Motor vehicle collision device with differential-pressure stop valve

Abstract

A motor vehicle collision device with a differential-pressure stop valve comprises at least two piston cylinders, at least two pistons, at least two piston cylinder screw hole connectors, at least four high-pressure connection pipes, at least two switch control energy dampers and a differential-pressure stop valve; the differential-pressure stop valve comprises a stop valve substrate assembly, a stop valve rod assembly, a first T-shaped top plate, a second T-shaped top plate, a first top-plate spring, a second top-plate spring, a first end cover and a second end cover; and when the difference of the hydraulic force applied on an annular area of the first stop valve rod and the second stop valve rod is greater than the advance-applied force of the top plate springs, the pressure connection between the first high-pressure connection pipe and a second high-pressure connection pipe as well as between the third high-pressure connection pipe and the fourth high-pressure connection pipe is disconnected by the stop valve rod assembly, so that a switch valve rod assembly at the early state of the offset collision can be prevented from being forcedly opened in advance, and the offset collision capacity of a motor vehicle can be greatly improved.

Description

technical field [0001] The invention relates to a motor vehicle collision device, in particular to a motor vehicle collision device with a differential pressure stop valve. Background technique [0002] Since the advent of motor vehicles in 1886, while bringing convenience to human life and work, road traffic accidents have also caused a large number of casualties and property losses. So far, more than 34 million people have died in car accidents worldwide, while hundreds of millions of people have been injured or disabled. According to the "Global Status of Road Safety" report published by the World Health Organization (WHO) on June 15, 2009, the number of deaths involving road traffic accidents in 2008 was as high as 1.2 million, and 20 to 30 million were injured or disabled. The annual economic loss caused by traffic accidents exceeds 700 billion US dollars. [0003] The body of the existing motor vehicle is in a compressed state during the impact process. On the one ha...

AI Technical Summary

Problems solved by technology

In addition, the anti-rear collision performance of existing motor vehicles is obviously worse than the anti-frontal collision performance, which is the main reason for the relatively high death rate in rear-end collision accidents.

[0004] The patent 201010549637.8 submitted by the applicant discloses a motor vehicle collision device with a switch-controlled energy consumer. This patent can well solve the complete frontal collision of the car and can completely absorb all the energy of the motor vehicle. In addition, this patent still exists The following problems: ① Cannot solve the problem of absorbing energy in the process of offset collision

If the offset collision (40% offset) occurs on the left side of the motor vehicle, only the left piston push rod pushes back with the piston, and only the left switch-controlled energy consumer consumes energy. The switch-controlled energy consumer on the left side of the effective stroke cannot absorb the kinetic energy of the entire motor vehicle; ② when processing the pressure relief holes (1615, 1629) and the high-pressure communication holes (1613, 1627), the process holes must be drilled, and then the process holes must be drilled. Plugging with screws or welding; ③When the drill hole reaches the bottom of the upper valve cylinder (1607, 1621), the drill bit is easily damaged due to asymmetry; ④In the later stage of the collision, because the switch valve stem assembly will gradually close, A larger proportion of antifreeze enters the annular space between the piston cylinder and the piston top rod, and the pressure in the annular space between the piston cylinder and the piston top rod will increase rapidly from negative pressure to high pressure, and the pressure relief valve with holes ( 1616, 1630) will close the pressure relief hole (patent 201010549637.8 Figure 13 ), once the pressure in the annular space is greater than a certain value, the switch valve stem assembly will be forcibly pulled up, the effective injection hole area will suddenly increase, and the pressure in the pressure guide tube will drop rapidly, resulting in a decrease in the acceleration of the B-pillar in the later stage of the collision. Cannot reach the ideal collision curve

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