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Double cross arm independent rear suspension of equation type racing car and method for controlling linear rigidity thereof

A formula car, independent suspension technology, applied in the direction of suspension, racing car, elastic suspension, etc., can solve poor stability, formula car comfort and safety impact, difficult suspension line stiffness and roll stiffness are relatively independent Adjustment and other issues to achieve the effect of improving line rigidity and handling stability

Inactive Publication Date: 2019-03-15
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of vehicle manufacturing technology, the driving speed of formula racing cars continues to increase. People pay more and more attention to the driving stability and safety of formula racing cars. At the same time, people's requirements for driving comfort are also increasing. Independent suspension commercial vehicles can no longer meet the requirements of ride comfort and handling stability
[0003] Double-wishbone independent suspension has been widely used in formula racing cars due to its better handling stability and comfort, and there are still a small number of double-wishbone independent suspensions on the market, but the two independent double-wishbone independent suspensions The suspension is rigidly connected, so it is difficult to achieve relatively independent adjustment of the suspension line stiffness and roll stiffness, and the steering stability is poor when the wheel jumps, which has a certain impact on the comfort and safety of driving a formula car

Method used

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  • Double cross arm independent rear suspension of equation type racing car and method for controlling linear rigidity thereof
  • Double cross arm independent rear suspension of equation type racing car and method for controlling linear rigidity thereof
  • Double cross arm independent rear suspension of equation type racing car and method for controlling linear rigidity thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: The double-wishbone independent rear suspension of formula racing car, constitutes as Figure 1-3 As shown, it includes an independent suspension assembly symmetrically arranged on both sides of the rear of the vehicle frame 24. The independent suspension assembly includes a connecting block 7 connected to the rear suspension push rod 14, and an independent spring is connected to the connecting block 7. 8. The other end of the independent spring 8 is connected to the rear arm bar 28 of the vehicle frame 24 . The connecting blocks 7 on both sides are respectively hinged with a set of connecting plates 3, and the anti-roll bar 2 is arranged between the two sets of connecting plates 3, and the anti-roll bar hanger 1 is arranged on the anti-roll bar 2, and the anti-roll bar hangs The ear 1 is fixed on the frame 24 by welding. The connecting plate 3 is provided with a plurality of through holes 4, and the end of the short shaft 6 is provided with an adjusting ...

Embodiment 2

[0053] Embodiment 2: Simulation Analysis of Wheel Jump

[0054] The simulation parameters of the double-wishbone independent suspension are set as wheelbase 1550mm, sprung mass 1212kg, center of mass height 300mm, tire static diameter 228.6mm, tire stiffness 140N / mm, tire mass 3.5kg, and effective travel of the wheel jump 50mm. The length of the spring shock absorber is 200mm, and the length of the third spring is 270mm. The simulation results of wheel jump in the same direction are as follows: Figure 4 Shown:

[0055] exist Figure 4 The middle is the comparison of the displacement changes of the independent spring and the third spring of the double-wishbone independent rear suspension. The change amount of the independent spring and the third spring is almost equal when the wheel jumps in the same direction, that is, the transmission ratio of the third spring can be almost equal to that of the independent spring by rationally designing the mechanical structure. It shows ...

Embodiment 3

[0057] Embodiment 3: Simulation analysis of step steering

[0058] Perform step steering simulations for different stiffnesses of the third spring (125lbs / in and 250lbs / in), and the simulation result curves are as follows Figure 7 shown.

[0059] Figure d shows that the change curves of the third spring with different stiffnesses to the body roll angle after step steering are basically coincident, indicating that the third spring has almost no influence on the vehicle roll.

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Abstract

The invention discloses a double cross arm independent rear suspension of an equation type racing car and a method for controlling the linear rigidity thereof, the suspension comprises connecting blocks arranged on both sides of a frame, the two connecting blocks are respectively hinged with a group of connecting plates, anti-roll rods are arranged between the two groups of connecting plates, eachanti-roll rod is provided with an anti-roll rod lifting lug which is fixed on the frame; a third spring is arranged between the two connecting blocks, the third spring comprises a piston base, a first limit table edge is arranged on the piston base, a piston front rod is arranged at the front part of the piston base, a second limit table edge is arranged at the tail end of the piston front rod, adamping spring is arranged between the first limit table edge and the second limit table edge; the bottoms of the connecting blocks at the two sides are provided with supporting seats which are fixedat the two sides of the frame. In addition, the suspension also can effectively reduce the head-up angle change, enable the posture of the car body to recover more quickly and improve the response time.

Description

technical field [0001] The invention relates to a double-wishbone independent suspension, in particular to a double-wishbone independent rear suspension of a formula racing car and a control method for its linear stiffness. Background technique [0002] With the development of vehicle manufacturing technology, the driving speed of formula racing cars continues to increase. People pay more and more attention to the driving stability and safety of formula racing cars. At the same time, people's requirements for driving comfort are also increasing. Independent suspension commercial vehicles can no longer meet the requirements of ride comfort and handling stability. [0003] Double-wishbone independent suspension has been widely used in formula racing cars due to its better handling stability and comfort, and there are still a small number of double-wishbone independent suspensions on the market, but the two independent double-wishbone independent suspensions The suspension is ...

Claims

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Application Information

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IPC IPC(8): B60G3/20B60G11/48B60G17/02
CPCB60G3/20B60G11/48B60G17/02B60G17/021B60G2204/143B60G2300/27B60G2800/20
Inventor 赵璐李强
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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