Vehicle-mounted power generator set

• US 20060103239A1
• Filed: 11/08/2005
• Published: 05/18/2006
• Est. Priority Date: 11/12/2004
• Status: Active Grant

• Current Assignee: Kokusan Denki Company Limited (MAHLE-STIFTUNG GmbH)
• Original Assignee: Kokusan Denki Company Limited (MAHLE-STIFTUNG GmbH)
• Inventors: Kishibata, Kazuyoshi, Sekita, Tomoaki, Endou, Masahiko
• Granted Patent: US 7,289,901 B2
• Time in Patent Office: Days
• US Class Current: 307/10.100
• CPC Class Codes: F02D 31/001 Electric control of rotation speed
• CPC Class Codes: F02D 41/0205 using an auxiliary engine speed control engine speed control per se F02D31/00
• CPC Class Codes: F02D 41/083 taking into account engine load variation, e.g. air-conditionning

Abstract

A vehicle-mounted power generator set including: an AC generator driven by an engine of a vehicle; an electric power conversion portion that converts an output of the AC generator into an AC output having commercial frequency; a controller having electric power conversion portion control means for controlling the conversion portion to generate an AC output having commercial frequency when a control mode is a power generation mode, and engine control means for controlling the engine to rotate at a rotational speed suitable for supplying electric power from the conversion portion to a load when the control mode is the power generation mode and controlling the engine to be suitable for driving the vehicle when the control mode is the vehicle driving mode; and a control switch inserted between each output terminal of the AC generator and each input terminal of the electric power conversion portion, and controlled to be in an ON state when the control mode is the power generation mode and in an OFF state when the control mode is the vehicle driving mode.

Claims

1. A vehicle-mounted power generator set comprising:

an AC generator mounted in a vehicle and driven by an engine which drives the vehicle;

an electric power conversion portion that converts an output of said AC generator into an AC output having commercial frequency;

a mode selection switch that is operated to be in different states between when a control mode is a power generation mode and when the control mode is a vehicle driving mode;

a controller having electric power conversion portion control means for controlling said electric power conversion portion to generate an AC output having a fixed frequency from said electric power conversion portion when said control mode is the power generation mode, and engine control means for controlling said engine to rotate at a rotational speed suitable for supplying electric power from said electric power conversion portion to a load when said control mode is the power generation mode and controlling said engine to be suitable for driving of said vehicle when the control mode is the vehicle driving mode; and

a power generation output supply control switch that is inserted between each output terminal of said AC generator and each input terminal of said electric power conversion portion, and controlled to be turned on/off in synchronization with said mode selection switch so as to be in an ON state when said control mode is the power generation mode and in an OFF state when said control mode is the vehicle driving mode.

2. The vehicle-mounted power generator set according to claim 1, wherein said controller comprises overspeed protection control means for controlling to stop at least either an ignition operation of said engine or supply of fuel to said engine when the rotational speed of said engine exceeds a predetermined set speed with the control mode being switched to the power generation mode to limit the rotational speed of said engine to said set speed or less in order to prevent an overvoltage from being applied from said AC generator to said electric power conversion portion.

3. The vehicle-mounted power generator set according to claim 1, wherein said controller comprises overvoltage protection control means for controlling to stop at least either an ignition operation of said engine or supply of fuel to said engine when an output voltage of said AC generator exceeds a predetermined set voltage with the control mode being switched to the power generation mode to reduce the rotational speed of said engine and limit the output voltage of said AC generator to said set voltage or less in order to prevent an overvoltage from being applied from said AC generator to said electric power conversion portion.

4. A vehicle-mounted power generator set comprising:

an AC generator mounted in a vehicle and driven by an engine which drives the vehicle;

an electric power conversion portion that converts an output of said AC generator into an AC output having commercial frequency;

a mode selection switch that is operated to be in different states between when a control mode is a power generation mode and when the control mode is a vehicle driving mode;

a controller having electric power conversion portion control means for controlling said electric power conversion portion to generate an AC output having a fixed frequency from said electric power conversion portion when said control mode is the power generation mode, and engine control means for controlling said engine to rotate at a rotational speed suitable for supplying electric power from said electric power conversion portion to a load when said control mode is the power generation mode and controlling said engine to be suitable for driving of said vehicle when the control mode is the vehicle driving mode; and

an electromagnetic relay having a contact inserted between each output terminal of said AC generator and each input terminal of said electric power conversion portion,

wherein said controller comprises relay control means for controlling said electromagnetic relay according to the state of said mode selection switch so that each contact of said electromagnetic relay is in an ON state when said control modes is the power generation mode and in an OFF state when said control mode is the vehicle driving mode.

5. The vehicle-mounted power generator set according to claim 4, wherein said controller comprises overvoltage protection relay control means for controlling to open the contact of said electromagnetic relay when the rotational speed of said engine exceeds a predetermined set speed with the control mode being switched to the power generation mode in order to prevent an overvoltage from being applied from said AC generator to said electric power conversion portion.

6. The vehicle-mounted power generator set according to claim 4, wherein said controller comprises overvoltage protection relay control means for controlling to open the contact of said electromagnetic relay when an output voltage of said generator exceeds a predetermined set voltage with the control mode being switched to the power generation mode in order to prevent an overvoltage from being applied from said AC generator to said electric power conversion portion.

7. The vehicle-mounted power generator set according to claim 4, wherein said controller comprises overspeed protection control means for controlling to stop at least either an ignition operation of said engine or supply of fuel to said engine when the rotational speed of said engine exceeds a predetermined set speed with the control mode being switched to the power generation mode to limit the rotational speed of said engine to said set speed or less in order to prevent an overvoltage from being applied from said AC generator to said electric power conversion portion.

8. The vehicle-mounted power generator set according to claim 4, wherein said controller comprises overvoltage protection control means for controlling to stop at least either an ignition operation of said engine or supply of fuel to said engine when an output voltage of said AC generator exceeds a predetermined set voltage with the control mode being switched to the power generation mode to reduce the rotational speed of said engine and limit an output voltage of said AC generator to said set voltage or less in order to prevent an overvoltage from being applied from said AC generator to said electric power conversion portion.