What are the activation conditions for Lexus automatic braking?
3 Answers
When the vehicle speed reaches 30km/h, the active braking system will automatically activate. The active braking system monitors traffic conditions through the optical radar system on the front windshield, especially the situation within 6 meters in front of the vehicle. When the vehicle ahead brakes, stops, or encounters other obstacles, the system will first automatically apply additional force to the braking system to help the driver shorten the braking distance before taking action. More relevant information is as follows: 1. Emergency braking state: Active braking works in emergency braking situations. Active braking is developed based on ABS, which is the Brake Assist System (BAS). It determines whether to enter an emergency braking state by monitoring the force and speed at which the driver presses the brake pedal. 2. BAS judgment: If BAS determines that it needs to enter an emergency braking state, the system will increase braking force to achieve the purpose of reducing braking distance. In other words, the automatic braking system in its initial stage requires the driver to detect an emergency and press the brake pedal to activate brake assist, otherwise it will not function.
I often drive a Lexus, and the automatic braking function is mainly activated when the vehicle's front sensors detect a potential collision risk. This system is part of the Lexus Safety System+ and works in combination with cameras and radar. For example, when the speed is between 30 to 150 kilometers per hour, if there is a sudden brake from the vehicle ahead or a pedestrian suddenly crossing, the system will intervene if it predicts a high probability of collision, first issuing a warning sound or dashboard alert. If the driver does not respond, it will automatically brake to reduce speed. In rainy, foggy weather, or dark environments, the sensors may be affected, reducing sensitivity, so it's important to regularly check if the sensors are clean and maintain good visibility. If the system is triggered, I recommend pulling over immediately to ensure safety. This feature is particularly useful in urban traffic congestion and long-distance highway driving, preventing many rear-end collisions. In short, keeping the vehicle's systems updated and well-maintained is key.
In my driving experience, the precondition for Lexus automatic braking is quite intuitive—it requires detecting an obstacle ahead and the risk level reaching a set threshold, such as close distance and significant speed difference. This system operates around the clock but performs differently in various scenarios. For example, it effectively prevents scratches when reversing in low-speed parking situations, but it automatically intervenes during high-speed overtaking if the vehicle ahead decelerates too quickly. I noticed that the system allows sensitivity adjustment through the steering wheel buttons, with high, medium, and low settings to regulate the triggering frequency. Once, in congested traffic with the automatic function enabled, it suddenly activated when closely following the car ahead, preventing a collision and proving its quick response. A reminder for users: the activation conditions require the engine to be on, the safety system in an active state, and the sensors functioning properly; otherwise, it may malfunction. Regular maintenance is crucial.
