Motor vehicles having bumper counter rotation brackets

An impact energy dissipation system for a vehicle structure having a first side member comprising a first lower dart and a first upper dart, the first upper dart is positioned between the first lower dart and an end portion of the first side member, a second side member parallel with and spaced apart from the first side member, the second side member comprising a second lower dart and a second upper dart, the second upper dart is positioned between the second lower dart and an end portion of the second side member, the lower darts and the upper darts form a preferential buckling zone of the first and the second side members, the impact energy dissipation system comprising:

• a first bumper bracket and a second bumper bracket coupling the impact energy dissipation system to the vehicle structure;
• a first gusset coupled to the first side member and the first bumper bracket;
• a second gusset coupled to the second side member and the second bumper bracket;
• a bumper reinforcement member coupled to the first and second bumper brackets and having a bumper height;
• and
• a counter rotation bracket coupled to and extending upwards from the bumper reinforcement member, the counter rotation bracket having a bracket height,
• wherein:
• the bracket height is at least approximately 50% of the bumper height;
• the first gusset is positioned between the first upper dart and the end portion of the first side member;
• and
• the second gusset is positioned between the second upper dart and the end portion of the second side member.

A motor vehicle comprising:

• a first side member comprising a first lower dart and a first upper dart, wherein the first upper dart is positioned rearward of the first lower dart;
• a second side member parallel with and spaced apart from the first side member, the second side member comprising a second lower dart and a second upper dart, wherein the second upper dart is positioned rearward of the second lower dart;
• a first bumper bracket coupled to an end portion of the first side member;
• a second bumper bracket coupled to an end portion of the second side member;
• a first gusset coupled to the first side member and the first bumper bracket, the first gusset positioned rearward of the first upper dart;
• a second gusset coupled to the second side member and the second bumper bracket, the second gusset positioned rearward of the second upper dart;
• and
• a bumper reinforcement member coupled to the first and second bumper brackets;
• and
• a counter rotation bracket coupled to the bumper reinforcement member and extending upwards from the bumper reinforcement member having a bracket height at least approximately 50% of a bumper height of the bumper reinforcement member;
• wherein the lower darts and the upper darts form a preferential buckling zone of the first and the second side members.