Automobile dual-mass flywheel with continuous varied stiffness and high torque

A dual-mass flywheel and high-torque technology, applied in flywheels and other directions, can solve problems such as sudden changes in stiffness, sudden changes in stiffness, and difficulty in meeting the requirements of large torques, so as to avoid impact loads and noises, improve buffering capacity, and withstand The effect of small load

Inactive Publication Date: 2011-11-02
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depend on figure 1 It is known that the dual-mass flywheel with segmental combined stiffness is more flexible at small torsion angles, and has greater resistance torque at large torsion angles. However, although the torque characteristics are continuous, the torque characteristics of each segment are still linearly changing. When switching, the stiffness changes suddenly, that is, the stiffness jump phenomenon occurs, resulting in impact load and noise when the gearbox gears mesh, and the structure is complex
figure 1 The thin solid line 2a is a dual-mass flywheel with single-stage stiffness. Its torque curve is approximately an obli

Method used

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  • Automobile dual-mass flywheel with continuous varied stiffness and high torque
  • Automobile dual-mass flywheel with continuous varied stiffness and high torque
  • Automobile dual-mass flywheel with continuous varied stiffness and high torque

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Dual-mass flywheel for 2.0L car engine, the structure is as follows figure 2 shown.

[0092] The maximum output torque / speed of the engine is 185N.m / 4500rpm, the idle speed of the engine is 750rpm, the maximum speed is 7000rpm, and the common speed is 2500-4500rpm.

[0093] The parameters are as follows: Six sets of shock absorbers are used, the diameter of the damping spring steel wire of the shock absorber is d=2.1mm, and the middle diameter is D 0 =15.3mm, pitch P=5.8mm, effective number of turns n=10.5, initial length of damping spring L 0 =66mm, preload length Lj=65mm, damping spring line stiffness k t =5.17N / mm, distribution radius R 3 =112.5mm, the maximum diameter R of the inner wall of the primary flywheel 0 =127.75mm, corrected arc radius R 1 =105mm, radius R of circumscribed circle of secondary flywheel 2 =106.1mm, apex angle γ=139°, idle angle θ=3, friction damping bearing torque M f =7N.m, η=6.5°, Δr max =2.29mm, allowable maximum torsion angle α ...

Embodiment 2

[0100] 2.3L-2.4L car engine dual-mass flywheel, the structure is as follows figure 2 shown.

[0101] The maximum output torque / speed of the engine is 220-240N.m / 4200rpm, the idle speed of the engine is 800rpm, the maximum speed is 6500rpm, and the common speed is 2500-4500rpm.

[0102] The parameters are as follows: Six sets of shock absorbers are used, the diameter of the damping spring steel wire of the shock absorber is d=2.3mm, and the middle diameter is D 0 =15.3mm, pitch P=5.9mm, number of effective turns n=10.5, initial length of damping spring L 0 =67mm, preload length Lj=66mm, damping spring line stiffness k t =7.44N / mm, distribution radius R 3 =112.5mm, the maximum diameter R of the inner wall of the primary flywheel 0 =127.75mm, corrected arc radius R 1 =105mm, radius R of circumscribed circle of secondary flywheel 2 =106.1mm, apex angle γ=139°, idle angle θ=3, friction damping bearing torque M f =7N.m, η=6.5°, Δr max =2.29mm, allowable maximum torsion angl...

Embodiment 3

[0109] 3.0L car engine dual mass flywheel, the structure is as follows Figure 14 shown.

[0110] The maximum output torque / speed of the engine is 295N.m / 4500rpm, the idle speed of the engine is 800rpm, the maximum speed is 6500rpm, and the common speed is 2000~4500rpm.

[0111] The parameters are as follows: Five sets of shock absorbers are used, the diameter of the damping spring steel wire of the shock absorber is d=2.5mm, and the middle diameter is D 0 =15.3mm, pitch P=6.1mm, effective number of turns n=13.5, initial length of damping spring L 0 =88mm, preload length Lj=87mm, damping spring wire stiffness k t =8.08N / mm, distribution radius R 3 =112.5mm, the maximum diameter R of the inner wall of the primary flywheel 0 =127.75mm, corrected arc radius R 1 =105mm, radius R of circumscribed circle of secondary flywheel 2 =108.2mm, apex angle γ=132°, idle angle θ=3, friction damping bearing torque M f =10N.m, η=6.5°, Δr max =3.60mm, allowable maximum torsion angle α m...

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Abstract

The invention discloses an automobile dual-mass flywheel with continuous varied stiffness and high torque. The flywheel comprises a starting gear ring, a primary flywheel, a secondary flywheel, a first spring seat, a second spring seat and a shock-absorbing spring; the secondary flywheel forms an arc transition curve surface II at the middle part of each surface; the circumference of the inner wall of the primary flywheel is provided with protrusion blocks, and the middle parts of the inner walls between the adjacent protrusion blocks form raised transition curve surfaces I; a shock-absorbingcontaining cavity is formed between the primary flywheel and the secondary flywheel; the first spring seat and the second spring seat can be movably arranged in the shock-absorbing containing cavity,and the shock-absorbing spring is arranged between the first spring seat and the second spring seat. By utilizing the flywheel, the favorable property and combined friction property of continuous varied stiffness of which the torque property nonlinearity increases as the increasing of a torsion angle can be obtained, and the impact to a gear box by the torsion vibration is reduced and absorbed; and under the condition of satisfying the same maximal torque, not only the flywheel has flexibility with a small torsional angle, and simultaneously the loading bored by the shock-absorbing spring is less.

Description

technical field [0001] The invention relates to a dual-mass flywheel of an automobile transmission system power assembly, in particular to a dual-mass flywheel between an automobile engine and a clutch gearbox. Background technique [0002] With the emergence of more and more powerful engines and the improvement of the overall driving performance requirements of automobiles, the development of dual-mass flywheels is facing more and more severe challenges. In order to adapt to the flexibility of low speed and small torque, the first-order resonance speed is reduced below the engine idle speed to avoid first-order resonance and high speed, high torque and high resistance torque. The high rigidity makes the maximum resistance torque greater than the maximum torque of the engine and has overload protection. LUK and others have developed a dual-mass flywheel with segmented combined stiffness. Each group of shock absorbers consists of multiple springs from series to single and fin...

Claims

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Application Information

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IPC IPC(8): F16F15/31
Inventor 宋立权周建东李奇敏
Owner CHONGQING UNIV
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