CN113435064B - Silicon oil damper service life prediction method and vehicle - Google Patents

Abstract

The invention relates to the technical field of vehicles, and particularly discloses a silicone oil damper service life prediction method and a vehicle, wherein the silicone oil damper service life prediction method comprises the steps of collecting the real-time temperature of a silicone oil damper, the real-time torque of an engine and the real-time rotating speed of the engine in real time in the running process of the vehicle; acquiring a real-time torsional amplitude value of the silicone oil damper according to the real-time rotating speed; converting the real-time torsional amplitude value into a standard torsional amplitude value of the silicone oil damper at a set temperature and a set torque according to the corresponding relation among the temperature, the torque and the torsional amplitude value; and acquiring the first remaining driving mileage of the silicone oil damper according to the corresponding relation between the driving mileage and the cracking amount of the torsional amplitude value. The real-time torsion amplitude value of the silicone oil damper is converted into the standard torsion amplitude value under the set temperature and the set torque, and the residual driving mileage of the silicone oil damper is evaluated through the standard torsion amplitude value, so that the influence of different real-time working conditions on the torsion amplitude value can be avoided, and the accuracy of an evaluation result is ensured.

Description

A kind of silicone oil shock absorber life prediction method and vehicle

technical field

The invention relates to the technical field of vehicles, in particular to a method for predicting the life of a silicone oil shock absorber and a vehicle.

Background technique

Silicone oil shock absorber is a key component of the vehicle. It is installed on the crankshaft of the engine and is essential to keep the vehicle running safely and stably.

In the prior art, when predicting the remaining life of a silicone oil shock absorber, it is usually necessary to install the silicone oil shock absorber on a test bench, and after loading a certain number of times to make the silicone oil shock absorber fail, count the maximum loading times of the silicone oil shock absorber. However, when the silicone oil shock absorber is installed on the vehicle, the remaining service life of the silicone oil shock absorber cannot be effectively evaluated, and because the silicone oil shock absorber is in actual use, its working conditions are constantly changing, such as Changes in factors such as temperature and system resonance will affect the performance of the silicone oil shock absorber, which will lead to changes in the degree of attenuation of the remaining life of the silicone oil shock absorber, and the test bench usually cannot fully simulate various operating conditions of the vehicle. Forecasting methods are not accurate.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method for predicting the life of a silicone oil shock absorber and a vehicle, so that the remaining mileage of the silicone oil shock absorber can be evaluated on the vehicle, and the evaluation result is accurate.

In one aspect, the present invention provides a method for predicting the life of a silicone oil shock absorber, wherein the silicone oil shock absorber is installed on a crankshaft of an engine of a vehicle, and the method for predicting the life of the silicone oil shock absorber includes:

During the driving process of the vehicle, the real-time temperature of the silicone oil shock absorber, the real-time torque of the engine and the real-time speed of the engine are collected in real time;

Obtain the real-time torsional amplitude value of the silicone oil shock absorber according to the real-time rotational speed;

Converting the real-time torsional amplitude value to the standard torsional amplitude value of the silicone oil shock absorber at a set temperature and a set torque according to the corresponding relationship between temperature, torque and torsional amplitude value;

According to the corresponding relationship between the mileage and the cracking amount of the torsional amplitude value, the first remaining mileage of the silicone oil shock absorber is obtained, and the cracking amount of the torsional amplitude value is any moment in the life range of the silicone oil shock absorber. The difference between the standard torsional amplitude value and the standard torsional amplitude value when the silicone oil shock absorber is used for the first time.

As the preferred technical solution for the life prediction method of the silicone oil shock absorber, the life prediction method of the silicone oil shock absorber also includes:

Obtain the base silicone oil viscosity of the silicone oil shock absorber;

According to the conversion relationship between temperature, frequency and viscosity, the viscosity of the basic silicone oil is converted into the standard silicone oil viscosity of the silicone oil shock absorber at a set temperature and a set frequency;

According to the corresponding relationship between the mileage and the cracking rate of the viscosity of the silicone oil, the second remaining mileage of the silicone oil shock absorber is obtained, and the cracking rate of the viscosity of the silicone oil is the standard silicone oil at any time within the life range of the silicone oil shock absorber. The ratio of the viscosity to the standard silicone oil viscosity when the silicone oil shock absorber is used for the first time;

The minimum value of the first remaining mileage and the second remaining mileage is taken as the remaining life of the silicone oil shock absorber.

As a preferred technical solution for the life prediction method of the silicone oil shock absorber, during the vehicle traveling distance _Sa , the corresponding standard silicone oil viscosity at the beginning is the first standard silicone oil viscosity η ₁ , and the corresponding standard silicone oil viscosity at the end is the second standard silicone oil viscosity η 1 . Standard silicone oil viscosity η ₂ ;

The corresponding relationship between the mileage and the cracking rate of silicone oil viscosity is:

S _n = (n _failure - n _s1 )/V _{n_rate} ;

V _{η_rate} = (η _s1 -η _s0 )/S _a ;

Alternatively, the corresponding relationship between the mileage and the cracking rate of silicone oil viscosity is:

S_η和

均为硅油减振器的剩余行驶里程；η_failure为硅油减振器失效时的硅油粘度裂化率；η_s1为车辆行驶距离S_a的过程中刚结束时的硅油粘度裂化率，η_S0为车辆行驶距离S_a的过程中刚开始时的硅油粘度裂化率，V_{η_rate}为车辆行驶距离S_a的过程中硅油减振器的硅油粘度裂化率的变化率；η₀为硅油减振器首次使用时于设定温度、设定扭矩下的标准硅油粘度；η_n为预设的硅油减振器后失效时于设定温度、设定扭矩下的标准硅油粘度；

为硅油减振器在寿命期间内的硅油粘度裂化率的平均变化率且为常数。in,

S _η and

are the remaining mileage of the silicone oil shock absorber; η _failure is the silicone oil viscosity cracking rate when the silicone oil shock absorber fails; η _s1 is the silicone oil viscosity cracking rate at the end of the vehicle travel distance _Sa , η _S0 is the vehicle The viscosity cracking rate of silicone oil at the beginning of the process of driving distance _{Sa, V η_rate is} the change rate of the silicone oil viscosity cracking rate of the silicone oil shock absorber in the process of the vehicle driving distance Sa _; η ₀ is when the silicone oil shock absorber is used for the first time Standard silicone oil viscosity at set temperature and set torque; η _n is the standard silicone oil viscosity at set temperature and set torque when the preset silicone oil shock absorber fails after failure;

is the average change rate of the silicone oil viscosity cracking rate during the life of the silicone oil shock absorber and is a constant.

As a preferred technical solution for the life prediction method of the silicone oil shock absorber, the silicone oil shock absorber includes a casing and an inertia ring arranged in the casing, and the formula for obtaining the basic silicone oil viscosity of the silicone oil shock absorber is:

Among them, η is the viscosity of the base silicone oil; ζ is the damping ratio; C _tC is the critical damping coefficient; nc is the flow index of the silicone oil; R ₁ is the outer diameter of the inertia ring; R ₂ is the inner diameter of the inertia ring; B is the thickness of the inertia ring ; δ _c is the gap between the shell and the inertia ring; Q is the quality factor of the silicone oil, and is a constant.

As the preferred technical solution for the life prediction method of silicone oil shock absorbers, the conversion relationship between temperature, frequency and viscosity is:

η(t _equil , ω _q )=V(t _equil -t, ω _q )+η;

Among them, t _equil is the set temperature, t is the real-time temperature; ω _q is the set frequency, η(t _equil , ω _q ) is the standard silicone oil viscosity of the silicone oil shock absorber at the set temperature and set frequency; V ( t _equil -t,ω _q ) is the correction amount of the silicone oil viscosity with respect to the difference between the real-time temperature and the set temperature.

As a preferred technical solution of the method for predicting the life of the silicone oil shock absorber, determine the size of the remaining life of the silicone oil shock absorber;

When the remaining life of the silicone oil shock absorber is less _than Z1, the torque of the vehicle is limited to be within the set torque range, and the speed of the vehicle is limited to be within the set speed range;

When the remaining life of the silicone oil shock absorber is greater than or equal to Z ₁ and less than Z ₂ , a prompt for maintenance is issued;

When the remaining life of the silicone oil shock absorber is greater than or equal to Z ₃ , a reminder that the silicone oil shock absorber is normal is issued;

Here, Z ₁ <Z ₂ <Z ₃ .

As the preferred technical solution for the life prediction method of silicone oil shock absorbers,

In the process of the vehicle traveling the distance S _b , the corresponding standard torsional amplitude value at the beginning is the first standard torsional amplitude value T ₁ , and the corresponding standard torsional amplitude value at the just end is the second standard torsional amplitude value T ₂ ;

The corresponding relationship between the mileage and the cracking amount of the torsional amplitude value is:

S _T =(T _failure -T _s1 )/V _{T_rate} ;

V _{T_rate} = (T _s1 -T _s0 )/S _b ;

Alternatively, the corresponding relationship between the mileage and the cracking amount of the torsional amplitude value is:

均为硅油减振器的剩余行驶里程；T_failure为硅油减振器失效时的扭振幅值的裂化量；T_s1为车辆行驶距离S_b的过程中刚结束时的扭振幅值的裂化量，T_S0为车辆行驶距离S_b的过程中刚开始时的扭振幅值的裂化量，V_{T_rate}为车辆行驶距离S_b的过程中硅油减振器的扭振幅值的裂化量的变化率；T₀为预设的硅油减振器首次使用时于设定温度、设定扭矩下的标准扭振幅值；T_n为预设的硅油减振器失效时于设定温度、设定扭矩下的标准扭振幅值；

为硅油减振器的寿命内的扭振幅值的裂化量的平均变化率且为常数。Wherein, T _failure =T _n -T ₀ , T _s1 =T ₂ -T ₀ , T _s0 =T ₁ -T ₀ ; S _T and

are the remaining mileage of the silicone oil shock absorber; T _failure is the cracking amount of the torsional amplitude value when the silicone oil shock absorber fails; T _s1 is the cracking amount of the torsional amplitude value at the end of the process of the vehicle traveling distance S _b , T _S0 is the cracking amount of the torsional amplitude value at the beginning of the process of the vehicle traveling distance S _b , V _{T_rate} is the change rate of the cracking amount of the torsional amplitude value of the silicone oil shock absorber in the process of the vehicle traveling distance S _b ; T ₀ It is the standard torque amplitude value at the set temperature and the set torque when the preset silicone oil shock absorber is used for the first time; T _n is the standard torque value at the set temperature and the set torque when the preset silicone oil shock absorber fails. Amplitude value;

It is the average change rate of the cracking amount of the torsional amplitude value in the life of the silicone oil damper and is a constant.

As a preferred technical solution of the method for predicting the life of a silicone oil shock absorber, the crankshaft is provided with a rotational speed signal plate, and a rotational speed sensor is used to collect the rotation angle of the rotational speed signal plate, and obtain the real-time torsional amplitude value of the silicone oil shock absorber according to the real-time rotational speed. The formula is:

为平均扭转角位移，且为常数；k的取值为0.5的整数倍；θ_k为第k谐次的实时扭振幅值；δ_k为第k谐次的扭振初始相位，且为常数。Among them, t _n is the time; θ(t _n ) is the torsional angular displacement; ω _p is the instantaneous angular velocity; _{t c} is the time for the signal disc to make one revolution; The number of teeth of the passing speed signal disc;

is the average torsional angular displacement and is a constant; k is an integer multiple of 0.5; θ _k is the real-time torsional amplitude value of the k-th harmonic; δ _k is the initial phase of the torsional vibration of the k-th harmonic, and is a constant.

As the preferred technical solution for the life prediction method of the silicone oil shock absorber, the corresponding relationship between temperature, torque and torsional amplitude value is:

T(t _equil , load _full )=U(t _equil -t)+L(load _full -load)+T(t, load);

Among them, t _equil is the set temperature, load _full is the set torque, t is the real-time temperature, load is the real-time torque, and T(t _equil , load _full ) is the standard of the silicone oil shock absorber at the set temperature and set torque Torsion amplitude value; U(t _equil -t) is the correction amount of the torque amplitude value with respect to the difference between the real-time temperature and the set temperature, L(load _full -load) is the difference between the torque amplitude value with respect to the real-time torque and the set torque The correction amount of ; T(t, load)=θ _k .

As a preferred technical solution of the method for predicting the life of a silicone oil shock absorber, after obtaining the real-time torsional amplitude value, it is judged whether the real-time torsional amplitude value is within the range of the first set torsional amplitude value, and when the real-time torsional amplitude value is within or beyond the range of the first set torsional amplitude value In the first set torsional amplitude value range, the real-time torsional amplitude value is converted into the standard torsional amplitude value of the silicone oil shock absorber at the set temperature and the set torque, and when the real-time torsional amplitude value is When the value exceeds the range of the first set torque amplitude value, an alarm prompt is issued.

As a preferred technical solution of the life prediction method for silicone oil shock absorbers, after obtaining the standard torsional amplitude value, it is judged whether the standard torsional amplitude value is within the range of the set standard torsional amplitude value, if the standard torsional amplitude value is within the set torsional amplitude value Within the value range, execute the obtaining of the first remaining mileage of the silicone oil shock absorber.

As the preferred technical solution of the method for predicting the life of the silicone oil shock absorber, it also includes: before the real-time temperature of the silicone oil shock absorber and the real-time torque of the engine are collected in real time during the driving process of the vehicle:

Confirm that the trigger conditions for the life of the silicone oil shock absorber are met.

As the preferred technical solution for the life prediction method of the silicone oil shock absorber, the triggering conditions to confirm the life of the silicone oil shock absorber include:

Obtain the mileage of the vehicle after the last prediction of the life of the silicone oil shock absorber;

Judging and confirming that the mileage is within the set mileage range;

Get the speed of the engine;

Get the real-time torque of the engine;

Get the temperature of the silicone oil shock absorber;

Judging and confirming that the engine speed is within the set speed range, the engine's real-time torque is within the set torque range, and the temperature of the silicone oil shock absorber is within the set temperature range, then it is confirmed that the trigger conditions for the life of the silicone oil shock absorber are met.

This embodiment also provides a vehicle, the vehicle comprising:

engine;

A vehicle controller capable of collecting the real-time torque output by the engine;

a silicone oil shock absorber, arranged on the crankshaft of the engine;

a temperature sensor for collecting the temperature of the silicone oil shock absorber,

a speed signal disc, arranged on the crankshaft of the engine;

a rotational speed sensor, which is used to collect the angle rotated by the rotational speed signal disc;

a controller, connected with the temperature sensor to collect the real-time temperature of the silicone oil shock absorber; connected with the rotational speed sensor to collect the real-time rotational speed of the engine; used to interact with the vehicle controller to obtain all the the real-time torque, and the controller is configured to execute the method for predicting the life of a silicone oil shock absorber described in any one of the above solutions.

The beneficial effects of the present invention are:

The invention provides a method for predicting the life of a silicone oil shock absorber. The method for predicting the life of a silicone oil shock absorber includes: during the driving process of the vehicle, real-time acquisition of the real-time temperature of the silicone oil shock absorber, the real-time torque of the engine and the real-time speed of the engine; The real-time torsional amplitude value of the silicone oil shock absorber is obtained from the rotational speed; according to the corresponding relationship between temperature, torque and torsional amplitude value, the real-time torsional amplitude value is converted into the standard torsional amplitude value of the silicone oil shock absorber at the set temperature and torque; According to the corresponding relationship between the mileage and the cracking amount of the torsional amplitude value, the first remaining mileage of the silicone oil shock absorber is obtained. By converting the real-time torsional amplitude value of the silicone oil shock absorber into the standard torsional amplitude value under the set temperature and the set torque, and using the standard torsional amplitude value to evaluate the remaining mileage of the silicone oil shock absorber, real-time work can be avoided. The influence of different conditions on the torsional amplitude value ensures the accuracy of the evaluation results.

The present invention also provides a vehicle, which includes an engine, a vehicle controller, a silicone oil shock absorber, a temperature sensor, a rotational speed signal plate, a rotational speed sensor and a controller. Among them, the vehicle controller can collect the real-time torque output by the engine through a torque sensor or the like; the controller is used to interact with the vehicle controller to obtain the real-time torque. The silicone oil damper is installed on the crankshaft of the engine. The temperature sensor is used to collect the temperature of the silicone oil shock absorber and send it to the controller; the speed signal disc is set on the crankshaft of the engine and can rotate with the rotation of the crankshaft, and the speed sensor is used to collect the rotation angle of the speed signal disc and send it to the controller The controller is used to execute the above-mentioned method for predicting the life of the silicone oil shock absorber. For this vehicle, the remaining life of the silicone oil shock absorber can be evaluated during the driving process, without the need for a separate test on the test bench.

Description of drawings

1 is a schematic structural diagram of a vehicle in an embodiment of the present invention;

2 is a flowchart 1 of a method for predicting the life of a silicone oil shock absorber in an embodiment of the present invention;

3 is a second flowchart of a method for predicting the life of a silicone oil shock absorber according to an embodiment of the present invention;

4 is a schematic structural diagram of a silicone oil shock absorber in an embodiment of the present invention;

Fig. 5 is the relation diagram of the correction amount of the difference value of the silicone oil viscosity with respect to the real-time temperature and the set temperature in the embodiment of the present invention;

FIG. 6 is a third flowchart of a method for predicting the life of a silicone oil shock absorber according to an embodiment of the present invention.

In the picture:

1. Engine; 2. Vehicle controller; 3. Silicon oil shock absorber; 31. Housing; 32. Inertia ring; 4. Temperature sensor; 5. Speed signal plate; 6. Speed sensor; 7. Controller; 71. Torsional vibration processor; 72. Engine electronic control unit; 8. Display device.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. Wherein, the terms "first position" and "second position" are two different positions, and the first feature being "above", "over" and "above" the second feature includes the first feature being "over" the second feature Directly above and diagonally above, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

Example 1

As shown in FIG. 1 , this embodiment provides a vehicle, which includes an engine 1 , a vehicle controller 2 , a silicone oil shock absorber 3 , a temperature sensor 4 , a rotational speed signal plate 5 , a rotational speed sensor 6 and a controller 7 . The vehicle controller 2 can collect the real-time torque output by the engine 1 through a torque sensor or the like; the controller 7 is used to interact with the vehicle controller 2 to obtain the real-time torque. The silicone oil damper 3 is provided on the crankshaft of the engine 1 . The temperature sensor 4 is used to collect the temperature of the silicone oil shock absorber 3 and send it to the controller 7; the rotational speed signal disc 5 is arranged on the crankshaft of the engine 1 and can rotate with the rotation of the crankshaft, and the rotational speed sensor 6 is used to collect the rotational speed signal disc 5 turns Specifically, the rotational speed signal disc 5 has a plurality of teeth, and when each tooth passes the rotational speed sensor 6, it will cause the rotational speed sensor 6 to switch between a high level and a low level, and control the The controller 7 acquires the rotation angle and real-time rotation speed of the rotation speed signal disc 5 by collecting the times of level switching of the rotation speed sensor 6, and combining the number of teeth of the rotation speed signal disc 5 and the elapsed time.

The controller 7 can also obtain the real-time torsional amplitude value of the silicone oil shock absorber 3 according to the real-time rotational speed, and convert the real-time torsional amplitude value into the silicone oil shock absorber 3 at the set temperature and setting according to the corresponding relationship between temperature, torque and torsional amplitude value. The standard torsional amplitude value under a constant torque; according to the corresponding relationship between the mileage and the cracking amount of the torsional amplitude value, the first remaining mileage of the silicone oil shock absorber 3 is obtained. Among them, the cracking amount of the torsional amplitude value is the difference between the standard torsional amplitude value at any time within the life range of the silicone oil shock absorber 3 and the standard torsional amplitude value when the silicone oil shock absorber 3 is used for the first time, the cracking of the torsional amplitude value The amount can be used to characterize the degree of cracking of the torsional amplitude value of the silicone oil damper 3 .

With the vehicle provided in this embodiment, the remaining life of the silicone oil shock absorber 3 can be evaluated during the driving process, without the need for a separate test on the test bench, and the real-time torsional amplitude value of the silicone oil shock absorber 3 can be converted into a set temperature by converting and the standard torsional amplitude value under the set torque, and evaluate the remaining mileage of the silicone oil shock absorber 3 through the standard torsional amplitude value, which can avoid the influence of different real-time working conditions on the torsional amplitude value and ensure the accuracy of the evaluation results. sex.

It should be noted that the controller 7 in this embodiment includes a torsional vibration processor 71 and an engine electronic control unit 72, and the torsional vibration processor 71 obtains the real-time torsional amplitude value of the silicone oil shock absorber 3 according to the real-time rotational speed. The engine electronic control unit 72 and the torsional vibration processor 71 interactively obtain the real-time torsional amplitude value, and according to the corresponding relationship between temperature, torque and torsional amplitude value, convert the real-time torsional amplitude value into the silicone oil shock absorber 3 at the set temperature and the set temperature. The standard torsional amplitude value under a constant torque is obtained, and then the first remaining mileage of the silicone oil shock absorber 3 is obtained according to the corresponding relationship between the mileage and the cracking amount of the torsional amplitude value.

Optionally, the vehicle further includes a display device 8 , the display device 8 and an engine electronic control unit 72 for displaying the remaining life of the silicone oil shock absorber 3 .

Embodiment 2

As shown in FIG. 2 , this embodiment provides a method for predicting the life of a silicone oil shock absorber that can be implemented by the vehicle of the first embodiment. The method for predicting the life of a silicone oil shock absorber includes the following steps.

S100: During the running of the vehicle, the real-time temperature of the silicone oil shock absorber 3, the real-time torque of the engine 1 and the real-time rotation speed of the engine 1 are collected in real time.

Specifically, the controller 7 can collect the real-time temperature of the silicone oil shock absorber 3 through the temperature sensor 4 , obtain the real-time torque of the engine 1 through interaction with the vehicle controller 2 , and obtain the real-time rotation speed of the engine 1 through the rotational speed sensor 6 .

S110: Acquire a real-time torsional amplitude value of the silicone oil shock absorber 3 according to the real-time rotational speed.

Specifically, the formula for obtaining the real-time torsional amplitude value of the silicone oil shock absorber 3 according to the real-time rotational speed is:

按照傅里叶三角级数的展开式。公式中，t_n为时间；θ(t_n)为扭转角位移；ω_p为瞬时角速度，可通过发动机1的实时转速以及硅油减振器3的外径通过现有公式计算得到；t_c为信号盘转一圈的时间；N为转速信号盘5的总齿数；n为t_n时刻所经历过的转速信号盘5的齿数；

为平均扭转角位移，且为常数；k的取值为0.5的整数倍；θ_k为第k谐次的实时扭振幅值；δ_k为第k谐次的扭振初始相位，且为常数。in,

According to the expansion of the Fourier triangular series. In the formula, t _n is the time; θ(t _n ) is the torsional angular displacement; ω _p is the instantaneous angular velocity, which can be calculated from the real-time rotational speed of the engine 1 and the outer diameter of the silicone oil shock absorber 3 through the existing formula; t _c is The time for the signal disc to make one revolution; N is the total number of teeth of the speed signal disc 5; n is the number of teeth of the speed signal disc 5 experienced at time t _n ;

is the average torsional angular displacement and is a constant; k is an integer multiple of 0.5; θ _k is the real-time torsional amplitude value of the k-th harmonic; δ _k is the initial phase of the torsional vibration of the k-th harmonic, and is a constant.

S120: Convert the real-time torsional amplitude value to the standard torsional amplitude value of the silicone oil shock absorber 3 at the set temperature and the set torque according to the corresponding relationship between the temperature, the torque and the torsional amplitude value.

The corresponding relationship between temperature, torque and torsional amplitude value can be obtained through a large number of experiments in the early stage, and the corresponding relationship between temperature, torque and torsional amplitude value is pre-stored in the controller 7 . The set temperature is preferably the equilibrium temperature, and the set torque is preferably the torque when the vehicle is fully loaded. It can be understood that the magnitude of the torsional amplitude value of the silicone oil shock absorber 3 is affected by temperature and vehicle load. Within a certain range, with the change of temperature and the change of torque, the torsional amplitude value of the silicone oil shock absorber 3 will gradually change. However, when the temperature reaches the equilibrium temperature and the torque reaches the full load of the vehicle, the torsional amplitude value of the silicone oil shock absorber 3 will tend to be stable. Of course, the set temperature and set torque can also be set according to actual needs.

It should be noted that the set temperature and set torque of the vehicle are different under different working conditions, such as no-load, light-load and heavy-load conditions. The set temperature and set torque under the working conditions, and according to the different working conditions, the corresponding relationship of temperature, torque and torsional amplitude value is made respectively. When the vehicle is running, the vehicle controller 2 will judge the working condition of the vehicle, and the controller 7 can obtain the corresponding working condition by interacting with the vehicle controller 2, and can obtain the corresponding working condition according to the temperature and torque matching the working condition. The corresponding relationship with the torsional amplitude value converts the real-time torsional amplitude value to the standard torsional amplitude value.

In this embodiment, the corresponding relationship between temperature, torque and torsional amplitude value is:

T(t _equil , load _full )=U(t _equil -t)+L(load _full -load)+T(t, load).

Among them, t _equil is the set temperature, load _full is the set torque, t is the real-time temperature, load is the real-time torque, and T(t _equil , load _full ) is the silicone oil shock absorber 3 at the set temperature and the set torque. Standard torque amplitude value; U(t _equil -t) is the correction amount of torque amplitude value with respect to the difference between real-time temperature and set temperature, L(load _full -load) is the difference between torque amplitude value with respect to real-time torque and set torque Correction of the value; T(t, load) = θ _k . The U(t _equil -t) in this embodiment can be obtained through a large number of experiments in the early stage, and the relationship between the difference between the real-time temperature and the set temperature and the standard torque amplitude value under the set torque can be obtained and stored in the controller 7 in advance, In the same way, L (load _full -load), the relationship between the difference between the real-time torque and the set torque and the standard torque amplitude value at the set temperature can be obtained through a large number of experiments in the early stage, and stored in the controller 7, and The weights between U(t _equil -t), L(load _full -load) and T(t, load) can also be set as required.

S130: Obtain the first remaining mileage of the silicone oil shock absorber 3 according to the corresponding relationship between the mileage and the cracking amount of the torsional amplitude value.

The cracking amount of the torsional amplitude value is the difference between the standard torsional amplitude value at any time within the life span of the silicone oil shock absorber 3 and the standard torsional amplitude value when the silicone oil shock absorber 3 is used for the first time. The corresponding relationship between the mileage and the cracking amount of the torsional amplitude value can be obtained through a large number of experiments in the early stage, and the corresponding relationship between the traveling mileage and the cracking amount of the torsional amplitude value is pre-stored in the controller 7 . Specifically, in this embodiment, the corresponding relationship between the mileage and the cracking amount of the torque amplitude value is:

S _T =(T _failure -T _s1 )/V _{T_rate} ;

V _{T_rate} = (T _s1 -T _s0 )/S _b ;

Wherein, in the process of the vehicle traveling the distance S _b , the corresponding standard torsional amplitude value at the beginning is the first standard torsional amplitude value T ₁ , and the corresponding standard torsional amplitude value at the just end is the second standard torsional amplitude value T ₂ ; T _failure =T _n -T ₀ , T _s1 =T ₂ -T ₀ , T _s0 =T ₁ -T ₀ ; S _T is the remaining mileage of the silicone oil shock absorber 3; T _failure is the failure of the silicone oil shock absorber 3 The cracking amount of the torsional amplitude value; T _s1 is the cracking amount of the torsional amplitude value at the end of the process of the vehicle traveling distance S _b , T _S0 is the cracking amount of the torsional amplitude value at the beginning of the process of the vehicle traveling distance S _b , V _{T_rate} is the change rate of the cracking amount of the torsional amplitude value of the silicone oil shock absorber 3 in the process of the vehicle traveling distance S _b ; T ₀ is the preset temperature and torque when the silicone oil shock absorber 3 is used for the first time. Tn _is the standard torsional amplitude value at the set temperature and the set torque when the preset silicone oil shock absorber 3 fails. Both T ₀ and T _n can be obtained by testing the silicone oil shock absorber 3 under a preset temperature and a preset torque through a large number of preliminary tests.

In the formulas S _T =(T _failure -T _s1 )/V _{T_rate} and V _{T_rate} =(T _s1 -T _s0 )/S _b , V _{T_rate} can reflect the change rate of the cracking amount of the torsional amplitude value of the silicone oil damper 3 changes in real time.

As an alternative solution, the corresponding relationship between the mileage and the cracking amount of the torsional amplitude value can also be:

为硅油减振器3的寿命期间内的扭振幅值的裂化量的平均变化率，其为常数；

可通过前期大量试验对硅油减振器3在预设温度和预设扭矩下进行测试获得。

为硅油减振器3的剩余行驶里程，具体地，

为基于扭振幅值的裂化量的平均变化率在车辆行驶距离S_b后的剩余行驶里程。in,

is the average change rate of the cracking amount of the torsional amplitude value during the life of the silicone oil shock absorber 3, which is a constant;

It can be obtained by testing the silicone oil shock absorber 3 under a preset temperature and a preset torque through a large number of preliminary tests.

is the remaining mileage of the silicone oil shock absorber 3, specifically,

is the remaining mileage after the vehicle travels the distance S _b based on the average change rate of the cracking amount based on the torsional amplitude value.

The method for predicting the life of a silicone oil shock absorber converts the real-time torsional amplitude value of the silicone oil shock absorber 3 into a standard torsional amplitude value under a set temperature and a set torque, and uses the standard torsional amplitude value to predict the silicone oil shock absorber 3 It can avoid the influence of different real-time working conditions on the torsional amplitude value and ensure the accuracy of the evaluation results.

Embodiment 3

As shown in Figure 3, considering the parameters that can reflect the life of the silicone oil shock absorber 3, in addition to the torsional amplitude value of the silicone oil shock absorber 3, there is also the viscosity of the silicone oil, and the viscosity of the silicone oil and the torsional amplitude value of the silicone oil shock absorber 3 Synchronous cracking is not performed, which results in that if one of the torsional amplitude value and the viscosity of the silicone oil can meet the use requirements, the other can not meet the use requirements, and such a silicone oil shock absorber 3 is also unusable. Therefore, the present embodiment provides a method for predicting the life of a silicone oil shock absorber. The method for predicting the life of a silicone oil shock absorber is based on the second embodiment, and the remaining life of the silicone oil shock absorber 3 is also evaluated according to the viscosity of the silicone oil. To further ensure the accuracy of the evaluation results.

Specifically, the method for predicting the life of a silicone oil shock absorber includes the following steps.

S200: During the running of the vehicle, the real-time temperature of the silicone oil shock absorber 3, the real-time torque of the engine 1 and the real-time rotation speed of the engine 1 are collected in real time.

S210: Acquire a real-time torsional amplitude value of the silicone oil shock absorber 3 according to the real-time rotational speed.

S220: Convert the real-time torsional amplitude value to the standard torsional amplitude value of the silicone oil shock absorber 3 at the set temperature and the set torque according to the corresponding relationship between the temperature, the torque and the torsional amplitude value.

S230: Obtain the first remaining mileage of the silicone oil shock absorber 3 according to the corresponding relationship between the mileage and the cracking amount of the torsional amplitude value.

S240 : Obtain the viscosity of the base silicone oil of the silicone oil shock absorber 3 .

The specific structure of the silicone oil shock absorber 3 is shown in FIG. 4 . The silicone oil shock absorber 3 includes a casing 31 and an inertia ring 32 arranged in the casing 31. The casing 31 and the inertia ring 32 are coaxially arranged, and the inner peripheral surface of the casing 31 and There is a gap between the outer peripheral surfaces of the inertia ring 32 . The formula to obtain the base silicone oil viscosity of silicone oil shock absorber 3 is:

Wherein, η is the viscosity of the base silicone oil; ζ is the damping ratio; C _tC is the critical damping coefficient; nc is the flow index of the silicone oil; R ₁ is the outer diameter of the inertia ring 32; R ₂ is the inner diameter of the inertia ring 32; B is the inertia ring 32 thickness; δ _c is the gap between the housing 31 and the inertia ring 32; Q is the quality factor of the silicone oil, and is a constant.

S250: According to the conversion relationship between temperature, frequency and viscosity, convert the viscosity of the basic silicone oil to the standard silicone oil viscosity of the silicone oil shock absorber 3 at the set temperature and set frequency.

The corresponding relationship between temperature, frequency and viscosity can be obtained through a large number of experiments in the early stage, and the corresponding relationship between temperature, frequency and viscosity is pre-stored in the controller 7 . Among them, the conversion relationship between temperature, frequency and viscosity is:

η(t _equil , ω _q )=V(t _equil -t, ω _q )+η;

Wherein, t _equil is the set temperature; t is the real-time temperature; ω _q is the set frequency, specifically the rotational frequency of the crankshaft of the engine 1, which can be calculated by the existing formula through the rotational speed of the engine 1; η(t _equil , ω _q ) is the standard silicone oil viscosity of the silicone oil shock absorber 3 at the set temperature and the set frequency; V(t _equil -t, ω _q ) is the correction amount of the silicone oil viscosity with respect to the difference between the real-time temperature and the set temperature. V(t _equil -t,ω _q ) can be obtained through a large number of experiments in the early stage, and the relationship between the difference between the real-time temperature and the set temperature and the standard torque amplitude value at the set frequency can be obtained and stored in the controller 7 . As shown in FIG. 5 , in this embodiment, V(t _equil -t,ω _q )=p02*ω _q ² +p01*ω _q +p10*(t _equil -t)+p11*ω _q (t _equil -t)+p00, p00, p01, p02, p10 and p11 are all constants.

S260: Obtain the second remaining mileage of the silicone oil shock absorber 3 according to the corresponding relationship between the mileage and the cracking rate of the viscosity of the silicone oil.

Wherein, the cracking rate of the silicone oil viscosity is the ratio of the standard silicone oil viscosity at any time within the life span of the silicone oil shock absorber 3 to the standard silicone oil viscosity when the silicone oil shock absorber 3 is used for the first time. The corresponding relationship between the mileage and the cracking rate of the viscosity of the silicone oil can be obtained through a large number of experiments in the early stage, and the corresponding relationship of the cracking rate of the viscosity of the silicone oil is pre-stored in the controller 7 .

In this embodiment, the corresponding relationship between the mileage and the cracking rate of the silicone oil viscosity is:

S _n = (n _failure - n _s1 )/V _{n_rate} ;

V _{η_rate} = (η _s1 -η _s0 )/S _a ;

S_η为硅油减振器3的剩余行驶里程；η_failure为硅油减振器3失效时的硅油粘度裂化率；η_s1为车辆行驶距离S_a的过程中刚结束时的硅油粘度裂化率，η_S0为车辆行驶距离S_a的过程中刚开始时的硅油粘度裂化率，V_{η_rate}为车辆行驶距离S_a的过程中硅油减振器3的硅油粘度裂化率的变化率；η₀为硅油减振器3首次使用时于设定温度、设定扭矩下的标准硅油粘度；η_n为预设的硅油减振器3后失效时于设定温度、设定扭矩下的标准硅油粘度。in,

S _η is the remaining mileage of the silicone oil shock absorber 3; η _failure is the silicone oil viscosity cracking rate when the silicone oil shock absorber 3 fails; η _s1 is the silicone oil viscosity cracking rate at the end of the vehicle travel distance _Sa , η _S0 is the silicone oil viscosity cracking rate at the beginning in the process of the vehicle travel distance _{Sa, V η_rate is} the change rate of the silicone oil viscosity cracking rate of the silicone oil shock absorber 3 in the process of the vehicle travel distance Sa _; η ₀ is the silicone oil damping It is the standard silicone oil viscosity at the set temperature and the set torque when the damper 3 _is used for the first time;

In the formulas S _η =(η _failure - η _s1 )/V _{η_rate} and V _{η_rate} =(η _s1 -η _s0 )/ _{Sa, V η_rate can} reflect the change rate of the cracking amount of the torsional amplitude value of the silicone oil damper 3 changes in real time.

As an alternative solution, the corresponding relationship between the mileage and the cracking rate of silicone oil viscosity can also be:

为硅油减振器3寿命期间内的硅油粘度裂化率的平均变化率，

为硅油减振器3的剩余行驶里程，具体地，

为基于硅油粘度的裂化率的平均变化率在车辆行驶距离S_a后的剩余行驶里程。

可通过前期大量试验对硅油减振器3在预设温度和预设频率下进行测试获得。

is the average change rate of the silicone oil viscosity cracking rate during the life of the silicone oil shock absorber 3,

is the remaining mileage of the silicone oil shock absorber 3, specifically,

is the remaining mileage after the vehicle traveled distance _Sa based on the average rate of change of the cracking rate based on the viscosity of the silicone oil.

The silicone oil shock absorber 3 can be obtained by testing the silicone oil shock absorber 3 at a preset temperature and a preset frequency through a large number of experiments in the early stage.

S270 : Take the minimum value of the first remaining mileage and the second remaining mileage as the remaining life of the silicone oil shock absorber 3 .

The method for predicting the life of a silicone oil shock absorber converts the real-time torsional amplitude value of the silicone oil shock absorber 3 into a standard torsional amplitude value under a set temperature and a set torque, and uses the standard torsional amplitude value to predict the silicone oil shock absorber 3 The first remaining mileage is evaluated by converting the base silicone oil viscosity of the silicone oil shock absorber 3 to the standard silicone oil viscosity at the set temperature and the set frequency, and using the standard silicone oil viscosity to evaluate the second silicone oil shock absorber 3. The evaluation of the remaining mileage can avoid the influence of different real-time working conditions on the torsional amplitude value and ensure the accuracy of the evaluation results. In addition, by comparing the first remaining mileage with the second remaining mileage, the minimum value is taken as the remaining life of the silicone oil shock absorber 3 , so that the safety of the silicone oil shock absorber 3 is fully guaranteed.

Embodiment 4

As shown in FIG. 6 , this embodiment provides a method for predicting the life of a silicone oil shock absorber, and the method for predicting the life of the silicone oil shock absorber 3 includes the following steps.

S300: Confirm that the trigger conditions for the life of the silicone oil shock absorber 3 are met.

Specifically, the trigger conditions for confirming whether the life of the silicone oil shock absorber 3 is met include:

S301: Obtain the mileage of the vehicle after the last prediction of the life of the silicone oil shock absorber 3 ends.

The controller 7 can obtain the mileage of the vehicle after the last life prediction of the silicone oil shock absorber 3 stored in the vehicle controller 2 ends by interacting with the vehicle controller 2 .

S302: It is judged that the driving mileage is within the set mileage range.

If the mileage is within the set mileage range, execute S303 , and if the mileage is outside the set mileage range, re-confirm whether the trigger condition for the life of the silicone oil shock absorber 3 is met.

S303 : Acquire the rotational speed of the engine 1 , the real-time torque of the engine 1 and the temperature of the silicone oil shock absorber 3 .

S304: Determine whether the rotational speed of the engine 1 is within the set rotational speed range, whether the real-time torque of the engine 1 is within the set torque range, and whether the temperature of the silicone oil shock absorber 3 is within the set temperature range.

If the rotational speed of the engine 1 is within the set rotational speed range, the real-time torque of the engine 1 is within the set torque range, and the temperature of the silicone oil shock absorber 3 is within the set temperature range, it is confirmed that the trigger meets the life of the silicone oil shock absorber 3 Conditions; if the speed of the engine 1 is outside the set speed range, and/or the real-time torque of the engine 1 is outside the set torque range, and/or the temperature of the silicone oil shock absorber 3 is outside the set temperature range, then reconfirm whether Meets the triggering conditions for the life of the silicone oil shock absorber 3.

It should be noted that the set mileage range, set speed range, set torque range, and set temperature range are pre-stored in the controller 7, and the set mileage range, set speed range, set torque range, and The set temperature range can be set as required. In this embodiment, it is exemplified that the set mileage range is not less than 3,000 kilometers, and the set speed range is between the minimum speed under the maximum torque of the vehicle and the maximum idle speed; the set torque range is greater than the vehicle speed. 70% of the maximum torque; the set temperature range is at least 55°C, and the temperature is kept within ±2°C within 60s.

S310: During the running process of the vehicle, real-time temperature of the silicone oil shock absorber 3, real-time torque of the engine 1, and real-time rotational speed of the engine 1 are collected in real time.

S320: Acquire a real-time torsional amplitude value of the silicone oil shock absorber 3 according to the real-time rotational speed.

S330: Determine whether the real-time torsional amplitude value is within the first set torsional amplitude value range, when the real-time torsional amplitude value is within or beyond the first set torsional amplitude value range, perform S340, and when the real-time torsional amplitude value exceeds the first set torsional amplitude value When the torque amplitude value range is fixed, execute S350.

S340: Issue an alarm prompt.

Specifically, sound and light alarms can be issued through voice or display.

S350: Convert the real-time torsional amplitude value to the standard torsional amplitude value of the silicone oil shock absorber 3 at the set temperature and the set torque according to the corresponding relationship between the temperature, the torque and the torsional amplitude value.

S360: Determine whether the standard torsional amplitude value is within the range of the set standard torsional amplitude value, if the standard torsional amplitude value is within the set torsional amplitude value range, execute S370; if the standard torsional amplitude value is outside the set torsional amplitude value range, then Execute S300.

S370: Obtain the first remaining mileage of the silicone oil shock absorber 3 according to the corresponding relationship between the mileage and the cracking amount of the torsional amplitude value.

S380: Obtain the basic silicone oil viscosity of the silicone oil shock absorber 3.

S390: According to the conversion relationship between temperature, frequency and viscosity, convert the viscosity of the basic silicone oil into the standard silicone oil viscosity of the silicone oil shock absorber 3 at the set temperature and set frequency.

S400: Obtain the second remaining mileage of the silicone oil shock absorber 3 according to the corresponding relationship between the mileage and the cracking rate of the viscosity of the silicone oil.

S410 : take the minimum value of the first remaining mileage and the second remaining mileage as the remaining life of the silicone oil shock absorber 3 , and display the remaining life of the silicone oil shock absorber 3 on the display device 8 .

S420 : Determine the size of the remaining life of the silicone oil shock absorber 3 .

When the remaining life of the silicone oil shock absorber 3 is less than Z ₁ , execute S430; when the remaining life of the silicone oil shock absorber 3 is greater than or equal to Z ₁ and less than Z ₂ , execute S440; when the remaining life of the silicone oil shock absorber 3 When the lifetime is greater than or equal to Z ₃ , S450 is executed, wherein Z ₁ <Z ₂ <Z ₃ .

S430: The torque of the limited vehicle is within the set torque range, and the speed of the limited vehicle is within the set speed range;

S440: A reminder that maintenance is required is issued.

S450: Issue a prompt that the silicone oil shock absorber 3 is normal.

It should be noted that, in this embodiment, the specific values of Z ₁ , Z ₂ and Z ₃ can be set according to actual needs. For example, Z ₁ is 50 kilometers, Z ₂ is 10,000 kilometers, and Z ₃ is 50,000 kilometers.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (13)

1. A method for predicting the life of a silicone oil damper (3) mounted on a crankshaft of an engine (1) of a vehicle, comprising:

in the running process of a vehicle, acquiring the real-time temperature of the silicone oil damper (3), the real-time torque of the engine (1) and the real-time rotating speed of the engine (1) in real time;

acquiring a real-time torsion amplitude value of the silicone oil damper (3) according to the real-time rotating speed;

converting the real-time torsional amplitude value into a standard torsional amplitude value of the silicone oil damper (3) at a set temperature and a set torque according to the corresponding relation among the temperature, the torque and the torsional amplitude value;

acquiring a first remaining driving mileage of the silicone oil damper (3) according to a corresponding relation between the driving mileage and a cracking amount of the torsional vibration amplitude value, wherein the cracking amount of the torsional vibration amplitude value is a difference value between a standard torsional vibration amplitude value at any moment in a service life range of the silicone oil damper (3) and the standard torsional vibration amplitude value when the silicone oil damper (3) is used for the first time;

acquiring the viscosity of basic silicone oil of the silicone oil damper (3);

according to the conversion relation among the temperature, the frequency and the viscosity, converting the viscosity of the basic silicone oil into the viscosity of the standard silicone oil of the silicone oil damper (3) at the set temperature and the set frequency;

acquiring a second remaining driving mileage of the silicone oil damper (3) according to a corresponding relation between the driving mileage and a cracking rate of the silicone oil viscosity, wherein the cracking rate of the silicone oil viscosity is a ratio of a standard silicone oil viscosity at any moment in a service life range of the silicone oil damper (3) to the standard silicone oil viscosity when the silicone oil damper (3) is used for the first time;

and taking the minimum value of the first remaining driving mileage and the second remaining driving mileage as the remaining life of the silicone oil damper (3).

2. The silicone oil damper life prediction method as set forth in claim 1, characterized in that the vehicle travel distance S _a In the process, the viscosity of the corresponding standard silicone oil at the beginning is the first standard silicone oil viscosity eta ₁ The viscosity of the corresponding standard silicone oil at the beginning is the viscosity eta of the second standard silicone oil ₂ ；

The corresponding relation between the driving mileage and the cracking rate of the viscosity of the silicone oil is as follows:

S _η ＝(η _failure -η _s1 )/V _{η_rate} ；

V _{η_rate} ＝(η _s1 -η _s0 )/S _a ；

or the corresponding relation between the driving mileage and the cracking rate of the viscosity of the silicone oil is as follows:

wherein,

S _η and

the residual driving mileage of the silicone oil shock absorber (3) is obtained; eta _failure The cracking rate of the viscosity of the silicone oil when the silicone oil damper (3) fails; eta _s1 For the distance S traveled by the vehicle _a The viscosity cracking rate of silicone oil immediately after the completion of the process of (1); eta _S0 For the distance S traveled by the vehicle _a The viscosity cracking rate of the silicone oil at the beginning in the process of (1); v _{η_rate} For the distance S traveled by the vehicle _a The change rate of the silicone oil viscosity cracking rate of the silicone oil damper (3) in the process of (2); eta ₀ The standard silicone oil viscosity is set at a set temperature and a set torque when the silicone oil damper (3) is used for the first time; eta _n Set at a preset temperature when the preset silicone oil damper (3) failsStandard silicone oil viscosity at torque;

is the average change rate of the viscosity cracking rate of the silicone oil damper (3) in the service life and is constant.

3. The silicone oil damper life prediction method according to claim 1, characterized in that the silicone oil damper (3) includes a housing (31) and an inertia ring (32) disposed inside the housing (31), and the formula for obtaining the base silicone oil viscosity of the silicone oil damper (3) is:

wherein eta is the viscosity of the basic silicone oil; ζ is the damping ratio; c _tC Is a critical damping coefficient; nc is the flow index of the silicone oil; r ₁ Is the outer diameter of the inertia ring (32); r ₂ Is the inner diameter of the inertia ring (32); b is the thickness of the inertia ring (32); delta _c Is a gap between the housing (31) and the inertia ring (32); q is the quality factor of silicone oil and is a constant.

4. The method for predicting the life of the silicone oil damper according to claim 3, wherein the conversion relationship among the temperature, the frequency and the viscosity is as follows:

η(t _equil ，ω _q )＝V(t _equil -t,ω _q )+η；

wherein, t _equil To a set temperature; t is the real-time temperature; omega _q To set the frequency; eta (t) _equil ，ω _q ) The standard silicone oil viscosity of the silicone oil damper (3) at a set temperature and a set frequency is set; v (t) _equil -t,ω _q ) Correction of the difference between the viscosity of the silicone oil with respect to the real-time temperature and the set temperatureA positive amount.

5. The silicone oil damper life prediction method according to claim 1, characterized in that the magnitude of the remaining life of the silicone oil damper (3) is judged;

when the residual life of the silicone oil damper (3) is less than Z ₁ When the vehicle speed is within the set speed range, limiting the torque of the vehicle to be within the set torque range;

when the residual life of the silicone oil damper (3) is greater than or equal to Z ₁ And is less than Z ₂ Sending out a prompt of needing maintenance;

when the residual life of the silicone oil damper (3) is greater than or equal to Z ₃ When the shock absorber is normal, a prompt that the silicone oil shock absorber (3) is normal is sent;

wherein Z is ₁ ＜Z ₂ ＜Z ₃ 。

6. The silicone oil damper life prediction method according to claim 1,

vehicle running distance S _b In the process of (3), the corresponding standard torque amplitude value at the beginning is the first standard torque amplitude value T ₁ The standard torque amplitude value corresponding to the end is the second standard torque amplitude value T ₂ ；

The corresponding relation between the driving mileage and the cracking amount of the torsional amplitude value is as follows:

S _T ＝(T _failure -T _s1 )/V _{T_rate} ；

V _{T_rate} ＝(T _s1 -T _s0 )/S _b ；

or the corresponding relation between the driving mileage and the cracking amount of the torsional amplitude value is as follows:

wherein, T _failure ＝T _n -T ₀ ，T _s1 ＝T ₂ -T ₀ ，T _s0 ＝T ₁ -T ₀ ；S _T And

the residual driving mileage of the silicone oil shock absorber (3) is obtained; t is _failure The cracking quantity is the torsional amplitude value when the silicone oil damper (3) fails; t is _s1 For the distance S traveled by the vehicle _b Amount of cracking, T, of torsional vibration amplitude value immediately after the completion of the process of (1) _S0 For the distance S traveled by the vehicle _b Amount of cracking, V, of torsional vibration amplitude value at the beginning of the process of (1) _{T_rate} For the distance S traveled by the vehicle _b The change rate of the cracking amount of the torsional amplitude value of the silicone oil damper (3) in the process; t is ₀ The method comprises the steps that a preset standard torsion amplitude value of the silicone oil damper (3) under a set temperature and a set torque is obtained when the damper is used for the first time; t is _n The standard torsion amplitude value is a standard torsion amplitude value under a set temperature and a set torque when the preset silicone oil damper (3) fails;

is the average change rate of the cracking amount of the torsional vibration amplitude value in the service life of the silicone oil damper (3) and is constant.

7. The silicone oil damper life prediction method according to claim 1, characterized in that a crankshaft is provided with a tachometer signal panel (5), a tachometer sensor (6) is used for acquiring the angle of rotation of the tachometer signal panel (5), and the formula for acquiring the real-time torsional amplitude value of the silicone oil damper (3) according to the real-time rotational speed is as follows:

wherein, t _n Is time; theta (t) _n ) Is torsional angular displacement; omega _p Is the instantaneous angular velocity; t is t _c For turning the signal panel by one turnThe time of (d); n is the total number of teeth of the rotating speed signal panel (5); n is t _n The number of teeth of the rotating speed signal disc (5) which is experienced at the moment;

is the average torsional angular displacement and is constant; k is an integral multiple of 0.5; theta _k A real-time torsional amplitude value at the kth harmonic; delta _k Is the initial phase of torsional oscillation at the k-th harmonic and is constant.

8. The method for predicting the service life of the silicone oil damper according to claim 7, wherein the corresponding relationship among the temperature, the torque and the torsional amplitude value is as follows:

T(t _equil ，load _full )＝U(t _equil -t)+L(load _full -load)+T(t，load)；

wherein, t _equil To set the temperature, load _full For set torque, T is the real time temperature, load is the real time torque, T (T) _equil ，load _full ) The standard torsion amplitude value of the silicone oil damper (3) at a set temperature and a set torque is obtained; u (t) _equil -t) correction of the torque amplitude value with respect to the difference between the real time temperature and the set temperature, L (load) _full Load) is a correction of the torque amplitude value with respect to the difference between the real-time torque and the set torque; t (T, load) ═ θ _k 。

9. The method for predicting the service life of the silicone oil damper according to claim 1, wherein after acquiring the real-time torsional amplitude value, whether the real-time torsional amplitude value is within a first set torsional amplitude value range is determined, when the real-time torsional amplitude value is within or exceeds the first set torsional amplitude value range, the real-time torsional amplitude value is converted into a standard torsional amplitude value of the silicone oil damper (3) under a set temperature and a set torque, and when the real-time torsional amplitude value exceeds the first set torsional amplitude value range, an alarm prompt is given.

10. The method for predicting the service life of the silicone oil damper according to claim 1, wherein after a standard torsional amplitude value is obtained, whether the standard torsional amplitude value is within a set standard torsional amplitude value range is judged, and if the standard torsional amplitude value is within the set torsional amplitude value range, the obtaining of the first remaining driving mileage of the silicone oil damper (3) is performed.

11. The silicone oil damper life prediction method as set forth in any one of claims 1-10, characterized in that it further comprises, before the real-time temperature of the silicone oil damper (3) and the real-time torque of the engine (1) are collected in real time during the running of the vehicle:

confirming that the trigger condition of the service life of the silicone oil damper (3) is met.

12. The silicone oil damper life prediction method according to claim 11, characterized in that confirming that the trigger condition for the life of the silicone oil damper (3) is met includes:

acquiring the driving mileage of the vehicle after the service life of the last silicone oil damper (3) is predicted to be finished;

judging and confirming that the driving mileage is within the set mileage range;

acquiring the rotating speed of an engine (1);

acquiring real-time torque of an engine (1);

acquiring the temperature of the silicone oil damper (3);

and judging and confirming that the rotating speed of the engine (1) is within a set rotating speed range, the real-time torque of the engine (1) is within a set torque range, and the temperature of the silicone oil damper (3) is within a set temperature range, and then confirming that the trigger condition of the service life of the silicone oil damper (3) is met.

13. A vehicle, characterized in that the vehicle comprises:

an engine (1);

the vehicle control unit (2) can acquire real-time torque output by the engine (1);

a silicone oil damper (3) provided on a crankshaft of the engine (1);

a temperature sensor (4) for acquiring the temperature of the silicone oil damper (3),

a rotational speed signal panel (5) provided to a crankshaft of the engine (1);

the rotating speed sensor (6) is used for acquiring the rotating angle of the rotating speed signal panel (5);

the controller (7) is connected with the temperature sensor (4) to acquire the real-time temperature of the silicone oil damper (3); is connected with the rotating speed sensor (6) to acquire the real-time rotating speed of the engine (1); for interacting with said vehicle control unit (2) to obtain said real-time torque, said controller (7) being adapted to carry out the silicone oil damper life prediction method of any one of claims 1 to 12.

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