Control of preparatory measures in a vehicle

• US 10,495,013 B2
• Filed: 06/16/2015
• Issued: 12/03/2019
• Est. Priority Date: 07/07/2014
• Status: Active Grant

• Current Assignee: Scania CV AB (Volkswagen AG)
• Original Assignee: Scania CV AB (Volkswagen AG)
• Inventors: Roos, Fredrik, Ogren, Mikael, Larsson, Olof
• Primary Examiner(s): Kiswanto, Nicholas
• Application Number:
  US15/320,962
• Publication Number:
  US 20170159593A1
• Time in Patent Office: 1,631 Days
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 10/30 including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• CPC Class Codes: B60W 20/13 in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: B60W 2030/1809 Without torque flow between driveshaft and engine, e.g. with clutch disengaged or transmission in neutral
• CPC Class Codes: B60W 2552/15 Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 2552/20 Road profile, i.e. the change in elevation or curvature of a plurality of continuous road segments
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 30/18072 Coasting
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: F02D 2200/021 Engine temperature
• CPC Class Codes: F02D 2200/702 Road conditions
• CPC Class Codes: F02D 41/042 for stopping the engine
• CPC Class Codes: F02D 41/26 using computer, e.g. microprocessor
• CPC Class Codes: Y10S 903/946 Characterized by control of driveline clutch

Abstract

The present invention presents a method and a system for the control of preparatory measures during a road section, for at least one system. First, one or several parts of a road section are identified, during which parts one or several engines comprised in the vehicle may be shut down. Such identification is carried out when the road section is ahead of the vehicle, that is to say before the vehicle has entered the road section. The identification is based on available information about the road section. Subsequently it is determined whether at least one preparatory measure for at least one respective system in the vehicle needs to be carried out, in order to facilitate that one or several of the engines may be shut down. Subsequently, the preparatory measures are controlled based on the determination of the need to carry out the at least one preparatory measure.

Claims

1. A method for control of preparatory measures associated with entering a part of a road section for at least one system in a vehicle, said method comprising:

identification of one or several parts of a road section, when one or several engines comprised in said vehicle may be shut down while said vehicle is coasting in said road section, wherein said identification of said part of the road section is carried out when said part of the road section is ahead of said vehicle, and wherein said identification is based on information about said part of the road section, wherein said information about said road section is determined based on information from one or more sources selected from the group of;

map data in combination with positioning information;

positioning information stored previously in the vehicle;

radar-based information;

camera-based information;

information obtained from another vehicle than said vehicle; and

information obtained from traffic systems relating to said road section;

determination of whether at least one preparatory measure for at least one respective system needs to be carried out before entering the road section where shutdown of said one or several engines occurs, wherein at least one of a charging status of batteries, temperatures of different systems in the vehicle, or pneumatic or hydraulic pressure in systems in the vehicle is analyzed to determine if at least one preparatory measure needs to be carried out or not before entering the road section; and

control of said at least one preparatory measure initiated before entering the road section, based on said determination of the need to carry out said at least one preparatory measure, so that the one or several engines comprised in said vehicle may be shut down, while said vehicle is coasting in said road section.

2. A method according to claim 1, wherein

said at least one system comprises at least one compressor;

said determination comprises a comparison of a pressure P with a pressure threshold value R_th; and

said control comprises an activation of said at least one compressor, if said pressure P is lower than said pressure threshold value R_th;

P<

P_th.

3. A method according to claim 2, wherein said pressure P corresponds to one among the group of:

an air pressure P_air, wherein said pressure threshold value P_th is an air pressure threshold value P_{air_th};

or

a hydraulic pressure P_hyd, wherein said pressure threshold value P_th is a hydraulic pressure threshold value P_{hyd_th}.

4. A method according to claim 1, wherein:

said at least one system comprises at least one battery charging device;

said determination comprises a comparison of a charging status L for one or several batteries in said vehicle with a charging threshold value L_th; and

said control comprises an activation of said at least one battery charging device, if said charging status L is greater than said charging threshold value L_th;

L<

L_th.

5. A method according to claim 1, wherein:

said at least one system comprises at least one temperature control device;

said determination comprises a comparison of a temperature T in said vehicle with a temperature interval [T_min,T_max]; and

said control comprises activation of said at least one temperature control device, if said temperature T is outside of said temperature interval [T_min,T_max].

6. A method according to claim 5, wherein said temperature T corresponds to one among the group of:

an engine temperature T_e, whereat said temperature interval is an engine temperature interval [T_{e_min},T_{e_max}];

a cabin temperature T_h, whereat said temperature interval is a cabin temperature interval [T_{h_min},T_{h_max}];

or

a catalyst temperature T_c, whereat said temperature interval is a catalyst temperature interval [T_{c_min},T_{c_max}].

7. A method according to claim 1, wherein said identification of one or several parts where said one or more engines may be shut down comprises a determination of a time period T_{ICE_on}, during which said vehicle will be driven with said one or several engines running, before said one or several engines will be shut down.

8. A method according to claim 7, wherein:

said time period T_{ICE_on}, during which said vehicle will be driven with said one or more engines running, is compared with at least one preparation time T_prep required to carry out the respective at least one preparatory measure; and

said identification and/or said control of said preparatory measures is based on said comparison.

9. A method according to claim 1, wherein said identification of one or several parts where one or several engines may be shut down comprises:

simulation of at least one future speed profile v_sim for an actual speed v_ast of said vehicle during said road section, wherein said simulation is carried out when said road section is ahead of said vehicle and wherein said simulation of each one of said at least one future speed profile v_sim is based on said information about said road section; and

evaluation of whether said one or several engines may be shut down at least partly during said road section, wherein said evaluation of the shutdown of said one or more engines is based at least on said at least one future speed profile v_sim.

11. A method according to claim 1, wherein said identification of one or several parts where said one or several engines may be shut down comprises:

analysis of a driving force requirements F_driv during said road section;

evaluation of whether said one or several engines may be shut down at least partly during said road section, wherein said evaluation of the shutdown is based at least on said analysis of said driving force requirements F_driv; and

determination, based on said analysis of said driving force requirement F_driv, of a time period T_{ICE_on}, during which said vehicle will be driven with said one or more engines running, before said one or more engines will be shut down.

12. A method according to claim 9, wherein said at least one future speed profile v_sim comprises at least two different simulations v_{sim_1}, v_{sim_2}, wherein each one of such at least two simulations v_{sim_1}, v_{sim_2} is based on a preparatory time T_{prep_1}, T_{prep_2} for one of the systems.

13. A method according to claim 9, wherein said at least one future speed profile v_sim comprises:

a simulation of a cruise control regulation of said actual speed vast during at least one preparation time period T_{prep_1}, T_{prep_2}; and

a simulation of coasting, wherein said coasting follows after the cruise control regulation.

14. A method according to claim 1, wherein said information about said road section is provided by a cruise control system, which uses map data and positioning information at cruise control.

15. A method according to claim 1, wherein said coasting is achieved by way of one or several from among the group:

an opening of a clutch in said vehicle;

or

a shift operation to a neutral gear in a gearbox in said vehicle.

10. A method for control of preparatory measures associated with entering a part of a road section for at least one system in a vehicle, said method comprising:

identification of one or several parts of a road section, when one or several engines comprised in said vehicle may be shut down while said vehicle is coasting in said road section, wherein said identification of said part of the road section is carried out when said part of the road section is ahead of said vehicle, and wherein said identification is based on information about said part of the road section, wherein said identification of one or several parts where said one or several engines may be shut down comprises;

analysis of a road gradient α

comprised in said information about said road section;

evaluation of whether said one or more engines may be shut down at least partly during said road section, wherein said evaluation of the shutdown is based at least on said analysis of said road gradient α

; and

determination, based on said analysis of said road gradient α

, of a time period T_{ICE_on}, during which said vehicle will be driven with said one or more engines running, before said one or several engines will be shut down;

determination of whether at least one preparatory measure for at least one respective system needs to be carried out before entering the road section where shutdown of said one or several engines occurs, wherein at least one of a charging status of batteries, temperatures of different systems in the vehicle, or pneumatic or hydraulic pressure in systems in the vehicle is analyzed to determine if at least one preparatory measure needs to be carried out or not before entering the road section; and

control of said at least one preparatory measure initiated before entering the road section, based on said determination of the need to carry out said at least one preparatory measure, so that the one or several engines comprised in said vehicle may be shut down, while said vehicle is coasting in said road section.

16. A computer program product comprising computer program code stored on a non-transitory computer-readable medium readable by a computer, said computer program product used for control of preparatory measures associated with entering a part of road section for at least one system in a vehicle, said computer program code comprising computer instructions to cause one or more computer processors to perform the operations of:

identification of one or several parts of a road section, when one or several engines comprised in said vehicle may be shut down while said vehicle is coasting in said road section, wherein said identification of said part of the road section is carried out when said part of the road section is ahead of said vehicle, and wherein said identification is based on information about said part of the road section, wherein said information about said road section is determined based on information from one or more sources selected from the group of;

map data in combination with positioning information;

positioning information stored previously in the vehicle;

radar-based information;

camera-based information;

information obtained from another vehicle than said vehicle; and

information obtained from traffic systems relating to said road section;

determination of whether at least one preparatory measure for at least one respective system needs to be carried out before entering the road section where shutdown of said one or several engines occurs, wherein at least one of a charging status of batteries, temperatures of different systems in the vehicle, or pneumatic or hydraulic pressure in systems in the vehicle is analyzed to determine if at least one preparatory measure needs to be carried out or not before entering the road section; and

control of said at least one preparatory measure initiated before entering the road section, based on said determination of the need to carry out said at least one preparatory measure, so that the one or several engines comprised in said vehicle may be shut down, while said vehicle is coasting in said road section.

17. A system arranged for control of preparatory measures associated with entering a part of a road section for at least one system in a vehicle, said system comprising:

an identification unit, arranged for identification of one or several parts of a road section, when one or several engines comprised in said vehicle may be shut down while said vehicle is coasting in said road section, wherein said identification of said part of the road section is carried out when said part of the road section is ahead of said vehicle, and wherein said identification is based on information about said part of the road section, wherein said information about said road section is determined based on information from one or more sources selected from the group of;

map data in combination with positioning information;

positioning information stored previously in the vehicle;

radar-based information;

camera-based information;

information obtained from another vehicle than said vehicle; and

information obtained from traffic systems relating to said road section;

a determination unit, arranged for determination of whether at least one preparatory measure for at least one respective system needs to be carried out before entering the road section where shutdown of said one or several engines occurs, wherein at least one of a charging status of batteries, temperatures of different systems in the vehicle, or pneumatic or hydraulic pressure in systems in the vehicle is analyzed to determine if at least one preparatory measure needs to be carried out or not before entering the road section; and

a preparation control unit, arranged for control of said at least one preparatory measure initiated before entering the road section, based on said determination of the need to carry out said at least one preparatory measure, so that the one or several engines comprised in said vehicle may be shut down, while said vehicle is coasting in said road section.