Buttoned-up engineering, unbuttoned.
BRZ Limited shown
TRIBECA DRIVERS BACK UP WITH GREATER CONFIDENCE WITH THE HELP OF THE OPTIONAL SUBARU REVERSE ASSIST ACCESSORY.
The Tribeca reverse assist sensors system uses beeping sounds to alert the driver to obstacles when backing up or parallel parking. The system includes four sensors mounted in the rear bumper fascia, an interior speaker, wiring harness, control module, and attachment hardware.
HOW IT WORKS
Todd Hill, a Subaru of America, Inc. accessories parts project engineer, provided some insight into how the system operates: “The system sends out high-frequency sound and listens for an echo, somewhat like radar. The time difference between emission and detection of the reflected signal allows the system to compute the distance to the obstacle.
“What are the easiest things to detect? Backing up against a flat wall or other large, flat object that is perpendicular to the vehicle. When you’re backing up against a flat wall at an angle or an object of unusual shape, some signals will bounce off, like a light ray will bounce off a mirror, rather than be reflected back towards the vehicle.
“If you’re backing up against a flat wall,” said Hill, “the system will pick it up right away. When you have something that’s much harder to detect, you might have to reach Zone 2 or 3 before the system picks it up. An object’s shape and size determine when the system first detects it.
“Shapes and materials are very important factors. For instance, the B-2 stealth bomber is really big, but it doesn’t show up on radar. With the Subaru system, a round pole may be harder to detect than a square pole. Most objects that are reasonably large will be picked up.
“We located the sensors below the bumper beams for a couple reasons: We wanted them out of the way, should someone bump into the vehicle, and we didn’t want to modify the bumper beam or its foam covering in any way. Subaru is very serious about maintaining the highest level of safety.”
“We think our system maximizes what you could expect a reverse assist to do.”
“Also, any time something is obstructing the sensors, their performance is affected. The sensors should be kept free of mud, dirt, ice, snow, or other obstructions.”
EXPAND VISION TO THE REAR OF THE VEHICLE
Right now, only the Tribeca has the reverse assist sensors feature available as an accessory. It can be installed any time, even after vehicle delivery. Subaru is expected to offer the accessory in other vehicles in the future.