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Reduced stopping distance: development of active emergency braking assist for Electro Hydraulic Brake system
2003 (Engelska)Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
Abstract [en]

In recent years many of the different traditional mechanical and/or hydraulic automotive systems have been replaced or complemented with systems integrated with more or less advanced electronic control units, so called mechatronic systems. Now the time has come for the mechatronic successor of the hydraulic power brake system and the first step in the development towards Drive-by-Wire: the Electro Hydraulic Brake (EHB) system. This system has no mechanical or hydraulic connections between brake pedal and brake calipers. Sensors and an electronic control system instead control the brake pressure delivered to each caliper. This feature adds another dimensions to the control possibilities of the vehicle brake system and enables adding a wide range of new comfort and safety functions. The traditional method of working with reduction of stopping distance has been to reduce the actual braking distance by maximizing the deceleration when the driver steps on the brake. However, with the introduction of more advanced control systems it has become possible to attack the problem from a different angle. The means of this thesis have been to find methods to reduce the reaction time of the driver and the response time of the brake system. There are several meters to cut off the stopping distance since a car at 100 km/h travels 28 meters in one second. With the help of previous braking behavior and brake system studies together with additional tests and tryouts an additional active emergency braking assist function for the EHB system has been developed. The function identifies the driver’s intentions by monitoring the use of the pedals. If an emergency braking situation is identified the function helps the driver to make the stopping process as short as possible.

Ort, förlag, år, upplaga, sidor
2003.
Nyckelord [en]
Technology, Brakes, Emergency Braking, bromsar
Nyckelord [sv]
Teknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-49778ISRN: LTU-EX--03/070--SELokalt ID: 7175ea2a-01fb-4111-8f60-8bf6ec98f156OAI: oai:DiVA.org:ltu-49778DiVA, id: diva2:1023126
Ämne / kurs
Examensarbete, minst 30 hp
Utbildningsprogram
Civilingenjör, Maskinteknik
Examinatorer
Anmärkning
Validerat; 20101217 (root)Tillgänglig från: 2016-10-04 Skapad: 2016-10-04Bibliografiskt granskad

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