ELECTRONIC CONTROL UNIT

• US 20130099742A1
• Filed: 10/18/2012
• Published: 04/25/2013
• Est. Priority Date: 10/21/2011
• Status: Active Grant

• Current Assignee: Hitachi Astemo Ltd. (Hitachi, Ltd.)
• Original Assignee: Keihin Corporation (Hitachi, Ltd.), Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: YAMADA, Takeshi, UMEYA, Haruki, DAIBO, Shinichi, TAKASHIMA, Yuzuru, TANNO, Masaki
• Granted Patent: US 9,533,578 B2
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: B60L 3/04 Cutting off the power supply under fault conditions protective devices and circuit arrangements in general H01H; H02H
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

An electronic control unit includes a processor performing a process necessary for a charging control based on a pilot signal, an input circuit disposed in a stage preceding an input port of the processor, and a pseudo-signal supply circuit supplying a pseudo-pilot signal to a pilot signal line under the control of the processor, and the processor performs a malfunction diagnosis for the input circuit based on a signal state of the input port when controlling the pseudo-signal supply circuit to supply the pseudo-pilot signal to the pilot signal line.

Claims

1. An electronic control unit that is mounted on a vehicle which is configured to be charged with an external power supply and that receives a pilot signal via a charging cable before being supplied with a power when the vehicle is connected to the external power supply via the charging cable, the electronic control unit comprising:

a processor that performs a process necessary for a charging control based on the pilot signal;

an input circuit that is disposed in a stage preceding an input port of the processor; and

a pseudo-signal supply circuit that supplies a pseudo-pilot signal to a pilot signal line extending from a pilot signal input terminal of the electronic control unit to the input circuit under control of the processor,

wherein the processor performs a malfunction diagnosis for the input circuit based on a signal state of the input port when controlling the pseudo-signal supply circuit to supply the pseudo-pilot signal to the pilot signal line.

2. The electronic control unit according to claim 1, wherein the input port includes an interrupt port used to input a start-up factor interrupt signal serving as a start-up factor of the processor,

wherein the input circuit includes a circuit that generates the start-up factor interrupt signal and outputs the generated start-up factor interrupt signal to the interrupt port when a pulse-like pilot signal is input via the pilot signal line, and

wherein the processor performs the malfunction diagnosis for the input circuit based on the signal state of the interrupt port when controlling the pseudo-signal supply circuit to supply a pulse-like pseudo-pilot signal to the pilot signal line.

3. The electronic control unit according to claim 1, wherein the input port includes an interrupt port used to input a start-up factor interrupt signal serving as a start-up factor of the processor and a duty measurement port used to measure a duty ratio of the pilot signal,

wherein the input circuit includes a circuit that generates the start-up factor interrupt signal and outputs the generated start-up factor interrupt signal to the interrupt port when a pulse-like pilot signal is input via the pilot signal line and that buffers the pilot signal and outputs the buffered pilot signal to the duty measurement port, and

wherein the processor performs the malfunction diagnosis for the input circuit based on the signal states of the interrupt port and the duty measurement port when controlling the pseudo-signal supply circuit to supply a pulse-like pseudo-pilot signal to the pilot signal line.

4. The electronic control unit according to claim 1, wherein the processor performs the malfunction diagnosis for the input circuit when the charging cable is not connected to the vehicle.