GB2529653A - Cruise control - Google Patents

Cruise control Download PDF

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Publication number
GB2529653A
GB2529653A GB1415192.2A GB201415192A GB2529653A GB 2529653 A GB2529653 A GB 2529653A GB 201415192 A GB201415192 A GB 201415192A GB 2529653 A GB2529653 A GB 2529653A
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United Kingdom
Prior art keywords
vehicle
speed
cruise control
engine
vehicle speed
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.)
Withdrawn
Application number
GB1415192.2A
Other versions
GB201415192D0 (en
Inventor
Garon Heslop
Daniel David Smith
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.)
Delphi International Operations Luxembourg SARL
Original Assignee
Delphi International Operations Luxembourg SARL
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 Delphi International Operations Luxembourg SARL filed Critical Delphi International Operations Luxembourg SARL
Priority to GB1415192.2A priority Critical patent/GB2529653A/en
Publication of GB201415192D0 publication Critical patent/GB201415192D0/en
Publication of GB2529653A publication Critical patent/GB2529653A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/14—Adaptive cruise control
    • B60W30/143—Speed control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K31/00—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K31/00—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator
    • B60K31/02—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically
    • B60K31/04—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means
    • B60K31/042—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means where at least one electrical quantity is set by the vehicle operator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/14—Adaptive cruise control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/08—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to drivers or passengers
    • B60W40/09—Driving style or behaviour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2300/00—Indexing codes relating to the type of vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/02—Clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0638—Engine speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0638—Engine speed
    • B60W2510/0642—Idle condition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0657—Engine torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/10—Change speed gearings
    • B60W2510/1005—Transmission ratio engaged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/18—Braking system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/12—Lateral speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/28—Wheel speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/12—Brake pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/14—Clutch pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2720/00—Output or target parameters relating to overall vehicle dynamics
    • B60W2720/10—Longitudinal speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2720/00—Output or target parameters relating to overall vehicle dynamics
    • B60W2720/28—Wheel speed

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Controls For Constant Speed Travelling (AREA)

Abstract

Cruise control method monitors vehicle speed for a time period (e.g. monitors wheel speed / engine speed) and implements cruise control if detected vehicle speed is constant / uniform within predetermined limits, for a predetermined time period. The predetermined speed and time period can be variable, and may depend on engine conditions, running conditions, vehicle type, or driver preferences. Cruise control activation may depend on pre-requisite conditions including non-activation of clutch / brake, engine not at idle, engine speed / torque within certain range, vehicle speed above pre-set value, accelerator pedal displaced above pre-set value, or vehicle being in specific forward gears. Cruise speed may be adjusted by movement of accelerator pedal, though small movement may be ignored, and very large movement may deactivate cruise control. Cruise control implementation may be automatic.

Description

Cruise Control
Field of the Invention
This disclosure relates to a method of cruise control. It has particular application to any vehicle.
Background of the Invention
Cruise control is known where a driver, e.g. via a lever, can activate cruise contrcil so that e.g. the vehicle will continue at a certain speed irrespective of the accelerator pedal activation/position.
Thus the typical cruise control interface that the driver has available, usually involves an actual hardware lever with positions or buttons mounted on the steering wheel, These are used by the driver to turn on and adjust the target vehicle speed. The cruise control target speed is achieved by the engine control unit controlling the associated torque producing device, and therefore the tractive force at the wheels. A downside with this prior art, is the cost involved with fitting the hardware switch pack and associated wiring interfaces.
Indian patent application 1N2001DEL2189 discloses a method for implementing cruise control without the associated costs outlined above. In this system the movement of the accelerator pedal is determined, and if it has not moved within a narrow range for a set time, cruise control is implemented.
A problem with this system is that when encountering varying gradients, even to maintain a certain speed the driver must vary the accelerator pedal. Thus the above disclosure cannot be used, It is an object of the invention to overcome such problems, It is also an object to provide an alternative method for turning on cruise control without such hardware being fitted., The invention is applicable across a range of engine types,
Statement of the Invention
In one aspect is provided a method of cruise control for a vehicle comprising monitoring the vehicle speed overtime, and implementing cruise control if the speed of the vehicle does not vary more than a predetermined amount over a predetermined period of time.
The said predetermined amount of vehicle speed and/or said predetermined period of time may be variable.
The said predetermined amount of vehicle speed and/or said predetermined period of time may depend on one or more of the following: engine conditions running conditions, vehicle type, driver preferences.
The method may be implemented only if one or more of the following pre-requisite conditions are met: the clutch or brake is not active the engine is out of idle control the engine speed and/torque are within a certain range, the vehicle speed is above a certain pre-set value; accelerator pedal displacement is higher than above a certain pre-set value; or the vehicle is specific forward gears.
In another aspect is provided a vehicle adapted to implement cruise control adapted to monitor the vehicle speed over time, and to implement cruise control if the speed of the vehicle does not vary more than a predetermined amount over a predetermined period of time.
The predetermined amount of vehicle speed and/or said predetermined period of time are variable.
The said predetermined amount of vehicle speed and/or said predetermined period of time may depend on one or more of the following: engine conditions running conditions, vehicle type, driver preferences.
The may be adapted to implement said cruise control only if one or more of the following pre-requisite conditions are met: the clutch or brake is not active the engine is out of idle control the engine speed and/torque are within a certain range, the vehicle speed is above a certain pre-set value; accelerator pedal displacement is higher than above a certain pre-set value; or the vehicle is specific forward gears.
Brief Description of the Drawings
Figure 1 shows pre-requisite conditions where cruise control may be implemented according to
one example;
Figure 2 shows implementation of cruise control according to one example.
Detailed Description of Examples
Preferably there are further conditions that need to be present for cruise control to enable itself, some of which are common with a system fitted with a cruise lever or buttons. For example, cruise may only be enabled in some forward gears, However there may be other conditions that compensate for the lack of hardware.
Tn a basic example the vehicle speed is monitored. This can be measured from e.g. the speedometer, or possibly engine speed (rpm). Over a pre-determined time, if the vehicle speed remains within pre-set limits i.e. does not vary by more than a set amount, the cruise control is implemented.
The vehicle may be set into a semi-cruise control state to allow such functionality, and thus if the speed remain within certain level over a period of time the cruise control is set active. When in active state the current vehicle speed may be used as the set point and set by or registered by the vehicle ECU.
The actual vehicle speed is maintained e.g. according to the speed set point by the control unit of the vehicle, until the cruise control is reset to a passive state or deactivated again and subsequently enabling normal actuation of the accelerator pedal by the driver.
The predetermined time window may be varied. Also the speed range (limits) associated with the time window to implement methodology may be varied It would be clear to the skilled person that the time window and speed variation limits may be set appropriately, or varied, according to engine conditions running conditions, vehicle type, driver preferences etc. After cruise control is activated and the cruise speed target set using the vehicle speed, subsequent adjustments to the cruise speed target will be possible by adjustment of the accelerator pedal. it is anticipated that small variations in accelerator pedal position will be ignored leaving the vehicle speed set point unchanged. Modest changes of pedal up or down would be appropriately assessed to result in adjustment of the vehicle speed set point Larger variations in pedal would be used to deactivate cruise control and reset it back into a passive state.
In preferred embodiments the cruise control is implemented only under certain conditions, and there may be restrictions on when cruise control is activated. Figure 1 illustrates this. This shows a plot of engine speed and engine load and indicates in the hatched area those conditions where cruise control may be implemented. There may be (other) pre-requisites also fbr cruise control such as the vehicle speed being above a certain (e.g. calibrated or pre-set value) value.
Clutch/brake not being active, the vehicle speed being generally level speed (within a pre-set narrow variation) over a period of time, engine being out of idle control and the accelerator pedal being displace above a certain level.
Figure 2 shows the time line in illustrating advanced embodiments. The bottom plot (d) shows the vehicle speed with time. The cruise control is set to OFF initially (see plot b). As can be seen from the bottom plot, if the speed remains within a certain range for a certain time the cruise control will be set to ON (see plot b). Once in cruise control the accelerator pedal displacement (PV) (see plot c) may be measured. if the displacement does not vary within limits the cruise control is remains set at the set velocity (plot a). If the gradient dv/dt (e.g. of the road) lies between two fixed values Cxx and Cyy the vehicle speed set point of the cruise control is varied e.g. by increasing the speed dependent on the rate of change. If the gradient varies by more than a set amount e.g. Cyy then the system exits cruise control -see plot a.
The invention activates cruise control automatically without the driver requesting this to occur.
The benefits of cruise being active are that fuel consumption and associated emissions can be decreased, without requiring the most skilled of drivers to be employed. Looking for steady vehicle speed conditions rather than acc&erator pedal position to activate cruise control provides better control.

Claims (8)

  1. Claims 1. A method of cruise control for a vehicle comprising monitoring the vehicle speed over time, and implementing cruise control if the speed of the vehicle does not vary more than a predetermined amount over a predetermined period of time.
  2. 2. A method as claimed in claim 1 wherein said predetermined amount of vehicle speed and/or said predetermined period of time are variable.
  3. 3. A method as claimed in claim 2 wherein said predetermined amount of vehicle speed and/or said predetermined period of time depends on one or more of the following: engine conditions running conditions, vehicle type, driver preferences.
  4. 4, A method as claimed in any preceding claim wherein said method is implemented only if one or more of the following pre-requisite conditions are met: the clutch or brake is not active the engine is out of idle control the engine speed and/torque are within a certain range, the vehicle speed is above a certain pre-set value; accelerator pedal displacement is higher than above a certain pre-set value; or the vehicle is specific forward gears.
  5. 5. A vehicle adapted to implement cruise control adapted to monitor the vehicle speed over time, and to implement cruise control if the speed of the vehicle does not vary more than a predetermined amount over a predetermined period of time.
  6. 6. A vehicle as method as claimed in claim 5 wherein said predetermined amount of vehicle speed and/or said predetermined period of time are variable.
  7. 7. A vehicle method as claimed in claim 6 wherein said predetermined amount of vehicle speed and/or said predetermined period of time depends on one or more of the following: engine conditions running conditions, vehicle type, driver preferences.
  8. 8. A vehicle as claimed in any preceding claim wherein adapted to implement said cruise control only if one or more of the following pre-requisite conditions are met: the clutch or brake is not active the engine is out of idle control the engine speed and/torque are within a certain range, the vehicle speed is above a certain pre-set value; accelerator pedal displacement is higher than above a certain pre-set value; or the vehicle is specific forward gears.
GB1415192.2A 2014-08-28 2014-08-28 Cruise control Withdrawn GB2529653A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108791304A (en) * 2018-06-11 2018-11-13 浙江国自机器人技术有限公司 A kind of double acceleration control method, system and relevant apparatus driven
CN108791305A (en) * 2018-06-11 2018-11-13 浙江国自机器人技术有限公司 A kind of double drive acceleration change curvature synchronous method, system and a relevant apparatus
CN109835335A (en) * 2017-11-28 2019-06-04 蔚来汽车有限公司 Electric vehicle cruise control method and system and vehicle, controller and storage medium
EP3647142A1 (en) * 2018-10-31 2020-05-06 Robert Bosch GmbH Method and apparatus for controlling cruise control

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112109724B (en) * 2020-06-30 2022-07-29 上汽通用五菱汽车股份有限公司 Adaptive cruise control system activation method, vehicle, and readable storage medium

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Publication number Priority date Publication date Assignee Title
US5005133A (en) * 1987-01-12 1991-04-02 Nissan Motor Company, Limited System and method for automatically controlling a vehicle speed to a desired cruising speed
KR930007604A (en) * 1991-10-18 1993-05-20 강용 Stone cutting machine
US5508925A (en) * 1992-01-29 1996-04-16 Mitsubishi Denki Kabushiki Kaisha Constant speed running device
JPH11348600A (en) * 1998-06-12 1999-12-21 Honda Motor Co Ltd Driving force control device for vehicle
DE102006012514A1 (en) * 2006-03-18 2007-09-20 Bayerische Motoren Werke Ag Motor vehicle, has control unit controlling drive unit such that vehicle speed is maintained constant during constant driving mode for input signals, which are produced based on driver requirement targeting device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5005133A (en) * 1987-01-12 1991-04-02 Nissan Motor Company, Limited System and method for automatically controlling a vehicle speed to a desired cruising speed
KR930007604A (en) * 1991-10-18 1993-05-20 강용 Stone cutting machine
US5508925A (en) * 1992-01-29 1996-04-16 Mitsubishi Denki Kabushiki Kaisha Constant speed running device
JPH11348600A (en) * 1998-06-12 1999-12-21 Honda Motor Co Ltd Driving force control device for vehicle
DE102006012514A1 (en) * 2006-03-18 2007-09-20 Bayerische Motoren Werke Ag Motor vehicle, has control unit controlling drive unit such that vehicle speed is maintained constant during constant driving mode for input signals, which are produced based on driver requirement targeting device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109835335A (en) * 2017-11-28 2019-06-04 蔚来汽车有限公司 Electric vehicle cruise control method and system and vehicle, controller and storage medium
CN109835335B (en) * 2017-11-28 2021-11-09 蔚来(安徽)控股有限公司 Electric vehicle cruise control method and system, vehicle, controller and storage medium
CN108791304A (en) * 2018-06-11 2018-11-13 浙江国自机器人技术有限公司 A kind of double acceleration control method, system and relevant apparatus driven
CN108791305A (en) * 2018-06-11 2018-11-13 浙江国自机器人技术有限公司 A kind of double drive acceleration change curvature synchronous method, system and a relevant apparatus
EP3647142A1 (en) * 2018-10-31 2020-05-06 Robert Bosch GmbH Method and apparatus for controlling cruise control
US11142199B2 (en) 2018-10-31 2021-10-12 Robert Bosch Gmbh Method and apparatus for controlling cruise control
EP4163175A1 (en) * 2018-10-31 2023-04-12 Robert Bosch GmbH Method and apparatus for controlling cruise control

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