Injector driver and method of controlling the same

Patent metadata

Field	Value
Publication number	US-9458788-B2
Application number	US-201414198953-A
Country	US
Kind code	B2
Filing date	Mar 6, 2014
Priority date	Dec 19, 2013
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

An injector driver and a method of controlling the injector driver are provided. A defect of a driving channel is detected by enabling an identification of safety inspection for each channel in a driving semiconductor during an idle mode. The injector driver includes a plurality of driving switches that operate an injector and a driving semiconductor that drives of the driving switches. In addition, the driving semiconductor determines a short defect of the injector during an idle mode and detects and stores the defective short in a channel unit.

First claim

What is claimed is:

1. An injector driver, comprising:
a plurality of driving switches configured to operate an injector; and
a driving semiconductor configured to:
drive the driving switches;
determine a short defect of the injector during an idle mode; and
detect and store the defective short in a channel unit,

wherein the driving semiconductor includes a controller configured to:
monitor a connection node short between the driving switches and the injector;
store the monitored connection node short in a register; and
read information stored in the register to determine a short defect location of the injector.

2. The injector driver according to claim 1 , wherein the controller is further configured to:
read the information stored in the register and transmit the read information to an external micro control unit.

3. The injector driver according to claim 1 , wherein the driving semiconductor further includes:
a driving unit configured to selectively operate the driving switches.

4. The injector driver according to claim 3 , wherein the controller is configured to operate the driving unit to selectively turn on the driving switches.

5. The injector driver according to claim 1 , wherein the controller is further configured to:
detect a short between the driving switches located at a power supply voltage side among the driving switches and the injector; and
detect a short between the driving switches located at a reference voltage side among the driving switches and the injector.

6. The injector driver according to claim 5 , wherein the controller is further configured to:
compare an output voltage between a high voltage applying terminal and the injector; and
compare an output voltage between a power supply voltage applying terminal and the injector.

7. The injector driver according to claim 5 , wherein the controller is further configured to:
compare an output voltage between a ground voltage terminal and a first injector; and
compare an output voltage between the ground voltage terminal and a second injector.

8. An injector driver, comprising:
a plurality of driving switches configured to operate an injector; and
a controller having configured to
drive the driving switches;
determine a short defect of the injector during an idle mode;
detect the defective short in a channel unit;
store the detected defective short in a register;
read information stored in the register to determine a short defect location of the injector;
detect a short between the driving switches located at a power supply voltage side among the driving switches and the injector; and
detect a short between the driving switches located at a reference voltage side among the driving switches and the injector.

9. The injector driver according to claim 8 , wherein the controller is further configured to:
read the information stored in the register; and
transmit the read information to an external micro control unit.

10. The injector driver according to claim 8 , further comprising:
a driving unit configured to selectively operate the driving switches.

11. The injector driver of claim 10 , wherein the controller is configured to operate the driving unit to selectively turn on the driving switches.

12. The injector driver according to claim 8 , wherein the controller is further configured to:
compare an output voltage between a high voltage applying terminal and the injector; and
compare an output voltage between a power supply voltage applying terminal and the injector.

13. The injector driver according to claim 8 , wherein the controller is further configured to:
compare an output voltage between a ground voltage terminal and a first injector; and
compare an output voltage between the ground voltage terminal and a second injector.

14. A method of controlling an injector driver, comprising:
driving, by a controller, a plurality of driving switches configured to operate an injector;
determining, by the controller, a short defect of the injector during an idle mode;
detecting, by the controller, the defective short in a channel unit;
storing, by the controller, the detected defective short in a register;
reading, by the controller, information stored in the register to determine a short defect location of the injector;
detecting, by the controller, a short between the driving switches located at a power supply voltage side among the driving switches and the injector; and
detecting, by the controller, a short between the driving switches located at a reference voltage side among the driving switches and the injector.

15. The method of claim 14 , further comprising:
reading, by the controller, the information stored in the register; and
transmitting, by the controller, the read information to an external micro control unit.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Hyundai Autron Company Ltd
• Hyundai Autron Company Ltd

Inventors

• Park Choong Seob
• Lee Ji Haeng
• Cho Kang Hee
• Jang Doo Jin

Classifications

• F02D2041/224

  Diagnosis of the fuel system · CPC title

• F02M21/0293

  Safety devices; Fail-safe measures · CPC title

• F02D2041/2093

  detecting short circuits · CPC title

• F02D41/3005 Primary

  Details not otherwise provided for · CPC title

• Y02T10/40

  Engine management systems · CPC title