Reduction of particulate emissions from vehicle braking systems
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16D-065/00
F16D-065/12
F16D-069/00
출원번호
US-0533933
(2009-07-31)
등록번호
US-8893863
(2014-11-25)
발명자
/ 주소
Meckel, Nathan K.
출원인 / 주소
Tech M3, Inc.
대리인 / 주소
Mintz Levin Cohn Ferris Glovsky and Popeo, P.C.
인용정보
피인용 횟수 :
2인용 특허 :
19
초록▼
A vehicle braking system reduces particulate emissions resulting from wear of the brake pad and rotor during stopping or slowing of a vehicle. The rotor includes at least one friction surface, that has an outer coating of a corrosion and wear-resistant material. This outer coating can optionally inc
A vehicle braking system reduces particulate emissions resulting from wear of the brake pad and rotor during stopping or slowing of a vehicle. The rotor includes at least one friction surface, that has an outer coating of a corrosion and wear-resistant material. This outer coating can optionally include a first layer comprising a crystalline material and a second layer overlaying and contacting the first layer and comprising an amorphous material. The first layer and the second layer can optionally have an inter-layer period of less than 10 nm such that the structure of the outer coating is that of a superlattice. A brake member that includes a friction material is mounted to a caliper on the vehicle with the friction material disposed opposite the at least one friction surface so that the friction material reversibly engages with the outer coating of the corrosion and wear-resistant material when the braking system is operated to stop or slow the vehicle. Contact between the friction material and the outer coating results in substantially reduced conversion of the friction material to dust while producing an improved coefficient of friction relative to standard braking systems. Related systems, apparatus, methods, and/or articles are also described.
대표청구항▼
1. A braking system for reducing particulate emissions resulting from stopping or slowing a vehicle, comprising: a rotating braking element that comprises a bulk structural material and a friction surface, the friction surface comprising a coating that comprises a corrosion and wear-resistant materi
1. A braking system for reducing particulate emissions resulting from stopping or slowing a vehicle, comprising: a rotating braking element that comprises a bulk structural material and a friction surface, the friction surface comprising a coating that comprises a corrosion and wear-resistant material, the coating comprising a first layer comprising a crystalline material and a second layer overlaying and contacting the first layer and comprising an amorphous material, the rotating braking element further comprising a coarse surface geometry with jagged peaks and valleys under the coating, the friction surface comprising a plurality of raised island formations separated by channels or gaps that permit air flow to cool the rotating braking element during active engagement with the movable brake member; anda movable brake member that comprises a friction material having a friction material composition, the movable brake member being disposed with the friction material disposed opposite the friction surface of the rotating braking element so that the friction material reversibly engages with the coating of the corrosion and wear-resistant material when the braking system is operated to stop or slow the vehicle. 2. A braking system as in claim 1, wherein the first layer and the second layer have an inter-layer period of less than 10 nm and the coating comprises a superlattice structure. 3. A braking system as in claim 1, wherein the second layer comprises a binary metal. 4. A braking system as in claim 1, wherein the crystalline material of the first layer comprises at least one metal selected from titanium, chromium, zirconium, aluminum, hafnium and an alloy combination thereof. 5. A braking system as in claim 4, wherein the second layer further comprises one or more nitrides, borides, carbides or oxides of the metal of the first layer. 6. A braking system as in claim 1, wherein the rotating braking element comprises a brake disk or rotor. 7. A braking system as in claim 1, wherein active engagement of the brake member and the rotating brake element results in conversion of the friction material to dust at a coated loss rate that is approximately 10 to 30 times slower than an uncoated loss rate that results from active engagement of the brake member and the bulk structural material of the rotating braking element without the coating. 8. A braking system as in claim 1, wherein active engagement of the brake member and the rotating brake element results in the friction material having a coated useful lifetime that is approximately 10 to 30 times longer than an uncoated useful lifetime that results from active engagement of the brake member and the bulk structural material of the rotating braking element without the coating. 9. A braking system as in claim 1, wherein both the uncoated rotating braking element and rotating braking element are polished, the friction surface being the polished portion of the rotating braking element. 10. A braking system as in claim 1, wherein the coarse surface geometry with jagged peaks and valleys is imparted using irregular shaped particles. 11. A braking system as in claim 1, wherein contact between the friction material and the coating produces a coated coefficient of friction that is substantially equivalent to or greater than an uncoated coefficient of friction produced by contact between the friction material and the bulk structural material without the coating. 12. A braking system as in claim 1, wherein active engagement of the brake member and the rotating braking element according to a dynamometer test schedule results in conversion of the friction material to dust at a coated loss rate that is at least 30% slower than an uncoated loss rate that results from active engagement of the brake member and the bulk structural material of the rotating braking element without the coating according to the dynamometer test schedule. 13. A braking system as in claim 1, wherein the coarse surface geometry with jagged peaks and valleys is found only on the friction surface of the rotating braking element. 14. A braking system as in claim 3, wherein the binary metal of the second layer comprises at least one of a metal nitride, a metal boride, a metal carbide, and a metal oxide. 15. A method for reducing particulate emissions resulting from stopping or slowing a vehicle, the method comprising: moving a brake member that comprises a friction material having a friction material composition such that the friction material reversibly engages a rotating braking element that comprises a bulk structural material and a friction surface, the brake member being disposed in a vehicle braking system with the friction material disposed opposite the friction surface of the rotating braking element, the friction surface comprising a coating that comprises a corrosion and wear-resistant material, the coating comprising a first layer comprising a crystalline material and a second layer overlaying and contacting the first layer and comprising an amorphous material, the vehicle braking system comprising the brake member and the rotating braking element; andflowing air through channels or gaps between a plurality of raised island formations on the friction surface to cool the rotating braking element during active engagement with the brake member, the rotating braking element further comprising a coarse surface geometry with jagged peaks and valleys under the coating. 16. A method as in claim 15, wherein the crystalline material of the first layer of the coating comprises at least one metal selected from titanium, chromium, zirconium, aluminum, hafnium and an alloy combination thereof. 17. A method as in claim 16, wherein the second layer of the coating further comprises one or more nitrides, borides, carbides or oxides of the metal of the first layer. 18. A method as in claim 15, further comprising converting the friction material to dust at a coated loss rate that is approximately 10 to 30 times slower than an uncoated loss rate that results from active engagement of the brake member and the bulk structural material of the rotating braking element without the coating.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (19)
Miranti, Jr., Joseph P., Belt pulley and method of making the same.
Hauzer Franciscus J. M. (Venlo NLX) Munz Wolf-Dieter (Venlo NLX) Veltrop Hans (Venlo NLX) Wesemeyer ; deceased Harald (late of Hanger-Varnamo SEX) Wesemeyer ; heiress Beate (Kleinfischbach SEX), Method and apparatus for coating substrates.
Wong Ming-Show ; Li Dong ; Chung Yin-Wah ; Sproul William D. ; Chu Xi ; Barnett Scott A., Superhard composite materials including compounds of carbon and nitrogen deposited on metal and metal nitride carbide an.
Burkhard Kurt (Schaffhausen CHX) Kunzmann Peter (Flurlingen CHX), Wear resistant coating for the working face of disc-shape machine parts made of aluminum or aluminum alloys.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.