Passive car safety system updating at head-on collision with lorry

Сергей Бишутин; Sergey Bishutin; Мария Дашунина; Mariya Dashunina

doi:10.12737/16972

Passive car safety system updating at head-on collision with lorry

Bulletin of Bryansk state technical university ◽

10.12737/16972 ◽

2015 ◽

Vol 2015 (4) ◽

pp. 5-10

Author(s):

Сергей Бишутин ◽

Sergey Bishutin ◽

Мария Дашунина ◽

Mariya Dashunina

Keyword(s):

Shock Absorber ◽

General System ◽

Front Wheel ◽

Passive Safety ◽

Pneumatic Cylinder ◽

Front Side ◽

Blow Energy ◽

Life Saving ◽

Car Safety ◽

Brake Application

At emergency brake application before collision a car clearance decreases considerably, a car front side comes lower and actually does not participate in blow energy absorption. A car “dives under” a lorry and al-most all blow energy falls to the roof and windshield posts which do not figure on the perception of such a load that often results in fatal consequences. To reduce weight of consequences after such a collision there was developed a design for a passive car safety. The device consists of a ring pneumatic cylinder which is situated round a front shock strut next the upper bearing of a shock absorber and connected with a squib. It is intended for lifting and car body fixation along the height before a collision with a lorry. There are two such devices installed in a motor car, with one for each front wheel. It is not difficult to make this device there is no need in essential changes in the car design. It can be installed in any car with front posts of the type «macferson». The offered device is integrated in the general system of a car passive safety and at unavoidable head collision with a lorry is activated by means of a squib explosion. Key words: life-saving device, car, head-on collision, lorry.

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Analysis of Concurrent Brake Application for Underbone Motorcycle

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.980.107 ◽

2014 ◽

Vol 980 ◽

pp. 107-111

Author(s):

M. Hisyam Basri ◽

A.H. Zulkifli ◽

N.I. Ismail ◽

Sharzali Che Mat ◽

M.M. Mahadzir

Keyword(s):

Front Wheel ◽

Motion Equation ◽

Force Component ◽

Braking Performance ◽

Preliminary Results ◽

Brake Application ◽

Brake Force ◽

Safety Range ◽

Wheel Brake ◽

Force Intensity

The application of single front wheel brake can yield large deceleration on underbone motorcycle. However, the motorcycle motion potentially exposed to the nosedive effect during this application. Therefore, in order to avoid this issue, the application of concurrent brake are required. Hence, this research was carried out to understand the basic braking performance for underbone motorcycle and elucidate the influenced of concurrent braking application involving the front and rear brake component. A theoritical study was carried out in this work through the derivation of motion equation for underbone motorcycle. The preliminary results showed that the total brake force and the brake force component acting on the front wheel had increased linearly with its deceleration intensity. Further study showed that in order to achieve higher safety range, the brake force applied on the front wheel should be at least 70% higher than the rear brake force intensity. This is probably due to the weight transferred condition during the underbone motorcycle braking.

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A New Type Adjustable Shock Absorber and its Characteristic Model

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.3423 ◽

2010 ◽

Vol 97-101 ◽

pp. 3423-3427

Author(s):

Jun Xiu Hu ◽

Hao Bin Jiang ◽

Chen Long ◽

Tao Wang

Keyword(s):

Shock Absorber ◽

Structural Parameters ◽

Hydrodynamic Theory ◽

Pneumatic Cylinder ◽

Bench Test ◽

Damping Force ◽

Characteristic Model ◽

Air Suspension ◽

Beam Method ◽

New Type

A new type adjustable hydraulic shock absorber for a bus air suspension is designed, the solenoid valve and swing pneumatic cylinder are adopted as driving device for changing damping states. The structure and work principle of the shock absorber is introduced. By applying hydrodynamic theory, a mathematical model of shock absorber’s damping characteristic is built. Several typical algorithms for calculating damping valve plate’s deflection are analyzed. Conjugate Beam Method, an approximate method with relatively less calculation work, is chosen to calculate the deflection of valve plates. Main structural parameters’ affecting on shock absorber’s damping performance are simulated, the shock absorber specimen is manufactured. The bench test results of specimen show, “hard” and “soft” damping states switch reliably, damping force deviations between test and simulation results are less than 4%. It is verified the established model for adjustable shock absorber is correct, the Conjugate Beam Method for calculating valve plates’ deflection is effective.

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Passive Safety System for Side Impact in Cars

Shanlax International Journal of Arts, Science and Humanities ◽

10.34293/sijash.v7i4.1623 ◽

2020 ◽

Vol 7 (4) ◽

pp. 115-120

Author(s):

P Sabarinath

Keyword(s):

High Pressure ◽

Solenoid Valve ◽

Side Impact ◽

Passive Safety ◽

Pneumatic Cylinder ◽

Impact Zone ◽

Car Seats ◽

Passive Safety System ◽

Design Idea ◽

The Impact

The ultimate aim of this work is to provide the safest ride for the peoples. The following contribution is to protect the precious life of the driver and the co-passengers during the accidents by increasing the distance between the impact zone and the passengers, peculiarly during the crash on the sides. This can be achieved by incorporating a pneumatic cylinder under the seats, which is then actuated by the solenoid valve triggered by the deformation caused by the crashing vehicle. This makes the seats tilted at the time of the accident away from the near side of the door, which saves the life. The high-pressure energy in the container gives ultimate kinetic energy using high velocity gives a sudden actuation of seats in a fraction of seconds clearly say 0.3 seconds. We have re-designed the structure and mechanism of car seats to make it possible to save precious lives. Our design idea does not stop with single possible way of saving the life, it extends to lot of customization and adaptability based on the car structure and available space specific to various brands and models.

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A Contrastive Analysis of the Crashworthiness between 22MnB5 and DP590 Front Bumper Inner Plates

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.538-541.959 ◽

2012 ◽

Vol 538-541 ◽

pp. 959-964

Author(s):

Yi Ming Zhao ◽

Hong Xie ◽

Jian Ping Lin

Keyword(s):

High Strength Steel ◽

Collision Energy ◽

High Strength ◽

Hot Forming ◽

Passive Safety ◽

Contrastive Analysis ◽

Advanced High Strength Steel ◽

Front Side ◽

Maximum Displacement ◽

Absorption Section

The front bumper inner plate was researched based on contrastive analysis of the crashworthiness considering using 22MnB5, a typical hot forming AHSS (Advanced High Strength Steel) and DP590, a kind of general high strength steel. In this paper, we contrasted energy absorption, section force, and maximum displacement of the two different front bumper systems in low-speed collision. The analysis shows the front bumper inner plate using hot forming AHSS can improve the crashworthiness of automobiles and make it more balanced and reasonable to transfer collision energy and force. As a result, the maximum displacement of the front bumper system decreases and other parts such as front side rails can be safer. Thus, using hot forming AHSS in designing a front bumper inner plate can improve the passive safety of automobiles.

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