Internal combustion engine control device

Patent metadata

Field	Value
Publication number	US-10696302-B2
Application number	US-201615762404-A
Country	US
Kind code	B2
Filing date	Jul 28, 2016
Priority date	Sep 30, 2015
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

An internal combustion engine control device is provided. The internal combustion engine control device is provided with a generator that is driven by exhaust gas of the internal combustion engine. The internal combustion engine control device is capable of increasing the power generation of the generator. The internal combustion engine control device includes an exhaust amount control unit. The exhaust amount control unit increases the amount of the exhaust gas supplied to the generator in a coasting state.

First claim

The invention claimed is:

1. An internal combustion engine control device provided with a generator driven by an exhaust gas of an internal combustion engine, comprising:
an exhaust amount control unit configured to increase an amount of the exhaust gas supplied to the generator in a coasting state,
wherein a generation start signal to start power generation is supplied to the generator in the coasting state.

2. The internal combustion engine control device according to claim 1 ,
wherein the coasting state indicates a state where fuel injection to the internal combustion engine is stopped.

3. The internal combustion engine control device according to claim 1 ,
wherein the coasting state indicates a travel state where the internal combustion engine is rotated by power of a vehicle wheel.

4. The internal combustion engine control device according to claim 1 ,
wherein the exhaust amount control unit is configured to increase the amount of the exhaust gas in the coasting state compared to the amount of the exhaust gas supplied to the generator at a timing when fuel injection to the internal combustion engine is stopped.

5. The internal combustion engine control device according to claim 1 ,
wherein a throttle valve adjusting the amount of air flowing into the internal combustion engine is provided at an intake side of the internal combustion engine, and
wherein the exhaust amount control unit is configured to increase the amount of the exhaust gas supplied to the generator in the coasting state in which an opening degree of the throttle valve is increased.

6. The internal combustion engine control device according to claim 1 ,
wherein an intake valve opening and closing an intake port to suck air into the internal combustion engine is provided at an intake side of the internal combustion engine, and
wherein the exhaust amount control unit is configured to change an intake valve lifting amount to be increased or an intake valve closing timing so that charging efficiency of the internal combustion engine increases.

7. The internal combustion engine control device according to claim 1 ,
wherein the exhaust amount control unit is configured to increase the amount of the exhaust gas supplied to the generator when a pressure at an intake side of the internal combustion engine is equal to or larger than a setting value in the coasting state.

8. The internal combustion engine control device according to claim 1 ,
wherein the exhaust amount control unit is configured to keep or decrease the amount of the exhaust gas supplied to the generator when a pressure at an intake side of the internal combustion engine is smaller than a setting value even in the coasting state.

9. The internal combustion engine control device according to claim 8 ,
wherein the setting value is corrected based on a detection result of an external field recognition unit of a vehicle.

10. The internal combustion engine control device according to claim 1 ,
wherein a gear shift ratio of a transmission unit of a vehicle is changed so that a rotation speed of the internal combustion engine increases in the coasting state.

11. The internal combustion engine control device according to claim 10 ,
wherein the amount of the exhaust gas of the internal combustion engine changed by the exhaust amount control unit is increased or decreased based on any of at least the gear shift ratio of the transmission unit, an internal combustion engine rotation speed, and a vehicle speed.

12. An internal combustion engine control device provided with a generator driven by an exhaust gas of an internal combustion engine,
wherein a generation start signal to start power generation is supplied to the generator in a coasting state.

13. The internal combustion engine control device according to claim 12 ,
wherein the coasting state indicates a state where fuel injection to the internal combustion engine is stopped.

14. The internal combustion engine control device according to claim 12 ,
wherein the coasting state indicates a travel state where the internal combustion engine is rotated by power of a vehicle wheel.

15. The internal combustion engine control device according to claim 12 ,
wherein an exhaust amount control unit is configured to increase an amount of the exhaust gas in the coasting state compared to the amount of the exhaust gas supplied to the generator at a timing when fuel injection to the internal combustion engine is stopped.

16. The internal combustion engine control device according to claim 12 ,
wherein a throttle valve adjusting the amount of air flowing into the internal combustion engine is provided at an intake side of the internal combustion engine, and
wherein an exhaust amount control unit is configured to increase the amount of the exhaust gas supplied to the generator in the coasting state in which an opening degree of the throttle valve is increased.

17. The internal combustion engine control device according to claim 12 ,
wherein an intake valve opening and closing an intake port to suck air into the internal combustion engine is provided at an intake side of the internal combustion engine, and
wherein an exhaust amount control unit is configured to change an intake valve lifting amount to be increased or an intake valve closing timing so that charging efficiency of the internal combustion engine increases.

18. The internal combustion engine control device according to claim 12 ,
wherein an exhaust amount control unit is configured to increase the amount of the exhaust gas supplied to the generator when a pressure at an intake side of the internal combustion engine is equal to or larger than a setting value in the coasting state.

19. The internal combustion engine control device according to claim 12 ,
wherein an exhaust amount control unit is configured to keep or decrease the amount of the exhaust gas supplied to the generator when a pressure at an intake side of the internal combustion engine is smaller than a setting value even in the coasting state.

20. The internal combustion engine control device according to claim 19 ,
wherein the setting value is corrected based on a detection result of an external field recognition unit of a vehicle.

21. The internal combustion engine control device according to claim 12 ,
wherein a gear shift ratio of a transmission unit of a vehicle is changed so that a rotation speed of the internal combustion engine increases in the coasting state.

22. The internal combustion engine control device according to claim 21 ,
wherein the amount of the exhaust gas of the internal combustion engine changed by an exhaust amount control unit is increased or decreased based on any of at least the gear shift ratio of the transmission unit, an internal combustion engine rotation speed, and a vehicle speed.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Okuda Yuuki
• ORYOJI Kazuhiro
• Saruwatari Masayuki

Classifications

• F16H59/74

  Inputs being a function of engine parameters (F16H59/14 takes precedence) · CPC title

• B60W10/06 Primary

  including control of combustion engines · CPC title

• Y02T10/40

  Engine management systems · CPC title

• Y02T10/60

  Other road transportation technologies with climate change mitigation effect · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title