CONTROL DEVICE OF TURBOCHARGER

• US 20120121392A1
• Filed: 11/12/2010
• Published: 05/17/2012
• Est. Priority Date: 11/12/2010
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Azuma, Yasuhiro
• Granted Patent: US 8,683,799 B2
• Time in Patent Office: Days
• US Class Current: 415/151
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: F01D 15/10 Adaptations for driving, or combinations with, electric generators
• CPC Class Codes: F01D 17/143 the shiftable member being a wall, or part thereof of a radial diffuser
• CPC Class Codes: F01D 17/165 for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line F01D17/167 takes precedence
• CPC Class Codes: F02B 37/24 by using pumps or turbines with adjustable guide vanes
• CPC Class Codes: F02C 6/12 Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
• 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 41/042 for stopping the engine
• CPC Class Codes: F02D 41/062 for starting F02D41/061 takes precedence
• CPC Class Codes: F02N 11/0814 comprising means for controlling automatic idle-start-stop
• CPC Class Codes: F05D 2220/40 in turbochargers
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

In a turbocharger including a variable nozzle vane mechanism including a plurality of nozzle vanes provided on an outer circumferential side of a turbine wheel, the variable nozzle vane mechanism adjusting a flow of an exhaust gas with the nozzle vanes; and an actuator driving the nozzle vane mechanism, a control is continued that causes a movable member of the variable nozzle vane mechanism to abut against a mechanical stopper limiting the range of the movement of the nozzle vanes as long as the engine is stopped while the vehicle is running. Thus, wear of, for example, a link and a rod constituting the variable nozzle vane mechanism can be prevented during an engine stop while the vehicle is running.

Claims

1. A control device of a turbocharger comprising:

a turbine wheel provided in an exhaust path of an engine mounted to a vehicle;

a compressor impeller provided in an intake path of the engine;

a variable nozzle vane mechanism including a plurality of nozzle vanes provided on an outer circumferential side of the turbine wheel, the variable nozzle vane mechanism adjusting a flow of an exhaust gas with the plurality of nozzle vanes; and

an actuator driving the nozzle vane mechanism;

wherein the control device continues an abutting control that causes a movable member of the variable nozzle vane mechanism to abut against a mechanical stopper as long as the engine is stopped while the vehicle is running.

2. The control device of the turbocharger according to claim 1,

wherein the mechanical stopper is a stopper that limits a range of movement of the nozzle vanes.

3. The control device of the turbocharger according to claim 1,

wherein the actuator driving the variable nozzle vane mechanism is a motor-type actuator including an electric motor, which continuously performs said abutting control by continuously causing a current to flow through the electric motor as long as the engine is stopped while the vehicle is running.

4. ‘

The control device of the turbocharger according to claim 3,

wherein the current flowing through the electric motor is limited during said abutting control.

5. The control device of the turbocharger according to claim 1,

wherein said abutting control is continued from a stopping of the engine in accordance with an engine stop request until there is an engine start request.

6. The control device of the turbocharger according to claim 2,

wherein the actuator driving the variable nozzle vane mechanism is a motor-type actuator including an electric motor, which continuously performs said abutting control by continuously causing a current to flow through the electric motor as long as the engine is stopped while the vehicle is running.

7. The control device of the turbocharger according to claim 6,

wherein the current flowing through the electric motor is limited during said abutting control.

8. The control device of the turbocharger according to claim 2,

wherein said abutting control is continued from a stopping of the engine in accordance with an engine stop request until there is an engine start request.

9. The control device of the turbocharger according to claim 3,

wherein said abutting control is continued from a stopping of the engine in accordance with an engine stop request until there is an engine start request.

10. The control device of the turbocharger according to claim 4,

wherein said abutting control is continued from a stopping of the engine in accordance with an engine stop request until there is an engine start request.

11. The control device of the turbocharger according to claim 6,

wherein said abutting control is continued from a stopping of the engine in accordance with an engine stop request until there is an engine start request.

12. The control device of the turbocharger according to claim 7,

wherein said abutting control is continued from a stopping of the engine in accordance with an engine stop request until there is an engine start request.