What is seats anti submarining

Anti-submarining seats in a Volvo. The metal plate is highlighted in red. Drivers who are even more up to date will want to know if features such as a blind spot monitor and autonomous emergency braking are available. Few motorists, however, are aware of anti-submarining or anti-submarine seats for front passengers.

Anti-submarine seats have a metal plate at their base. This helps reduce the risk of the passenger sliding down or submarining in the event of a collision. Car safety: 5 features to look for in a new car. Even if the occupant is secured with a three-point seat belt, this may not prevent him or her from sliding down in a collision.

All the features along with its overhanging structure make it less desirable for anti-submarining performance. A seatbelt equipped with a pretensioner and a load-limiter further improves the occupant kinematics by allowing forward rotation of the upper torso with adequate pelvis restraint.

This systematic approach to injury prevention is crucial to Indian conditions. During the impact phase, vehicles crashworthy performance is the single most important factor that prevents or reduces the severity of injuries to the occupants.

The weather conditions during the crash were good with dry road surface and good light conditions. The posted speed limit at the crash site was 55 mph 88 kph. A stiff fixed contoured anti-submarining seat pan with a seat belt equipped with load-limiter and pretensioner is the best countermeasure to tackle occupant submarining and subsequent abdominal injuries.

The stiffer fixed, properly supported seat pan, instead of a cantilever seat pan would have prevented the downward deflection of the pan while the forward excursion of the pelvis. This downward dynamic deflection worsened the lap belt riding on the abdomen. This knowledge will assist Indian automotive design engineers to develop a more effective injury prevention scheme for rear seat passengers. Emergency medical responders will also benefit from this study by identifying and understanding the submarining and suspecting serious underlying abdominal injuries.

This knowledge facilitates in prompt diagnosis and treatment of injuries. The downward dynamic deflection of the rear seat pan and the unavailability of advanced seat belt features such as load-limiter and pretensioner are the fatal injuries producing cause in the crash investigated.

The study explains the injury mechanism and countermeasures to prevent such injuries. The occupant died due to his abdominal injuries after 20 days in the hospital. The author gratefully acknowledges the consent of a family member for the publication of this case study.

Source of Support: Nil. Conflict of Interest: None declared. National Center for Biotechnology Information , U. J Family Med Prim Care. Chandrashekhar K. Thorbole 1. Author information Copyright and License information Disclaimer. Address for correspondence: Dr. E-mail: moc. Abstract The purpose of this study and a case report was to demonstrate seat belt webbing induced injury due to seatbelt submarining during the frontal motor vehicle crash. Keywords: Contoured seat pan, liver, load-limiter, pretensioner, submarining.

Introduction The seatbelt is the most important safety device in the vehicle protecting an occupant in every crash scenario. Case Report The year-old Hispanic male sustained critical abdominal and thorax injuries in the frontal crash. Open in a separate window. Figure 1. Crash location and vehicle orientation postcrash scene Arizona police file. Figure 2. Second row cantilever seat pan design in the pickup involved in the crash original.

Figure 3. Figure 4. Table 1 AIS for the occupant. Table 2 Operative procedures conducted on the occupant. Discussion During impact, he moved forward at the initial vehicle speed due to inertia until acted upon by the lap and shoulder belt restraining force.

Figure 5. The actuation of the actuator was completed 20 to 30 ms after the impact. When the actuator was actuated, the vehicle occupant had barely started to be thrown forward to the sensor. The anti-slip retaining part or the rail 6 was in a part of the seat which is adjacent to the thighs of the vehicle occupant to mm in front of the hip. When the vehicle occupant's forward thrust began, the vehicle occupant's abdomen or pelvis was restrained relatively instantaneously, and the deformation of the restraining member absorbed some amount of the vehicle occupant's impact energy approximately 30 to 40 ms after the impact.

The subsequent forward movement of the vehicle occupant caused the seat belt tension to reach its maximum value or the pelvis to be completely restrained, and the pelvis drove the maximum acceleration value 40 to 50 ms after the impact. The maximum acceleration value at the head then occurred 50 to 60 ms after the impact. The vehicle seat device having the present invention, as explained above, is characterized in that the peak of the acceleration value exerted on the pelvis and the surrounding body parts occurs earlier than that which is exerted on the other body parts Fig.

In other words, the maximum load placed on the pelvis may increase slightly, but the maximum load placed on the chest and head is significantly reduced. Even when the generation of gas by the gas generator is ended and the driving force from the actuator 8 is no longer present, the one-way locking mechanism 7 prevents the raised rod 6 from coming down, and the process of preventing the slip-through phenomenon goes further.

The retention part was in the above-described embodiment form raised by a rotary movement, but it can can also be moved linearly upwards. The retention part is not limited to a rod part, and the load on the Vehicle occupants can be reduced even further, though it is made from a material that is capable of is to absorb energy materials like iron, alumi nium and plastic, parts such as belts and wire mesh, and Airbags designed for controlled energy absorption are by a throttle opening or another device used to control throughput.

From the above description it follows that according to a certain aspect of the present invention, the stel Oil actuator is operated to turn part of the seat cushion lift using a restraint and the belly or the pelvis and the neighboring body parts of the driving witness inmates are held back so that the pelvis and the neighboring body parts out of the maximum load are placed before the chest and the head of the maximum Are exposed to stress, so the stress that otherwise on the chest and the head, on others Body parts is distributed.

As a result, the maximum Strain on the critical parts of human Body as the chest and head is exercised redu be adorned and injuries to these parts of the body and that Slipping phenomena can be avoided at the same time.

It can also be done by lifting the thigh of the vehicle occupy the vehicle before impact from the front Part of the vehicle is exposed, protecting the knees and the legs of the vehicle occupant are improved. The present invention is based on preferred Embodiments of the same have been described relevant expert is clear, however, that various changes Changes and modifications are possible without the protective cover rich to leave the present invention by the appended claims is set.

Vehicle seat device with: a sensor for detecting an impact; a relatively passive occupant restraint; an active vehicle occupant restraint that is movable between a rest position and a deployed position; an actuator for moving the active restraint member from the rest position to the deployed position; a locking mechanism for retaining the active restraint substantially in the deployed position after the active restraint has been deployed; and a control unit for selectively actuating the actuator as a function of a detection result of the impact sensor; wherein the control unit is designed to actuate the actuator so timed that the pelvis of a vehicle occupant is exposed to a maximum value of the acceleration before it is the head or chest of the vehicle occupant.

Vehicle seat device according to claim 1, wherein the pas sive retaining part has a seat belt and the active restraining part to prevent slipping points, which is designed to have a front end of a To raise the seat.

Vehicle seat device according to claim 1, wherein the Stel Oil drive has a cylinder, one accommodated therein Piston and a propellant charge, which is accommodated in the cylinder is to quickly increase an internal pressure of the Cylinder, so that a thrust is generated that the piston will quickly push out of the cylinder.

Vehicle seat device for preventing a vehicle occupant driving in the event of an impact situation such. The vehicle seat device according to claim 4, wherein the stel Oil drive has a cylinder, one accommodated therein Piston and a propellant charge, which is accommodated in the cylinder is to quickly increase an internal pressure of the Cylinder, so that a thrust is generated that the piston will quickly push out of the cylinder.

Vehicle seat device with a device for preventing the so-called slip-through effect. Anti-submarine vehicle seat device for preventing vehicle occupant from slipping forward under seat belt during impact situation, has sensors that trigger actuators, causing deformation of seat squab to prevent sliding of seat occupant.

USB1 en. DEB4 en. FRB1 en. GBB en. Restraint system with device for preventing the divergence of a vehicle occupant. DEA1 en. Vehicle seat with a seat part and with a restraining device for preventing a passenger slipping, restraint device. Vehicle seat with a seat part and with a restraint device for preventing a passenger slippage, restraint device and manufacturing method.

A vehicle seat with a seat portion and a restraining device for preventing a passenger from slipping, restraint device and manufacturing method. Safety device for motor vehicle, has locking unit designed in enlargeable manner by drive device and coupled with guiding device e. USB2 en. USDS1 en. CAS en. AUB2 en. Tubular gas generator e. USA en. JPSY2 en. JPSA en.