Electronic control module with driver banks for engines

• US 9,541,022 B2
• Filed: 04/28/2014
• Issued: 01/10/2017
• Est. Priority Date: 04/28/2014
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Hoban, William E. Jr., Paduret, Ioan, Siegle, James D.
• Primary Examiner(s): MOULIS, THOMAS N
• Application Number:
  US14/263,051
• Publication Number:
  US 20150308399A1
• Time in Patent Office: 988 Days
• Field of Search: 123/406.65, 123/406.66, 123/406.6, 123/406.12, 123/406.2, 701/101, 701/102, 701/103
• US Class Current: 1/1
• CPC Class Codes: F02D 2041/2003 using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
• CPC Class Codes: F02D 2041/2082 the circuit being adapted to distribute current between different actuators or recuperate energy from actuators
• CPC Class Codes: F02D 41/20 Output circuits, e.g. for controlling currents in command coils
• CPC Class Codes: F02D 41/28 Interface circuits
• CPC Class Codes: F02P 3/02 having inductive energy storage, e.g. arrangements of induction coils ignition coils structurally combined with sparking plugs F02P13/00; constructional details of ignition coils H01F38/12
• CPC Class Codes: F02P 5/045 combined with electronic control of other engine functions, e.g. fuel injection in general F02D37/02
• CPC Class Codes: F02P 5/1502 using one central computing unit
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

An engine control module (ECM) having a plurality of driver banks is provided. Each of the driver banks is configured to drive a plurality of combustion control elements. The driver banks include two low side driver circuits and a high side driver circuit, the high side driver circuit in each of the plurality of driver banks being shared pairwise by two combustion control elements. Each one of said at least two low side driver circuits is respectively associated with the two combustion control elements. The ECM includes a field programmable gate array (FPGA) coupled to the plurality of driver banks and configured to provide firing signals to at least twelve high side driver circuits to simultaneously drive at least twelve combustion control elements respectively coupled to the at least twelve high side driver circuits.

Claims

1. An engine control module (ECM) comprising:

a plurality of driver banks configured to drive a plurality of combustion control elements, each of the plurality of driver banks including two low side driver circuits and a high side driver circuit, the high side driver circuit in each of the plurality of driver banks being shared pairwise by two combustion control elements in the plurality of combustion control elements, and each one of said at least two low side driver circuits being respectively associated with the two combustion control elements; and

a field programmable gate array (FPGA) coupled to the plurality of driver banks and configured to provide firing signals to at least twelve high side driver circuits to simultaneously drive at least twelve combustion control elements respectively coupled to the at least twelve high side driver circuits, said at least twelve combustion control elements being enabled by the respective low side driver circuits coupled to each of the at least twelve combustion control elements.

2. The engine control module of claim 1, wherein the FPGA is configured to provide the firing signals to simultaneously drive up to twenty four combustion control elements.

3. The engine control module of claim 1, wherein, for each driver bank, the high side driver circuit in the driver bank includes at least two field effect transistors (FETs), one of said at least two FETs providing a boost voltage source and the other of said two FETs providing a battery voltage source to at least one combustion control element coupled to an output of the high side driver circuit.

4. The engine control module of claim 3, wherein the high side driver circuit in the driver bank includes at least three FETs, a third FET being coupled to the other of said two FETs providing the battery voltage source, an output of said third FET being coupled to the output of the high side driver circuit.

5. The engine control module of claim 1, wherein the plurality of combustion control elements comprise at least one of the following:

an injector and an ignition coil.

6. The engine control module of claim 1, wherein the firing signals provided by the FPGA are logic level signals.

7. The engine control module of claim 1, for each driver bank in the plurality of driver banks, the high side driver circuit includes an overcurrent protection circuit.

8. The engine control module of claim 1, wherein, an output of the high side driver circuit is configured to drive the two combustion control elements coupled to the high side driver circuit over an engine crank angle of 0°

-360°

.

9. The engine control module of claim 1, for each driver bank, wherein at least one of the low side driver circuits includes an overcurrent protection circuit.

10. A vehicle comprising the ECM of claim 1 and further comprising:

an engine; and

a plurality of combustion control elements.

11. A method for controlling fuel combustion in an engine using an engine controller module (ECM), the method comprising:

providing, in the ECM, a plurality of driver banks each including two low side driver circuits and a high side driver circuit, and each driver bank being coupled to two combustion control elements of the engine;

providing a field programmable gate array (FPGA) coupled to the plurality of driver banks; and

providing a plurality of firing signals simultaneously from the FPGA to at least twelve high side driver circuits to simultaneously drive twenty four combustion control elements respectively coupled to the at least twelve high side driver circuits to control fuel combustion in the engine, each said twenty four combustion control elements being enabled by the respective low side driver circuits coupled to each of the twenty four combustion control elements.

12. The method of claim 11 further comprising:

outputting an output signal from the high side driver circuit, said output signal having at least two levels to control the one or more combustion control elements, based upon the firing signals received from the FPGA.

13. The method of claim 11, wherein the firing signals are provided for controlling at least two field effect transistors (FETs) in the high side driver circuit, one of said at least two FETs providing a boost voltage source and the other of said two FETs providing a battery voltage source to at least one combustion control element coupled to an output of the high side driver circuit.

14. The method of claim 13, wherein the firing signals are provided for controlling at least three FETs, a third FET being coupled to the other of said two FETs providing the battery voltage source, an output of said third FET being coupled to the output of the high side driver circuit.

15. The method of claim 11 further comprising:

controlling the combustion control elements over an engine crank angle of 0°

-360°

.

16. The method of claim 11, wherein, the firing signals provided by the FPGA are logic level signals.

17. An engine control module (ECM) comprising:

a plurality of driver banks configured to drive a plurality of combustion control elements, each of the plurality of driver banks including two low side driver circuits and a high side driver circuit, the high side driver circuit in each of the plurality of driver banks being shared pairwise by two combustion control elements in the plurality of combustion control elements, and each one of said at least two low side driver circuits being respectively associated with the two combustion control elements; and

a programmable logic device (PLD) coupled to the plurality of driver banks and configured to provide firing signals to at least twelve high side driver circuits to simultaneously drive at least twelve combustion control elements respectively coupled to the at least twelve high side driver circuits, said at least twelve combustion control elements being enabled by the respective low side driver circuits coupled to each of the at least twelve combustion control elements, wherein the plurality of combustion control elements comprise at least one of the following;

an injector and an ignition coil.

18. The engine control module of claim 17, wherein, for each driver bank, the high side driver circuit includes at least one input line coupled to the PLD and coupled to receive a firing signal from the PLD, and at least one output line configured to provide an output signal to the combustion control element coupled to the high side driver circuit in response to the firing signal.

19. The engine control module of claim 18, wherein, for each driver bank, the high side driver includes a boost voltage source and a battery voltage source, wherein the at least one output line is configured to provide the output signal including at least one of a boost voltage and a battery voltage outputted by the boost voltage source and the battery voltage source, respectively, to the combustion control element.

20. A vehicle comprising the ECM of claim 17 and further comprising:

an engine; and

a plurality of combustion control elements.