Development of pre-crash safety system

Fujita, Koichi; Fujinami, Hiroaki; Moriizumi, Kiyotaka; Enomoto, Takaaki; Kachu, Ryotaro; Kato, Hideki

Affiliations

Abstract

A large number of means for active safety and passive safety have been studied for road traffic safety, and various safety systems have been commercialized. It has now become important to link active safety with passive safety to enhance overall safety. Therefore, a pre-crash safety system has been developed that helps to reduce crash injuries by determining the likelihood of a crash in advance, and activating active safety systems and passive safety systems at an earlier stage.

This paper describes the configuration, functions, and effects of this pre-crash safety system. The newly developed system consists of a pre-crash sensor, a pre-crash seat belt, and pre-crash brake assist. The pre-crash sensor is composed of a millimeter-wave radar that detects forward obstacles and a pre-crash safety computer that helps to determine in advance whether a crash is unavoidable, based on location, speed and course of an obstacle. The pre-crash seat belt, which employs a mechanism to retract the seat belt by a motor, helps to reduce crash injuries through earlier restraint of front occupants. The pre-crash brake assist helps to reduce the crash speed by quickly generating a large brake force in response to the driver’s brake pedal operation even when sudden braking is not being performed.

Cited By (5)

Year	Entry
2005	Pack R, Koopmann J, Yu H, Najm WG. Pre-crash sensing countermeasures and benefits. In: Proceedings of the 19th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 6-9, 2005; Washington, DC.
2009	Aoki H, Aga M, Miichi Y, Matsuo Y. Development of a safety impact estimation tool for advanced safety technologies. In: Proceedings of the 21st International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 15-18, 2009; Stuttgart, Germany.
2009	Kuroda K, Izumikawa I, Kouketsu O. Logical mediation structures for Toyota’s driver support systems. In: Proceedings of the 21st International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 15-18, 2009; Stuttgart, Germany.
2013	Lee JK, Lee KW. Study on effectiveness of pre-crash active seatbelt using real time controlled simulation. In: Proceedings of the 23rd International Technical Conference on the Enhanced Safety of Vehicles (ESV). May 27-30, 2013; Seoul, South Korea.
2013	Ito D, Ejima S, Sukegawa Y, Antona J, Ito H, Komeno F. Assessment of a pre-crash seatbelt technology in frontal impacts by using a new crash test sled system with controllable pre-impact braking. In: Proceedings of the 23rd International Technical Conference on the Enhanced Safety of Vehicles (ESV). May 27-30, 2013; Seoul, South Korea.