed, or the second preset speed is greater than the first preset speed.

The invention also provides a control system for preventing the bearing shell failure of the balance shaft, which is used for realizing the control method for preventing the bearing shell failure of the balance shaft, wherein the system is used for an engine, the engine comprises the balance shaft, the balance shaft comprises a shell and the bearing shell, the bearing shell is arranged in the shell, a first sensor and a second sensor are arranged on the shell, and the first sensor and the second sensor are used for acquiring the temperature of the bearing shell; the system comprises a controller 1 and a detection device 2, wherein the detection device 2 is electrically connected with the controller 1;

the detection device 2 comprises the first sensor and the second sensor, and the first sensor and the second sensor are both used for acquiring the temperature of the bearing bush and sending the temperature of the bearing bush to the controller 1;

specifically, the first sensor and the second sensor are both temperature sensors;

in other embodiments, a bearing is disposed on the housing, a sensor mounting hole with a diameter of 3mm is formed in the bearing, the first sensor is disposed in the sensor mounting hole, the first sensor contacts with a bottom surface of the mounting hole, and the second sensor is disposed on the bearing bush.

The controller 1 is configured to: when the vehicle is in a preset working condition, receiving a first temperature sent by the first sensor and a second temperature sent by the second sensor; calculating a difference value according to the first temperature and the second temperature; comparing the difference value with a preset range; when the difference value is within the preset range, comparing the first temperature with a first preset temperature; when the first temperature is not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a first preset speed; when the difference value is not within the preset range, comparing a first temperature and a second temperature with the first preset temperature respectively; and when the first temperature and/or the second temperature is/are not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a second preset speed.

Preferably, the device further comprises an alarm 3, wherein the alarm 3 is electrically connected with the controller 1;

the alarm 3 is used for: when the first temperature is not less than the first preset temperature, displaying first prompt information;

Specifically, the display device is electrically connected with the controller 1, and the display device is used for displaying the first prompt message, the second prompt message and the third prompt message.

Preferably, the detection device 2 further comprises: the system comprises a vehicle speed sensor, an accelerator pedal sensor and a brake pedal sensor, wherein the vehicle speed sensor, the accelerator pedal sensor and the brake pedal sensor are all electrically connected with a controller 1;

The working process of the control system for preventing the bearing bush failure of the balance shaft is as follows: when the vehicle is in a preset working condition, receiving a first temperature sent by the first sensor and a second temperature sent by the second sensor; calculating a difference value according to the first temperature and the second temperature; comparing the difference value with a preset range; when the difference value is within the preset range, comparing the first temperature with a first preset temperature; when the first temperature is not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a first preset speed; when the difference value is not within the preset range, comparing a first temperature and a second temperature with the first preset temperature respectively; when the first temperature and/or the second temperature is/are not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a second preset speed; the vehicle with the control system for preventing the bearing shell failure of the balance shaft can acquire a first temperature through the first sensor and acquire a second temperature through the second sensor; calculating a difference value according to the first temperature and the second temperature; comparing the difference value with the preset range to avoid inaccurate measured temperature value after the first sensor and/or the second sensor fails; when the difference value is within the preset range, the first temperature value is compared with the first preset value, when the temperature is abnormal, the vehicle is controlled to decelerate, the balance shaft bearing bush is prevented from losing efficacy, the operation before the balance shaft bearing bush loses efficacy is guaranteed, the vehicle power loss caused by the fact that the balance shaft bearing bush loses efficacy in the driving process of a driver is avoided, and further the personal safety of the driver is protected.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A control method for preventing failure of a bearing shell of a balance shaft, wherein the method is applied to an engine, the engine comprises the balance shaft, the balance shaft comprises a shell and the bearing shell, the bearing shell is arranged in the shell, a first sensor and a second sensor are arranged on the shell, the first sensor and the second sensor are both used for acquiring the temperature of the bearing shell, and the method comprises the following steps:

comparing the difference value with a preset range;

2. The control method for preventing the bearing shell of the balance shaft from failing according to claim 1, wherein before the obtaining the first temperature by the first sensor and the second temperature by the second sensor when the vehicle is in the preset working condition, the method further comprises:

3. The control method for preventing the bearing shell of the balance shaft from failing according to claim 2, wherein the judging whether the vehicle is in a preset working condition or not according to the vehicle speed, the opening degree of the accelerator pedal and the opening degree of the brake pedal comprises the following steps:

4. The control method for preventing the bearing shell of the balance shaft from failing according to claim 3, wherein the comparing the first temperature with a first preset temperature further comprises:

5. The control method for preventing bearing shell failure of a balance shaft as recited in claim 4, wherein when the difference is within the preset range, the comparing the first temperature with a first preset temperature comprises;

6. The control method for preventing bearing shell failure of a balance shaft as recited in claim 5, wherein the controlling the vehicle speed of the vehicle to be reduced to a first preset speed within a preset time period comprises:

acquiring the vehicle speed;

7. The control method for preventing bearing shell failure of a balance shaft according to claim 6, wherein when the difference is not within the preset range, the comparing the first temperature and the second temperature with the first preset temperature respectively comprises:

8. A control system for preventing bearing shell failure of a balance shaft, which is used for realizing the control method for preventing bearing shell failure of the balance shaft according to any one of claims 1 to 7, and is characterized in that the system is used for an engine, the engine comprises a balance shaft, the balance shaft comprises a shell and a bearing shell, the bearing shell is arranged in the shell, a first sensor and a second sensor are arranged on the shell, and the first sensor and the second sensor are used for acquiring the temperature of the bearing shell; the system comprises a controller (1) and a detection device (2), wherein the detection device (2) is electrically connected with the controller (1);

the detection device (2) comprises the first sensor and the second sensor, and the first sensor and the second sensor are used for acquiring the temperature of the bearing bush and sending the temperature of the bearing bush to the controller (1);

the controller (1) is configured to: when the vehicle is in a preset working condition, receiving a first temperature sent by the first sensor and a second temperature sent by the second sensor; calculating a difference value according to the first temperature and the second temperature; comparing the difference value with a preset range; when the difference value is within the preset range, comparing the first temperature with a first preset temperature; when the first temperature is not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a first preset speed; when the difference value is not within the preset range, comparing a first temperature and a second temperature with the first preset temperature respectively; and when the first temperature and/or the second temperature is/are not less than the first preset temperature, controlling the speed of the vehicle to be reduced to a second preset speed.

9. The control system for preventing the bearing shell failure of the balance shaft as recited in claim 8, further comprising an alarm (3), wherein the alarm (3) is electrically connected with the controller (1);

the alarm (3) is used for: when the first temperature is not less than the first preset temperature, displaying first prompt information;

10. A control system for preventing bearing shell failure in balance shafts according to claim 9, characterized in that the detection means (2) further comprises: the vehicle speed sensor, the accelerator pedal sensor and the brake pedal sensor are all electrically connected with the controller (1);