JPS6490853A - Brake distance indicator - Google Patents

Brake distance indicator

Info

Publication number
JPS6490853A
JPS6490853A JP24787587A JP24787587A JPS6490853A JP S6490853 A JPS6490853 A JP S6490853A JP 24787587 A JP24787587 A JP 24787587A JP 24787587 A JP24787587 A JP 24787587A JP S6490853 A JPS6490853 A JP S6490853A
Authority
JP
Japan
Prior art keywords
slip rate
driving
torque
speed
indicator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP24787587A
Other languages
Japanese (ja)
Inventor
Yuji Maeda
Shigeru Horikoshi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP24787587A priority Critical patent/JPS6490853A/en
Publication of JPS6490853A publication Critical patent/JPS6490853A/en
Pending legal-status Critical Current

Links

Landscapes

  • Regulating Braking Force (AREA)

Abstract

PURPOSE:To avoid collision upon emergency braking and to enable safe driving by operating a slip rate based on a wheel speed of driving wheels and a body speed then operating a body brake distance based on the slip rate and indicating the operation result on an indicator. CONSTITUTION:An optical or a radar doppler type body speed sensor 3 is fixed to the body 15 of an automobile and a wheel speed sensor 5 is fixed to a driving wheel 4. Furthermore, a torque detector 21 is provided and an output signal therefrom is fed together with output signals from the sensors 3, 5 to an arithmetic unit 1. The arithmetic unit 1 operates a slip rate based on the body speed signal and the wheel speed signal then estimates a drive torque T based on an output signal from the torque detector 21, thereafter estimates friction coefficient between the surface of road and tyre based on the slip rate and the driving torque. Then a brake distance is operated based on brake force or decelerating speed which are operated based on the friction coefficient or the driving torque, and indicated on an indicator 2.
JP24787587A 1987-10-02 1987-10-02 Brake distance indicator Pending JPS6490853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24787587A JPS6490853A (en) 1987-10-02 1987-10-02 Brake distance indicator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24787587A JPS6490853A (en) 1987-10-02 1987-10-02 Brake distance indicator

Publications (1)

Publication Number Publication Date
JPS6490853A true JPS6490853A (en) 1989-04-07

Family

ID=17169913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24787587A Pending JPS6490853A (en) 1987-10-02 1987-10-02 Brake distance indicator

Country Status (1)

Country Link
JP (1) JPS6490853A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06300765A (en) * 1993-01-27 1994-10-28 Motohiro Okada Speedometer for automobile of type displaying value corresponding to dry road
JPH07214U (en) * 1993-06-07 1995-01-06 有限会社平成測地 Electric rice cooker
US6445337B1 (en) * 1998-12-29 2002-09-03 Valeo Schalter Und Sensoren Gmbh Method for measuring the speed of a vehicle
GB2454594A (en) * 2007-11-09 2009-05-13 Hitachi Ltd Vehicle Speed Detection Apparatus
JP2011515665A (en) * 2008-03-13 2011-05-19 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Sensor system, vehicle control system and driver information system for vehicle safety
JP2015501123A (en) * 2011-12-05 2015-01-08 ルノー エス．ア．エス． Estimating recovered energy

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06300765A (en) * 1993-01-27 1994-10-28 Motohiro Okada Speedometer for automobile of type displaying value corresponding to dry road
JPH07214U (en) * 1993-06-07 1995-01-06 有限会社平成測地 Electric rice cooker
US6445337B1 (en) * 1998-12-29 2002-09-03 Valeo Schalter Und Sensoren Gmbh Method for measuring the speed of a vehicle
GB2454594A (en) * 2007-11-09 2009-05-13 Hitachi Ltd Vehicle Speed Detection Apparatus
GB2454594B (en) * 2007-11-09 2010-05-19 Hitachi Ltd Vehicle speed detection apparatus
JP2011515665A (en) * 2008-03-13 2011-05-19 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Sensor system, vehicle control system and driver information system for vehicle safety
JP2015501123A (en) * 2011-12-05 2015-01-08 ルノー エス．ア．エス． Estimating recovered energy

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