AUTOMATED DRIVING SYSTEM OF VEHICLE

• US 20160320776A1
• Filed: 04/26/2016
• Published: 11/03/2016
• Est. Priority Date: 04/30/2015
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: HOKI, Yusuke, INAMI, Norio
• Granted Patent: US 9,891,623 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F01P 7/16 by thermostatic control
• CPC Class Codes: F02D 2041/1412 using a predictive controller
• CPC Class Codes: F02D 2200/021 Engine temperature
• CPC Class Codes: F02D 2200/0406 Intake manifold pressure
• CPC Class Codes: F02D 2200/701 Information about vehicle position, e.g. from navigation system or GPS signal
• CPC Class Codes: F02D 2200/702 Road conditions
• CPC Class Codes: F02D 2250/21 during a transition between engine operation modes or states
• CPC Class Codes: F02D 2250/22 by keeping a torque reserve, i.e. with temporarily reduced drive train or engine efficiency
• CPC Class Codes: F02D 23/02 the engines being of fuel-injection type
• CPC Class Codes: F02D 41/00 Electrical control of supply of combustible mixture or its constituents F02D43/00 takes precedence ; control of engine starters F02N11/08, electrical control of engine ignition timing F02P5/145
• CPC Class Codes: F02D 41/0007 for control of turbo-charged or super-charged engines control of the pumps per se F02B37/12
• CPC Class Codes: F02D 41/005 according to engine operating conditions
• CPC Class Codes: F02D 41/021 Introducing corrections for particular conditions exterior to the engine conjoint control of vehicle sub-units for propelling the vehicle B60W30/18
• CPC Class Codes: G01C 21/34 Route searching; Route guidance
• CPC Class Codes: G05D 1/0088 characterized by the autonomous decision making process, e.g. artificial intelligence, predefined behaviours using knowledge based models G06N5/00
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A driving plan of the vehicle is generated based on the map information and the information on the surroundings of the vehicle detected by a detection sensor, and an automated driving operation of the vehicle is controlled based on this driving plan. When a change in the operating state of the engine is predicted from the driving plan, an advanced control of the control command value of the engine operation control device where the control command value of the engine operation control device is made to change is started in advance of the predicted change of the operating state of the engine. When there is a demand for sudden stop of the vehicle contrary to the driving plan of the vehicle, this advanced control is stopped.

Claims

1. An automated driving system of a vehicle comprising:

a detection sensor for detecting information on surroundings of the vehicle and,

an electronic control unit configured to generate a driving plan for the vehicle along a predetermined target route based on map information and the information of the surroundings of the vehicle detected by the detection sensor, the electronic control unit is further configured to control an automated driving of the vehicle based on the generated driving plan for the vehicle, wherein

said electronic control unit is configured to start an advanced control of a control command value of an engine operation control device when a change in the operating state of the engine is predicted from said driving plan, where the control command value of the engine operation control device is made to change in a direction which is based on and prior to a predicted operating state of the engine, and

said electronic control unit is configured to stop said advanced control of a control command value when there is a demand for sudden stop of the vehicle contrary to the driving plan of the vehicle along the predetermined target route based on the information on the surroundings of the vehicle detected by the detection sensor.

2. The automated driving system of a vehicle as claimed in claim 1, wherein said demand for sudden stop of the vehicle is made to be issued when avoiding contact with an external moving obstacle which is detected by the detection sensor.

3. The automated driving system of a vehicle as claimed in claim 1, wherein said engine operation control device is comprised of a cooling water temperature control device for controlling a temperature of a cooling water of an engine, said electronic control unit is configured to start an advanced control for lowering water temperature where the temperature of the cooling water of the engine is made to fall before a load of the engine rises when it is predicted from said driving plan that a rise in the load of the engine will cause the temperature of the cooling water of the engine to exceed a predetermined target range, and said electronic control unit is configured to stop said advanced control for lowering water temperature when there is the demand for sudden stop of the vehicle.

4. The automated driving system of a vehicle as claimed in claim 3, wherein said cooling water temperature control device is comprised of a flow control valve which controls an amount of the engine cooling water fed from an inside of an engine body to a radiator, said control command value is an opening degree of the flow control valve, and said advanced control for lowering water temperature is performed by controlling the opening degree of the flow control valve.

5. The automated driving system of a vehicle as claimed in claim 3, wherein said cooling water temperature control device is comprised of an electric water pump which controls an amount of the engine cooling water fed from an inside of an engine body to a radiator, said control command value is an electric power fed to the electric water pump, and said advanced control for lowering water temperature is performed by controlling the electric power fed to the electric water pump.

6. The automated driving system of a vehicle as claimed in claim 1, wherein said engine operation control device is comprised of a cooling water temperature control device for controlling a temperature of a cooling water of an engine, said electronic control unit is configured to start an advanced control for raising water temperature where the temperature of the cooling water of the engine is made to rise before a load of the engine falls when it is predicted from said driving plan that a fall in the load of the engine will cause the temperature of the cooling water of the engine to become a predetermined target range or less, and said electronic control unit is configured to stop said advanced control for raising water temperature when there is the demand for sudden stop of the vehicle.

7. The automated driving system of a vehicle as claimed in claim 6, wherein said cooling water temperature control device is comprised of a flow control valve which controls an amount of the engine cooling water fed from an inside of an engine body to a radiator, said control command value is an opening degree of the flow control valve, and said advanced control for raising water temperature is performed by controlling the opening degree of the flow control valve.

8. The automated driving system of a vehicle as claimed in claim 6, wherein said cooling water temperature control device is comprised of an electric water pump which controls an amount of the engine cooling water fed from an inside of an engine body to a radiator, said control command value is an electric power fed to the electric water pump, and said advanced control for raising water temperature is performed by controlling the electric power fed to the electric water pump.

9. The automated driving system of a vehicle as claimed in claim 1, wherein said engine operation control device is comprised of an exhaust gas recirculation flow control device for controlling an amount of exhaust gas recirculation flow of the engine, said electronic control unit is configured to start an advanced control for increasing recirculation exhaust gas flow amount where the amount of the recirculation exhaust gas flow is made to increase before a load of the engine rises when it is predicted from said driving plan that the load of the engine will rise, and said electronic control unit is configured to stop said advanced control for increasing recirculation exhaust gas flow amount when there is the demand for sudden stop of the vehicle.

10. The automated driving system of a vehicle as claimed in claim 9, wherein said exhaust gas recirculation flow control device is comprised of an exhaust gas recirculation control valve arranged in an exhaust gas recirculation passage of the engine, said control command value is an opening degree of the exhaust gas recirculation control valve, and said advanced control for increasing recirculation exhaust gas flow amount is performed by controlling the opening degree of the exhaust gas recirculation control valve.

11. The automated driving system of a vehicle as claimed in claim 1, wherein said engine operation control device is a cooling water flow control device for controlling an amount of flow of cooling water of an exhaust gas recirculation cooling device of the engine, said electronic control unit is configured to start an advanced control for lowering exhaust gas recirculation temperature where the amount of flow of cooling water of the exhaust gas recirculation cooling device is made to increase before a load of the engine rises when it is predicted from said driving plan that the load of the engine will rise, and said electronic control unit is configured to stop said advanced control for lowering exhaust gas recirculation temperature when there is the demand for sudden stop of the vehicle.

12. The automated driving system of a vehicle as claimed in claim 11, wherein said cooling water flow control device is comprised of a bypass valve for controlling an amount of engine cooling water fed from an inside of an engine body to the exhaust gas recirculation cooling device, said control command value is an opening degree of the bypass valve to an exhaust gas recirculation cooling device side, and said advanced control for lowering exhaust gas recirculation temperature is performed by controlling the opening degree of the bypass valve to the exhaust gas recirculation cooling device side.

13. The automated driving system of a vehicle as claimed in claim 1, wherein said engine operation control device is comprised of a supercharging pressure control device for controlling a supercharging pressure, said electronic control unit is configured to start an advanced control for increasing the supercharging pressure where the supercharging pressure is made to increase before a load of the engine rises when it is predicted from said driving plan that the load of the engine will rise, and said electronic control unit is configured to stop said advanced control for increasing supercharging pressure when there is the demand for sudden stop of the vehicle.

14. The automated driving system of a vehicle as claimed in claim 13, wherein said supercharging pressure control device is comprised of a variable nozzle type exhaust turbocharger, said control command value is an opening degree of a nozzle of the variable nozzle type exhaust turbine, and said advanced control for increasing supercharging pressure is performed by controlling the opening degree of the nozzle of the variable nozzle type exhaust turbine.

15. The automated driving system of a vehicle as claimed in claim 13, wherein said supercharging pressure control device is comprised of an electric power type intake compressor, said control command value is an electric power fed to an electric motor which drives the intake compressor, and said advanced control for increasing supercharging pressure is performed by controlling the electric power fed to the electric motor.