Automated driving system of vehicle

Patent metadata

Field	Value
Publication number	US-9891623-B2
Application number	US-201615138528-A
Country	US
Kind code	B2
Filing date	Apr 26, 2016
Priority date	Apr 30, 2015
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

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.

First claim

The invention claimed is:

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 aut

Assignees

• Toyota Motor Co Ltd

Inventors

• Inami Norio
• Hoki Yusuke

Classifications

• F02D41/00 Primary

  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 title

• F01P7/16 Primary

  by thermostatic control · CPC title

• Y02T10/47

  Cross-Sectional Technologies · mapped topic

• F02D2200/021

  Engine temperature · CPC title

• G01C21/34

  Route searching; Route guidance · CPC title