System for controlling drivetrain components to achieve fuel efficiency goals
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60K-041/04
F02D-041/14
출원번호
US-0080049
(2002-02-21)
발명자
/ 주소
Bellinger, Steven M.
출원인 / 주소
Cummins, Inc.
대리인 / 주소
Barnes & Thornburg
인용정보
피인용 횟수 :
57인용 특허 :
42
초록▼
A system for controlling a vehicle drivetrain in a fuel-efficient manner includes, in one embodiment, a control computer operable to determine a number of engine load/engine speed boundary conditions as functions of brake specific fuel consumption (BSFC) contours in relation to an engine output char
A system for controlling a vehicle drivetrain in a fuel-efficient manner includes, in one embodiment, a control computer operable to determine a number of engine load/engine speed boundary conditions as functions of brake specific fuel consumption (BSFC) contours in relation to an engine output characteristics map and define therefrom an undesirable engine operation region U. As long as the engine is engaged with at least one of the gear ratios of the vehicle transmission, the control computer is operable to maintain or encourage engine operation outside of the region U. In another embodiment, the control computer is operable to define a contour from substantially zero engine load to substantially full engine load, wherein the contour preferably corresponds to a fuel-efficient path from no-load to full-load engine operating conditions. With change gear transmissions, the control computer is operable to control transmission shift points about the contour. With continuous variable transmissions, the control computer is operable to modify the effective gear ratio thereof to maintain engine operation on or about the contour. In either case, fuel efficient operation may be optimized.
대표청구항▼
A system for controlling a vehicle drivetrain in a fuel-efficient manner includes, in one embodiment, a control computer operable to determine a number of engine load/engine speed boundary conditions as functions of brake specific fuel consumption (BSFC) contours in relation to an engine output char
A system for controlling a vehicle drivetrain in a fuel-efficient manner includes, in one embodiment, a control computer operable to determine a number of engine load/engine speed boundary conditions as functions of brake specific fuel consumption (BSFC) contours in relation to an engine output characteristics map and define therefrom an undesirable engine operation region U. As long as the engine is engaged with at least one of the gear ratios of the vehicle transmission, the control computer is operable to maintain or encourage engine operation outside of the region U. In another embodiment, the control computer is operable to define a contour from substantially zero engine load to substantially full engine load, wherein the contour preferably corresponds to a fuel-efficient path from no-load to full-load engine operating conditions. With change gear transmissions, the control computer is operable to control transmission shift points about the contour. With continuous variable transmissions, the control computer is operable to modify the effective gear ratio thereof to maintain engine operation on or about the contour. In either case, fuel efficient operation may be optimized. et degree. 2. A running control apparatus according to claim 1, wherein the control system determines whether the object detected in the preset area is the preceding vehicle. 3. A running control apparatus according to claim 2, wherein the control system determines that the object detected in the preset area is the preceeding vehicle by: determining whether the object detected in the preset area is in a moving state or a stationary state, and determining whether the object is at least one of a vehicle running on an opposite lane and a vehicle passing an intersection. 4. A running control apparatus according to claim 3, wherein the control system determines that the detected object is a vehicle when the detected object has a size larger than a preset size, and determines that the detected object is not the vehicle when the detected object has a size smaller than the preset size. 5. A running control apparatus according to claim 2, wherein the control system determines that the detected object is a vehicle when the detected object has a size larger than a preset size, and determines that the detected object is not the vehicle when the detected object has a size smaller than the preset size. 6. A running control apparatus according to claim 1, further comprising an object detector which detects an object in the preset area in front of the vehicle. 7. A running control apparatus according to claim 6, further comprising an actual deceleration detector which detects an actual deceleration of the vehicle, wherein the braking system actuates the brake if a deceleration deviation-related amount is equal to or greater than a preset deviation-related amount, the deceleration deviation-related amount being related to a value obtained by subtracting the detected actual deceleration from a target deceleration determined based on a desired relative positional relationship and an actual relative positional relationship detected by the object detector. 8. A running control apparatus that controls a running state of a vehicle based on a relative postional relationship between the vehicle and a preceding vehicle running ahead of the vehicle in a preset area, comprising: a control system that determines a probability that an object detected in the preset area is in a same lane as the vehicle; and a braking system which actuates a brake that retards rotation of a wheel of the vehicle when the relative positional relationship between the vehicle and the preceding vehicle indicates that the vehicle should be decelerated, wherein the relative positional relationship between the vehicle and the preceding vehicle indicating that the vehicle should be decelerated includes a state in which the determined probability is equal to or greater than a preset probability, wherein if the relative positional relationship indicates that the vehicle should be decelerated, the braking system controls at least one of a driving device that supplies power to drive the vehicle and a power transmitting device that is disposed between the driving device and the wheel of the vehicle such that the vehicle is decelerated, prior to actuation of the brake. 9. A running control apparatus according to claim 8, wherein the braking system controls at least one of the driving device and the power transmitting device if the relative positional relationship meets a preset controlling condition, and the braking system actuautes the brake if the relative positional relationship meets a brake actuating condition. 10. A running control apparatus that controls a running state of a vehicle based on a relative positional relationship between the vehicle and a preceding vehicle running ahead of the vehicle in a preset area, comprising: a control system that determines a probability that an object detected in the preset area is in a same lane as the vehicle; and a braking system which actuates a brake that retards rotation of a wheel of the vehicle when the relative position al relationship between the vehicle and the preceding vehicle indicates that the vehicle should be decelerated, wherein the relative positional relationship between the vehicle and the preceding vehicle indicating that the vehicle should be decelerated includes a state in which the determined probability is equal to or greater than a preset probability, further comprising: a brake controller which is included in the braking system, and which actuates the brake and controls a brake operation state; the control system permits or prohibits actuation of the brake based on at least one of a state of the brake controller and a running state of a vehicle, and an alarm which produces an alarm signal when actuation of the brake is prohibited by the control system. 11. A running control apparatus according to claim 10, wherein the braking system comprises a brake controller which controls an operation state of the brake, and the brake controller comprises a cruise control portion which controls an operation state of the brake in accordance with a necessity to decelerate the vehicle. 12. A running control apparatus according to claim 11, wherein the brake controller also comprises an antilock control portion which controls the brake such that in a case where the brake is in actuated state and where a value indicating a slip state of the wheel that is in a locked state is larger than a preset value even when a brake operating member is not operated by a vehicle operator, the slip state of the wheel is brought into an appropriate range. 13. A running control apparatus according to claim 10, wherein the braking system comprises a brake controller which controls an operation state of the brake, and the brake controller comprises an antilock control portion which controls the brake such that in a case where the brake is in an actuated state and where a value indicating a slip state of the wheel that is in a locked state is larger than a preset value even when a brake operating member is not operated by a vehicle operator, the slip state of the wheel is brought into an appropriate range. 14. A running control apparatus according to claim 10, wherein the control system includes a vehicle behavior control portion which controls at least one of the brake and the driving device, if a behavior of the vehicle is unstable as compared with a set state, such that the behavior of the vehicle is brought into an appropriate state. 15. A running control apparatus that controls a running state of a vehicle based on a relative positional relationship between the vehicle and a preceding vehicle running ahead of the vehicle in a preset area, comprising: a control command value determining controller which determines a control command value related to deceleration of the vehicle based on the relative positional relationship between the vehicle and the preceding vehicle; a brake controller which controls an operation state of a brake that retards rotation of a wheel of the vehicle in accordance with the control command value received from the control command value determining controller; and a control abnormality detector which detects a control abnormality based on logical consistency of contents of a plurality of pieces of information containing information transmitted between the control command value determining controller and the brake controller. 16. A running control apparatus according to claim 15, further comprising a controller which controls at least one of a driving device that supplies power to drive the vehicle and a power transmitting device disposed between the driving device and the wheel of the vehicle in response to the control command value transmitted from the control command value determining controller, wherein the control abnormality detector detects the control abnormality based on the plurality of pieces of the information containing information regarding communication among the control command value determining controller,
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이 특허에 인용된 특허 (42)
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Werner Jeffrey A. (San Jose CA) Watkins Daniel R. (Los Altos CA) Wong Jimmy S. (Cupertino CA) Chang Yen C. (Saratoga CA), Logic compiler for design of circuit models.
Kusaka Kohei (Tokyo JPX) Kaneko Kiyoshi (Kanagawa JPX) Kato Yoshiaki (Tokyo JPX) Kato Takeo (Kanagawa JPX), Method of automatically changing the speed stage of a construction vehicle based on vehicle loading.
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Haubner Georg (Berg/Oberpf DEX), Method of automatically controlling modulation pressure in an automatic transmission including addressing a stored engin.
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Funke, Steven J.; Bloms, Jason K.; Crowell, Thomas J.; Leman, Scott A.; Weber, James R.; Skorupski, Jeff; Genise, Tom; Nellums, Rich; Smedley, Daniel G.; Speranza, Donald, Efficiency based integrated power train control system.
Bates,Cary Lee; Crenshaw,Robert James; Day,Paul Reuben; Santosuosso,John Matthew, Method and system for controlling an automatic transmission using a GPS assist having a learn mode.
Bates,Cary Lee; Crenshaw,Robert James; Day,Paul Reuben; Santosuosso,John Matthew, Method and system for controlling an automatic transmission using a GPS assist having a learn mode.
Stewart,Gregory E.; Kolavennu,Soumitri N.; Borrelli,Francesco; Hampson,Gregory J.; Shahed,Syed M.; Samad,Tariq; Rhodes,Michael L., Multivariable control for an engine.
Stewart,Gregory E.; Kolavennu,Soumitri N.; Borrelli,Francesco; Hampson,Gregory J.; Shahed,Syed M.; Samad,Tariq; Rhodes,Michael L., Use of sensors in a state observer for a diesel engine.
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