System for producing an adaptive driving strategy based on emission optimization

• US 8,145,376 B2
• Filed: 02/16/2009
• Issued: 03/27/2012
• Est. Priority Date: 02/16/2009
• Status: Active Grant

• Current Assignee: Toyota Motor Corporation
• Original Assignee: Toyota Motor Engineering & Manufacturing North America Incorporated (Toyota Motor Corporation)
• Inventors: Sherony, Rini
• Primary Examiner(s): To, Toan
• Application Number:
  US12/371,815
• Publication Number:
  US 20100211247A1
• Time in Patent Office: 1,135 Days
• Field of Search: 701/23, 701/25, 701/26, 701/29, 701/213, 701/214
• US Class Current: 701/23
• CPC Class Codes: B60W 2050/0031 Mathematical model of the vehicle
• CPC Class Codes: B60W 2554/00 Input parameters relating to objects
• CPC Class Codes: B60W 2555/60 Traffic rules, e.g. speed limits or right of way
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration
• CPC Class Codes: B60W 30/1882 characterised by the working point of the engine, e.g. by using engine output chart
• CPC Class Codes: B60W 40/072 Curvature of the road
• CPC Class Codes: B60W 40/076 Slope angle of the road
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: Y02T 10/40 Engine management systems
• CPC Class Codes: Y02T 10/84 Data processing systems or methods, management, administration

Abstract

The system includes a road scenario sensor, a vehicle control unit, and a computer processing unit. The road scenario sensor detects upcoming road scenarios for the system vehicle. The computer processing unit receives an input from the road scenario sensor and determines a upcoming driving event based upon the detected upcoming road scenarios. The computer processing unit compares the upcoming driving event with an ideal emissions model having acceptable emission thresholds to determine an adaptive driving strategy. The adaptive driving strategy configures the system vehicle to reduce emissions for the upcoming driving event. The adaptive driving strategy optionally includes an optimal acceleration rate and/or an optimal power management strategy. The optimal acceleration rate is based upon the required speed of the vehicle at the upcoming driving event and the distance from the vehicle to the upcoming driving event, and the ideal emissions model having acceptable emission thresholds.

Claims

1. A system for reducing the emissions of a vehicle through the use of an adaptive driving strategy, said system comprising:

a road scenario sensor for detecting upcoming road scenarios;

a vehicle control unit capable of manipulating vehicle parameters; and

a computer processing unit having an ideal emission model, said computer processing unit receives an input from said road scenario sensor to determine an upcoming driving event, said computer processing unit compares said upcoming driving event with said ideal emission model to determine a driving strategy which configures the vehicle to reduce emissions for said upcoming driving event;

wherein said vehicle control unit implements said driving strategy.

2. The system of claim 1, wherein said computer processing unit further comprises:

a scenario analysis circuit which process said detected road scenarios to determine said upcoming driving events of the vehicle;

a decision making circuit which process said upcoming driving events to determine required actions of the vehicle to comply with said upcoming driving events; and

an optimal emission circuit having said ideal emission model and a vehicle drive train model;

said optimal emission circuit compares said required actions of the vehicle with said ideal emission model and said vehicle drive train model to determine an adaptive driving strategy which configures the vehicle to reduce emissions while conducting said required actions.

3. The system of claim 2, further comprising:

a location sensor to detect a current location of the vehicle; and

a velocity sensor to detect a current vehicle speed;

wherein said required actions of the vehicle include a required speed of the vehicle at said upcoming driving event and a location of said upcoming driving event;

said road scenario sensor detects a location of the said road scenario;

wherein said adaptive driving strategy is an optimal acceleration rate which accelerates the vehicle from the current vehicle speed to said required speed within a distance between said current location of the vehicle and said location of said upcoming driving event with a lowest amount of emissions produced;

wherein said vehicle control unit manipulates said parameters of the vehicle such that said vehicle acceleration is equal to said optimal acceleration rate.

4. The system of claim 2, further comprising:

a plurality of vehicle operation sensors which detect additional driving factors that relate to the production of emissions;

wherein said optimal emissions circuit determines an adaptive driving strategy which includes an optimal power management strategy having at least one emissions reducing action.

5. The system of claim 4, wherein said plurality of vehicle operation sensors includes a window sensor for detecting whether each of the windows of the vehicle is in an open or closed position;

said vehicle control unit is further capable of manipulating the parameters of the vehicle to control the position of each of the windows of the vehicle; and

wherein said optimal power management strategy includes said emissions reducing action of positioning windows detected in an open position to a closed position.

6. The system of claim 4, wherein said plurality of vehicle operation sensors includes an environmental control sensor for detecting an operation of an environmental control system of the vehicle;

said vehicle control unit is further capable of manipulating the parameters of the vehicle to control the operation of the environmental control system; and

wherein said optimal power management strategy includes the emissions reducing action of deactivating the environmental control system.

7. The system of claim 4, wherein said plurality of vehicle operation sensors includes an energy consumption sensor to detect an operation of non-essential electronic accessories of the vehicle;

said vehicle control unit is further capable of manipulating the parameters of the vehicle to control the operation of non-essential electronic accessories; and

wherein said optimal power management strategy includes said emissions reducing action of deactivating non-essential electronic accessories.

8. The system of claim 4, wherein said optimal power management strategy is implemented according to an emissions hierarchy, said hierarchy classifies each of said emissions reducing action under the control of said optimal power management strategy according to an amount of reduction in emissions afforded by each of said emissions reducing actions, and said hierarchy implements said emissions reducing actions with a highest amount of reduction in emissions prior to said emissions reducing actions with a lowest amount of reduction in emissions.

9. The system of claim 2, wherein said ideal emissions model is an ideal CO₂ emissions model.

10. A system for reducing the emissions of a vehicle through the use of an adaptive driving strategy, said system comprising:

a road scenario sensor to detect upcoming events, said road sensor capable of determining a required speed of the vehicle at said upcoming event and a distance from the vehicle to said upcoming event;

an emission sensor to detect an actual emissions of the vehicle;

a velocity sensor to determine a velocity of the vehicle;

an acceleration sensor to determine an acceleration of the vehicle;

a vehicle control unit to capable of manipulating an operation of a drive train of the vehicle; and

a computer processing unit having an ideal emission model with acceptable emission thresholds and a drive train model of the vehicle stored therein;

wherein said computer processing unit determines a type of upcoming event of the vehicle based upon input from said road scenario sensor and determines upcoming actions of the vehicle required to comply with said upcoming event;

said computer processing unit determines an optimal acceleration rate based upon said required speed, said distance to said upcoming event, said vehicle velocity, said vehicle acceleration, said ideal emission model and said drive train model, said optimal acceleration rate being an acceleration with the lowest amount of vehicle emissions produced which will accelerate the vehicle from said vehicle velocity to said required speed within said distance to said upcoming event;

wherein said vehicle control unit manipulates the operation of the drive train of the vehicle such that said vehicle acceleration is equal to said optimal acceleration rate.

11. A method of reducing the emissions of a vehicle through the use of an adaptive driving strategy, said method comprising the steps of:

determining an upcoming event of the vehicle;

determining upcoming actions of the vehicle required to comply with said upcoming event;

comparing said determined upcoming actions of the vehicle with an ideal emission model;

determining an adaptive driving strategy that reduces vehicle emissions for said upcoming actions; and

implementing said adaptive driving strategy.

12. The method of claim 11, wherein the step of determining said upcoming vehicle actions comprises determining a current vehicle speed, a distance from the vehicle to said upcoming event and a required speed of the vehicle at said upcoming event.

13. The method of claim 12, wherein the step of determining an adaptive driving strategy comprises determining an optimal acceleration rate of the vehicle, said optimal acceleration rate is based upon said current vehicle speed, said required speed, said distance to said upcoming event, said ideal emission model of the vehicle and a model of a drive train of the vehicle, and wherein said optimal acceleration rate is an acceleration rate with a lowest amount of vehicle emissions produced which is capable of accelerating the vehicle from said current velocity to said required speed within said distance to said upcoming event.

14. The method of claim 13, wherein said vehicle emissions model is a CO₂ emissions model.

15. The method of claim 13, wherein the step of determining an adaptive driving strategy further comprises determining an optimal power management strategy having at least one emissions reducing action that manipulates an additional driving factor to reduce said amount of emissions produced.

16. The method of claim 15, wherein said optimal power management includes an emissions reducing action of positioning windows detected in an open position to a closed position.

17. The method of claim 15, wherein said optimal power management includes an emissions reducing action of deactivating an environmental control system.

18. The method of claim 15, wherein said optimal power management includes an emissions reducing action of deactivating non-essential electronic accessories.

19. The method of claim 15, wherein said optimal power management strategy is implemented according to an emissions hierarchy, said hierarchy classifies each emissions reducing action under the control of said adaptive driving strategy according to an amount of reduction in emissions afforded by each of said emissions reducing actions, and wherein said emissions reducing actions with a highest amount of reduction in emissions are implemented prior to said emissions reducing actions with a lowest amount of reduction in emissions.