A door system for a vehicle includes a vehicle body structure and a first door structure. The first door structure includes a first door beam extending between a lower part and an upper part of the vehicle body structure when the first door structure is closed. The first door beam includes a first engaging part arranged to interact with an essentially correspondingly shaped first receiving guide rail when the first door structure is in the closed position. The first receiving guide rail extends in a lateral direction of the vehicle body structure, aligned with an extension of a first cross member extending in a lateral direction of the vehicle body structure. Upon a side collision, the first door beam is arranged to engage with the first cross member and the receiving guide rail is arranged to prevent the first engaging part from moving in a vertical direction.

A door structure system for a vehicle includes an inner panel, an outer panel, and an outer belt reinforcement member. The outer belt reinforcement member extends in a fore-and-aft direction of the door structure. The outer belt reinforcement member creates an overlap joint with a hem flange portion of the inner panel. The outer belt reinforcement member includes touch-down feature that extends toward the inner panel and into contact with a bearing surface of the inner panel that is stepped down relative to the hem flange portion. The overlap joint and the touch-down feature both contribute to an increased upper frame stiffness of the door structure and improve sealing performance between the door structure and the vehicle body structure.

A body structure including an A-pillar, a door assembly, an engine compartment assembly and an upper longitudinal beam of engine compartment, and also includes a reinforcement plate of upper longitudinal beam, a first anti-crash beam, and a second anti-crash beam. The front end of the reinforcement plate of upper longitudinal beam is connected to the middle portion of the upper longitudinal beam of engine compartment. The rear end of the reinforcement plate of upper longitudinal beam is connected to the engine compartment assembly. The upper longitudinal beam of engine compartment and the reinforcement plate of upper longitudinal beam form a first triangle area on the engine compartment assembly. The first anti-crash beam and the second anti-crash beam are installed on the door assembly along a direction from the front to the rear of the vehicle body. The first anti-crash beam is located above the second anti-crash beam.

A side door structure includes an inner panel, an outer panel, a drain hole, an impact absorbing member, and a fixing member. The inner panel covers a vehicle-widthwise outer side of a side sill. The outer panel faces the inner panel and constitutes a side door together with the inner panel. The drain hole is provided in a lower end part of the inner panel and formed to drain rainwater entering the inside of the side door. The impact absorbing member is disposed inside the side door and extends in a front-rear direction of a vehicle body. The fixing member fixes the impact absorbing member to the inner panel at a position higher than a position facing the side sill. The fixing member is set to have a fixing strength at which the impact absorbing member is releasable upon input of an impact load of a predetermined load or more.

A side impact restraint protection system for a vehicle includes first and second side safety structures and first and second structural elements of a vehicle body structure. The first and second side safety structures are respectively connected to a first side door and a second side door. The first and second side doors are arranged to cover a common single door opening of the vehicle body structure. The first structural element is in a position in front of the door opening and the second structural element is in a position behind the door opening in a longitudinal direction. In the closed door position, the first and second side safety structures are releasably connected to each other via a connecting device, and the first and second side safety structures are respectively connected to the first and second structural elements via a first connection member and a second connection member.

A safety release system releases a connection between a side safety structure and a connecting device of a side impact restraint protection system for a vehicle after an impact event. The side safety structure is connected to a side door, and the safety release system enables opening of the side door after the impact event, wherein the safety release system is arranged between the side safety structure and the connecting device. The connecting device releasably attaches the side safety structure to a side impact restraint protection system member connected to a vehicle body structure. The safety release system includes a releasing mechanism and a releasing member detachable from each other, and the safety release system has a first state where the releasing mechanism and the releasing member are connected to each other and a second state where the releasing mechanism and the releasing member are disconnected from each other.

A vehicle door beam is disclosed. The vehicle door beam includes: a beam body extending along a front-rear direction of the vehicle; and an inner side member disposed at a vehicle inner side of the beam body. The inner side member includes: a fixing part fixed to the beam body; and a non-fixing part not fixed to the beam body and being disposed at a position in front of the fixing part in the front-rear direction.

A vehicle door beam is disclosed. The vehicle door beam includes: a beam body extending along a front-rear direction of a vehicle; and a bracket joining the beam body to the vehicle door body. The bracket includes a rib formed continuously on an extension line of the bracket extending along the beam body, and the rib is continued to a position of an end of the bracket.