PrototypeECUWithCRIO

Transcript PrototypeECUWithCRIO

Rapid Prototyping Automotive ECUs with CompactRIO (cRIO) and PXI

Carroll G. Dase President, Drivven, Inc.

cRIO and PXI ECU Prototyping Platforms

• CompactRIO (cRIO) – Compact, rugged features – 200 – 400 MHz CPUs – Up to 512 Mb Flash / 128 Mb RAM – 1M or 3M gate FPGA • PXI – Multi GHz CPUs – Multi Gb memories, large hard drives – Many I/O card types, including FPGA

Why a cRIO / PXI ECU?

• Full-authority engine, vehicle and test cell control within single system • Perform R&D or component testing with OEM engines • Rapidly prototype control and DAQ systems for concept engines • Using OEM ECUs for R&D or testing requires expensive / lengthy original design team support and coordination

Why a cRIO / PXI ECU?

• Develop experimental algorithms which OEM ECUs cannot execute • LabVIEW graphical programming environment is easy to use • Assemble unique combinations of I/O not possible with OEM ECUs • Sophisticated data acquisition synchronized with control within single hardware / software platform

How is a cRIO / PXI ECU Possible?

• National Instruments’ Open hardware/software architecture for cRIO I/O modules

How is a cRIO / PXI ECU Possible?

• Drivven’s expertise with developing research and production engine control systems

How is a cRIO / PXI ECU Possible?

• Drivven’s line of cRIO modules designed specifically for direct automotive sensor and actuator interface – available commercially-off-the-shelf

Drivven Automotive cRIO Modules

• ADCombo Module Kit: – 21-Ch. automotive-style analog inputs, 12-bit, 4 kS/s per channel – 2-Ch. VR sensor inputs, 200mV – 150V – 2-Ch. Hall-effect sensor inputs • VR/Hall Module Kit – 6-Ch. VR or Hall-effect sensor inputs – Individually software selectable as VR or Hall

Drivven Automotive cRIO Modules

• Port Fuel Injector Driver Module Kit – 4-Ch. Low/high impedance port fuel injector drivers – 4-Ch. General purpose solenoid drivers (0-100% duty cycle) – Short/open circuit diagnostics and protection • Spark Driver Module Kit – 8-Ch. Inductive ignition coil drivers – Short circuit and thermal protection

Drivven Automotive cRIO Modules

• GDI / Common Rail Diesel Injector Driver Module Kit – Internal boost power supply up to 150 V – 3-Ch., configurable peak (30 A) / hold (12 A) injector drivers – Short/open circuit diagnostics and thermal protection • Electronic Throttle Driver Module Kit – 2-Ch., Electronic throttle drivers – Short circuit and thermal protection

Drivven Automotive cRIO Modules

• O2 Sensor Module Kit – 2-Ch. wide-band Bosch LSU-4.2 oxygen sensor controllers – 4-Ch. narrow-band Oxygen sensor inputs – Sensor diagnostics and short circuit protection – Add custom calibration for specialized fuels • Low Side Driver Module Kit – 8-Ch. General purpose solenoid drivers (0-100% duty cycle) – Short/open circuit diagnostics and protection – Software option for 0-2A solenoid current control

Drivven EPT VIs

• Engine Position Tracking (EPT) VIs – Track angular position of crankshaft to sub-degree resolution – Supports most common trigger patterns in the industry • N-M (example: 60-2) • Plus 1 (example: 6+1) • Encoder (example 360 count optical encoder) • Chrysler 36-4 – Use to internally simulate crank/cam patterns for easy bench testing during application development – Drivven can quickly develop EPT for custom patterns

Using Drivven Products

• Common interface between EPT VIs and engine synchronous output module kits • Module FPGA and RT software handles precise timing of fuel/spark outputs so that researchers only program in terms of engineering units (msec, crank-angle degrees, frequency, duty cycle, etc.)

Using Drivven Products

• Growing engine control application template base – Open source LabVIEW applications – Open source engine control algorithms – Develop custom engine control application in days, not months • Turn-key solutions, so powertrain engineers can focus on their research without getting side-tracked by efforts to get an engine under control

Drivven Online

Where to Start?

• Determine control / DAQ requirements and select: – CompactRIO?

– PXI?

• Gather engine I/O requirements – Crank/cam sensors, pressure sensors, thermistors, switches, potentiometers, battery-level voltages, O2, etc.

– Fuel injectors, ignition coils, pressure regulator, EGR valve, throttle, wastegate, etc.

Where to Start?

• Does baseline calibration data exist for this engine? If not… – OEM ECU mapping is possible with Drivven / NI products – Collect and analyze data (Drivven has examples) – Format data for control use (Drivven has example) • Wiring harness – OEM or custom?

– Spare OEM ECUs are handy for harness connection points – Wiring and connector decisions play big role in project success

Examples

• CompactRIO installation example

Examples

• Yamaha YZFR6 Wiring Example

Examples

• John Deere lean, split-engine control strategy

Examples

• Turbo-charged motorcycle development for Formula SAE