[특허]Motor-driven power steering apparatus for automobiles

[미국특허] Motor-driven power steering apparatus for automobiles 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B62D-005/04
출원번호	US-0187340 (1994-01-25)
우선권정보	JP-0011799 (1993-01-27)
발명자 / 주소	Wada Shunichi (Himeji JPX) Nishino Kazuhisa (Himeji JPX)
출원인 / 주소	Mitsubishi Denki Kabushiki Kaisha (Tokyo JPX 03)
인용정보	피인용 횟수 : 33 인용 특허 : 0

초록 ▼

A motor-driven type power steering apparatus for assisting a driver in manipulating a steering wheel of a motor vehicle includes a steering-wheel return state decision circuit for deciding whether the steering wheel is in the state to be returned to a center position, a control quantity generating and selecting circuit for generating control quantities corresponding to respective driving modes on the basis of a control quantity of the electric motor and selecting one of the control quantities in dependence on the result of the decision made as to the return state of the steering wheel, and a conversion circuit for converting the control quantities into PWM duty ratios, respectively. In the normal steering operation, switching elements for energizing the motor are driven with the PWM duty ratio corresponding to a first driving mode, while upon return of the steering wheel to the center position, the switching elements are driven with the PWM duty ratio corresponding to a second driving mode. A smooth steering torque control is realized with the steering-wheel return characteristic being improved.

대표청구항 ▼

A motor-driven power steering apparatus for a motor vehicle, comprising: a torque sensor for detecting a steering torque of a steering wheel; a vehicle speed sensor for detecting a speed of said motor vehicle; an electric motor for assisting manipulation of said steering wheel; two pairs of switching elements connected in the form of a bridge circuit together with said electric motor for allowing said electric motor to rotate selectively in either one of forward and backward directions; motor current detecting means for detecting the current flowing through said electric motor; and a signal processing unit for driving said switching elements on the basis of said steering torque, said vehicle speed and said motor current; wherein said signal processing unit includes: steering wheel return decision means for deciding whether the steering wheel of said motor vehicle is in a return state in which said steering wheel is to be returned to a center position; target current value arithmetic means for arithmetically determining a target current value of said motor current on the basis of said steering torque and said vehicle speed; control quantity arithmetic means for arithmetically determining a control quantity for said electric motor in dependence on deviation of said motor current from said target current value; selecting means for generating first and second control quantities corresponding to first and second driving modes, respectively, on the basis of said control quantity and selecting one of said first and second control quantities in dependence on the return state of said steering wheel; conversion means for converting said first and second control quantities into first and second PWM duty ratios, respectively, for said switching elements; and a driving circuit for driving said switching elements on the basis of said first or second PWM duty ratio; wherein said selecting means generates said first control quantity corresponding to said first driving mode when said steering wheel is judged as not being in said return state while generating said second control quantity corresponding to said second driving mode when said steering wheel is judged as being in said return state; and wherein said driving circuit responds to said first PWM duty ratio to thereby hold constantly one switching element in each pair in conducting state while turning on and off the other switching element in each pair according to said first PWM duty ratio, while said driving circuit responds to said second PWM duty ratio by turning on and off simultaneously both of said switching elements in each pair according to said second PWM duty ratio.

이 특허를 인용한 특허 (33) 인용/피인용 타임라인 분석

William Henry Wittig, Automatic compensation for electric power steering hysteresis.
상세보기
Endo Shuji,JPX ; Itakura Yusuke,JPX ; Kobayashi Hideyuki,JPX, Control apparatus for electric power steering system.
상세보기
Nishino Kazuhisa (Kobe JPX) Awa Hirohisa (Kobe JPX), Control system for electrically operated power steering apparatus.
상세보기
Hironaka, Shinzi; Tsurumiya, Osamu; Kobayashi, Akio; Noro, Yoshiki; Mukai, Yoshinobu; Ohta, Susumu; Kurosawa, Takao, Current detecting apparatus and electric motor control apparatus.
상세보기
Matsuoka Hirofumi,JPX ; Noritou Yasuji,JPX ; Fukuda Ken,JPX, Electric power steering apparatus.
상세보기
Matsuoka Hirofumi,JPX ; Noritou Yasuji,JPX ; Fukuda Ken,JPX, Electric power steering apparatus.
상세보기
Nishimoto Mitsuhiko,JPX ; Yoshida Kazuyuki,JPX ; Igo Atsushi,JPX, Electric power steering apparatus.
상세보기
Yamawaki Shigeru,JPX ; Shimizu Yasuo,JPX, Electric power steering apparatus.
상세보기
Kobayashi, Hideyuki; Sakaguchi, Toru; Hara, Takeshi; Nejo, Sakae, Electric power steering device.
상세보기
Oshima,Hiroyasu; Imai,Katsuya, Electric vehicle steering/drive control method.
상세보기
Oshima, Hiroyasu; Baba, Kazuaki; Imai, Katsuya; Yamada, Akihiro, Electric vehicle steering/drive control method, electric vehicle steering/drive control apparatus, and electric vehicle.
상세보기
Shelton, IV, Frederick E.; Overmyer, Mark D.; Yates, David C.; Harris, Jason L., Mechanisms for compensating for drivetrain failure in powered surgical instruments.
상세보기
Kasagami, Fumio; Noda, Toshikazu, Method and device for servo-controlling DC motor.
상세보기
Nishino Kazuhisa (Hyogo-ken JPX) Awa Hirohisa (Hyogo-ken JPX) Wada Shunichi (Hyogo-ken JPX), Motor controller.
상세보기
Takatsuka Yuji,JPX ; Ohtagaki Shigeki,JPX, Motor driving apparatus.
상세보기
Shelton, IV, Frederick E.; Morgan, Jerome R.; Harris, Jason L.; Beckman, Andrew T.; Baxter, III, Chester O., Power adapter for a surgical instrument.
상세보기
Kaji Hiroaki,JPX ; Sakamaki Masahiko,JPX, Power steering apparatus.
상세보기
Kwon, Sung Gu, Servo control apparatus and method for controlling the same.
상세보기
Shelton, IV, Frederick E., Staple cartridges for forming staples having differing formed staple heights.
상세보기
Swayze, Jeffrey S.; Hueil, Joseph C.; Morgan, Jerome R.; Shelton, IV, Frederick E., Stapling assembly configured to produce different formed staple heights.
상세보기
Schmid, Katherine J.; Morgan, Jerome R.; Korvick, Donna L.; Shelton, IV, Frederick E., Stapling system comprising an adjunct and a flowable adhesive.
상세보기
Shelton, IV, Frederick E., Surgical cutting and fastening instrument.
상세보기
Shelton, IV, Frederick E.; Swayze, Jeffrey S.; Baxter, III, Chester O., Surgical fastening apparatus with a rotary end effector drive shaft for selective engagement with a motorized drive system.
상세보기
Yates, David C.; Huitema, Thomas W.; Shelton, IV, Frederick E., Surgical instrument comprising a control system.
상세보기
Overmyer, Mark D.; Auld, Michael D.; Adams, Shane R.; Shelton, IV, Frederick E.; Harris, Jason L., Surgical instrument comprising a lockable battery housing.
상세보기
Yates, David C.; Shelton, IV, Frederick E.; Giordano, James R., Surgical instrument system for evaluating tissue impedance.
상세보기
Hunter, Morgan R.; Schultz, Darwin L.; Worthington, Sarah A.; Shelton, IV, Frederick E.; Weaner, Lauren S.; Vendely, Michael J., Surgical instrument with articulating and axially translatable end effector.
상세보기
Hunter, Morgan R.; Schultz, Darwin L.; Dunki-Jacobs, Adam R.; Baxter, III, Chester O.; Swayze, Jeffrey S., Surgical instruments with tensioning arrangements for cable driven articulation systems.
상세보기
Overmyer, Mark D.; Yates, David C.; Shelton, IV, Frederick E.; Adams, Shane R.; Leimbach, Richard L., Surgical stapler having motor control based on an electrical parameter related to a motor current.
상세보기
Shelton, IV, Frederick E.; Setser, Michael E.; Weisenburgh, II, William B., Surgical stapling instrument with lockout features to prevent advancement of a firing assembly unless an unfired surgical staple cartridge is operably mounted in an end effector portion of the instrument.
상세보기
Shelton, IV, Frederick E.; Morgan, Jerome R., Surgical stapling instruments with rotatable staple deployment arrangements.
상세보기
Shelton, IV, Frederick E.; Harris, Jason L.; Yates, David C., System for controlling articulation forces.
상세보기
Nishino Kazuhisa,JPX ; Awa Hirohisa,JPX ; Wada Shunichi,JPX, Vehicle control apparatus.
상세보기

활용도 분석정보

상세보기

다운로드

내보내기

활용도 Top5 특허

해당 특허가 속한 카테고리에서 활용도가 높은 상위 5개 콘텐츠를 보여줍니다.
더보기 버튼을 클릭하시면 더 많은 관련자료를 살펴볼 수 있습니다.

IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

[미국특허] Motor-driven power steering apparatus for automobiles 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (33) 인용/피인용 타임라인 분석

활용도 분석정보

활용도 Top5 특허

관련 콘텐츠

특허 원문 보기

IPC 상위 출원인

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

연합인증

[미국특허] Motor-driven power steering apparatus for automobiles 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

전체(0) 논문(0) 특허(0) 보고서(0)

전체(0) 논문(0) 특허(0) 보고서(0)

이 특허를 인용한 특허 (33) 인용/피인용 타임라인 분석

활용도 분석정보

활용도 Top5 특허 더보기

관련 콘텐츠

특허 원문 보기

IPC 상위 출원인

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

활용도 Top5 특허