The NI Direct Injector Driver System features an NI CompactRIO controller, Drivven Direct Injector (DI) Driver modules, and NI digital input modules. The system can synchronize injector channels with production crank/cam position sensors or research optical encoders. The system will also accept external digital fuel command signals from a production engine controller. The included DI Driver module(s) provide the power electronics necessary to drive high-power solenoid or piezoelectric direct injectors.
NI offers this system in 3-, 6-, 9-, and 12-channel configurations (2, 4, 6, and 8 channels, respectively, when used with piezoelectric direct injectors). The system provides a digital input per channel for directly commanding each injector. The system controller is delivered with a pre-installed feature-rich application. The deployment version of the NI LabVIEW Software Calibration Manager (CalVIEW) is included for interfacing with and calibrating the system. These calibration settings are stored on the CompactRIO controller and used immediately upon system boot. The user interface is accessed by connecting a computer directly to the CompactRIO controller via an Ethernet cable or by putting the NI Direct Injector Driver System on a network. NI LabVIEW development tools are not required, but the free LabVIEW Run-Time Engine is required. Once you have connected a 9 V to 30 V power source and external digital commands, you are ready to connect to your injectors and begin running.
The NI 9215 C Series module option adds analog input channels for any application requiring +/-10 V feedback. This module alone can receive any analog input signal (temperature, pressure, lambda, and so on) to use as feedback to four general-purpose proportional integral derivative (PID) controllers or lookup tables. You can link the PID control and lookup table outputs to a variety of direct injector driver or port fuel injection driver output parameters (injection duration, timing, and so on ).
The Port Fuel Injector (PFI) driver option adds solenoid or valve actuation capabilities to the NI Direct Injector Driver System. Examples include the actuation of engine-synchronous high- or low-impedance port fuel injectors, actuation of PWM-operated (non engine-synchronous) inlet metering valves or high-pressure rail valves on common-rail diesel engines, actuation of electromechanical relays, or actuation of various proportional solenoid valves (hydraulic, pneumatic, and so on).
When used with the Drivven Port Fuel Injection Driver modules, the NI 9215 can function as the rail pressure sensor input for the rail pressure control features of the NI Direct Injector Driver System. The system uses the NI 9215 to measure the rail pressure while using the port fuel injection driver module to conduct PWM on the inlet metering valve and high-pressure valve on the rail with a closed-loop PID algorithm. You can tune the PID gains to suit your system requirements.
The upgrade packages contain all of the additional hardware you need to expand your 3-channel NI Direct Injector Driver System to a 6-, 9-, and 12-channel system. The NI Direct Injector Driver System User Manual contains configuration information for how you should set up each system.