FMVSS 206 STANDARD PDF

Section Standard No. Scope and Purpose. This standard specifies requirements for vehicle door locks and door retention components, including latches, hinges, and other supporting means, to minimize the likelihood of occupants being ejected from a vehicle as a result of impact. This standard applies to passenger cars, multipurpose passenger vehicles , and trucks, and buses with a gross vehicle weight rating GVWR of 4, kg or less.

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Section Standard No. Scope and Purpose. This standard specifies requirements for vehicle door locks and door retention components, including latches, hinges, and other supporting means, to minimize the likelihood of occupants being ejected from a vehicle as a result of impact.

This standard applies to passenger cars, multipurpose passenger vehicles , and trucks, and buses with a gross vehicle weight rating GVWR of 4, kg or less. Auxiliary Door Latch is a latch equipped with a fully latched position, with or without a secondary latched position, and fitted to a door or door system equipped with a primary door latch system.

Auxiliary Door Latch System consists of door latches and strikers other than those associated with the primary door latch system. Back Door is a door or door system on the back end of a motor vehicle through which passengers can enter or depart the vehicle or cargo can be loaded or unloaded. Body Member is that portion of the hinge normally affixed to the body structure. Door Closure Warning System is a system that will activate a visual signal when a door latch system is not in its fully latched position and the vehicle ignition is activated.

Door Hinge System is one or more hinges used to support a door. Door Latch System consists of latches and strikers installed on a door system. Door Member is that portion of the hinge normally affixed to the door structure and constituting the swinging member. Door System is the door, latch , striker , hinges, sliding track combinations and other door retention components on a door and its surrounding doorframe.

The door system of a double door includes both doors. Double Door is a system of two doors where the front door or wing door opens first and connects to the rear door or bolted door, which opens second. Folding Door is a movable barrier, which will close off an entranceway to a bus , multipurpose passenger vehicle or truck , consisting of two or more hinge panels that swing, slide, or rotate; does not have a striker and latch assembly.

Fork-bolt is the part of the latch that engages and retains the striker when in a latched position. Fork-bolt Opening Direction is the direction opposite to that in which the striker enters the latch to engage the fork-bolt. Fully Latched Position is the coupling condition of the latch that retains the door in a completely closed position.

Hinge is a device system used to position the door relative to the body structure and control the path of the door swing for passenger ingress and egress. Hinge Pin is that portion of the hinge normally interconnecting the body and door members and establishing the swing axis. Latch is a device employed to maintain the door in a closed position relative to the vehicle body with provisions for deliberate release or operation.

Primary Door Latch System consists of a primary door latch s and a striker s. Secondary Latched Position refers to the coupling condition of the latch that retains the door in a partially closed position. Striker is a device with which the latch engages to maintain the door in the fully latched or secondary latched position. Trunk Lid is a movable body panel that provides access from outside the vehicle to a space wholly partitioned from the occupant compartment by a permanently attached partition or fixed or fold-down seat back.

The requirements apply to all side and back doors, that lead directly into a compartment that contains one or more seating accommodations and the associated door components, except for those on folding doors, roll-up doors, detachable doors, bus doors used only for emergency egress purposes and labeled accordingly and on bus doors to accommodate a permanently attached wheelchair lift system that when the device is in the retracted position, the lift platform retracts to a vertical orientation parallel to and in close proximity with the interior surface of the lift door and in that position, the platform completely covers the doorway opening, has fixed attachments to the vehicle and provides a barricade to the doorway.

Each hinged door system shall be equipped with at least one primary door latch system. Each manufacturer shall, upon request from the National Highway Traffic Safety Administration, provide information regarding such designation. Applicable only to back doors that open in a vertical direction.

Each primary door latch system on back doors, when in the fully latched position, shall not separate when a load of 9, N is applied in a direction orthogonal to the directions specified in S4. Each primary door latch system and auxiliary door latch system shall meet either the dynamic requirements specified in paragraphs a and b of S4. The combined resistance to the unlatching operation must assure that the door latch system , when properly assembled in the vehicle door, will remain latched when subjected to an inertial load of 30 g in the vehicle directions specified in paragraph a of this section or paragraph b of this section, as applicable, when calculated in accordance with S5.

The door closure warning system shall be located where it can be clearly seen by the driver. In passenger cars and multipurpose passenger vehicles , when the locking mechanism is engaged both the outside and inside door handles or other latch release controls shall be inoperative. Upon certification a manufacturer may not thereafter alter the designation of a primary latch.

Each door latch system certified as meeting the requirements of S4. Their combined resistance to the unlatching operation must assure that the door latch system , when properly assembled in the vehicle door, will remain latched when subjected to an inertia load of 30 g in the vehicle directions specified in paragraph a of this section, when calculated in accordance with S5.

Each back door equipped with an interior door handle or other interior latch release control , shall be equipped with at least one locking device that meets the requirements of S4. S5 Test Procedures. The test procedures for S4. Align the direction of engagement parallel to the linkage of the fixture. Mount the fixture with latch and striker in the fully latched position in the test machine so as to apply a load perpendicular to the face of the latch.

Record the maximum load achieved. Mount the fixture with latch and striker in the secondary position in the test machine so as to apply a load perpendicular to the face of the latch. Record maximum load achieved. Mount the fixture with latch and striker in the fully latched position in the test machine so to apply a load in the direction of latch opening. Mount the fixture with latch and striker in the secondary latched position in the test machine so as to apply a load in the direction of latch opening.

Mount the fixture with latch and striker in the fully latched position in the test machine so as to apply a load in the direction specified in S4. Record the maximum load required. The dynamic inertial force application is tested according to the setup specified in paragraph 1 or 2 of this section.

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