Adaptive Cruise Control System

The Adaptive Cruise Control (ACC) System monitors the distance between your vehicle and the vehicles ahead, and regulates your speed. The ACC system decelerates your vehicle when necessary to maintain a safe distance between vehicles. When the way is clear, the ACC system resumes cruising speed.

DENSO developed products for the ACC system including:

• Laser radar or millimeter-wave radar detects and calculates the position of an object ahead.
• Vehicle distance electronic control unit (ECU) determines if the object is a vehicle and calculates your vehicle’s target acceleration.
• Engine ECU controls the vehicle speed based on the target acceleration.

DENSO’s products are used in ACC systems, including the system that regulates vehicle speed even at rates from zero to 30 km/hr.

In 2003, DENSO introduced the ACC system and the pre-crash safety system which use the same millimeter-wave radar and ECU (called vehicle distance ECU for the ACC system and pre-crash ECU for the pre-crash safety system).

Benefits and Features

• Long-life laser radar uses a newly developed longer lasting laser diode.
• Precise discrimination between moving vehicles and stationary objects such as signs, using two-dimensional laser scanning.
• High-resolution detection of vehicle distance using a newly developed time measurement circuit.
• Precise monitoring of the road and cruising conditions and smooth speed control using various sensor data.
• DENSO’s small, light-weight millimeter-wave radar can detect obstacles over a horizontal plane with the world’s widest angle, 20 degrees, and excellent detection accuracy of 0.5 degrees.
  

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