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A suspension system optimization method and device

A technology of a suspension system and an optimization method, applied in the field of vehicles, can solve problems such as no early design stage of vehicle products, and achieve the effects of shortening the product development cycle, reducing the problem of engine starting vibration, and reducing complexity

Active Publication Date: 2020-07-28
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims to propose a suspension system optimization method to solve the problem that in the existing suspension system optimization method, the engine idle vibration optimization design and the engine startup vibration optimization are not considered in the early design stage of the vehicle product. design problem

Method used

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  • A suspension system optimization method and device
  • A suspension system optimization method and device
  • A suspension system optimization method and device

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Embodiment 1

[0070] refer to figure 1 , shows a flow chart of the steps of a suspension system optimization method according to an embodiment of the present invention, which may specifically include the following steps:

[0071] Step 101: Determine the excitation force, including: determining the excitation force required for starting the engine according to the starting cylinder pressure and engine parameters of the engine, the excitation force includes overturning moment and reciprocating inertial force.

[0072] In the embodiment of the present invention, a powertrain model can be established. According to the starting cylinder pressure of the engine parameters of the engine, the powertrain model is used to determine the excitation force required for starting the engine. The excitation force includes overturning moment and reciprocating inertial force.

[0073] Step 102: Determine the target dynamic stiffness parameters, including: determining the transient target dynamic stiffness par...

Embodiment 2

[0087] refer to figure 2 , shows a flow chart of steps of another suspension system optimization method according to an embodiment of the present invention, which may specifically include the following steps:

[0088] Step 201: Determine the excitation force, including: determining the excitation force required for starting the engine according to the starting cylinder pressure and engine parameters of the engine, the excitation force includes overturning moment and reciprocating inertial force.

[0089] Step 202: Determine the target dynamic stiffness parameters, including: determining the transient target dynamic stiffness parameters of the suspension system under the engine starting condition.

[0090] In practical applications, the dynamic stiffness parameters of the mount system vary at different amplitudes and frequencies. The general dynamic stiffness parameters refer to the dynamic stiffness of the mount system at ±0.1mm amplitude and 25Hz frequency parameter, howeve...

Embodiment 3

[0132] refer to Figure 5 , which shows a structural block diagram of a suspension system optimization device according to an embodiment of the present invention, which may specifically include:

[0133] The excitation force determination module 501 is used to determine the excitation force, including: determining the excitation force required for starting the engine according to the starting cylinder pressure and engine parameters of the engine, the excitation force includes overturning moment and reciprocating inertial force;

[0134] A target dynamic stiffness parameter determining module 502, configured to determine a target dynamic stiffness parameter, including: determining a target dynamic stiffness parameter of the suspension system transient under engine starting conditions;

[0135] The evaluation parameter determination module 503 is used to determine the evaluation parameters, including: according to the excitation force and the target dynamic stiffness parameter, ...

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Abstract

The invention provides a suspension system optimization method and a device. The suspension system optimization method comprises the following steps: determining the excitation force; determining thetarget dynamic rigidity parameters; determining the evaluation parameters comprising an engine idling vibration evaluation parameter and a transmitter starting vibration evaluation parameter accordingto the excitation force and the target dynamic rigidity parameter. To determine the parameters, whether the engine idling vibration evaluation parameter and the transmitter starting vibration evaluation parameter meet preset conditions is considered. Therefore, the system outputs the target dynamic rigidity parameter if the engine idling vibration evaluation parameter and the transmitter startingvibration evaluation parameter meet preset conditions. The suspension system optimization method can simultaneously optimize engine idling speed vibration and the engine starting vibration in the early design phase of a vehicle product, so that the complexity of the suspension system is reduced, the product development period is shortened, and the development cost of the vehicle product is reduced.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a suspension system optimization method and device. Background technique [0002] Noise, vibration and harshness (Noise, Vibration, Harshness, NVH) performance is a comprehensive index to measure the quality of vehicle manufacturing. Since NVH performance is the most direct and superficial feeling for vehicle users, as the vehicle With the popularization of vehicles, users' requirements for the NVH performance of vehicles are also increasing day by day. [0003] Since the vibration of the engine accounts for the main part of the vibration of the vehicle, in order to reduce the vibration of the engine, it is often necessary to optimize the suspension system of the vehicle engine in practical applications. During the operation of existing vehicles, the vibration amplitude of the engine during the normal starting process is often 4 to 7 times that of the idling state. Therefore, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K5/12B62D65/00G06F30/15
CPCB60K5/12B62D65/00G06F30/15Y02T90/00
Inventor 鲍金龙张慧芳石岩赵珂白炜
Owner GREAT WALL MOTOR CO LTD
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