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Electronics --- PIC (peripheral interface controller) --- elektronica

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Modern vehicles use Electronic Control Units (ECU),
connected via Controller Area Network (CAN) to perform
functions. Many of these functions are distributed across
several ECUs. This network interconnection enables the
sharing of sensors, calculated information and actuators.
As new functionality is added, the number of ECUs and
their complexity increase. 

This paper describes the values and possibilities of a
Hardware-In-the-Loop (HIL) based Integration Lab,
which enables a wide range of automatic tests to be
performed on networked ECUs. 

The Integration Lab is the complex rebuild of a Scania
truck/bus, containing the ECU superset, for connecting
and testing networked ECUs. It involves more than 30
ECUs and eleven CAN networks.

Motorcars engineering --- CAN (controller area network) --- auto's

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The increase in the number of electronic control units (ECUs)
in the modern vehicle, combined with increased software
complexity and more distributed controls has led to an
extreme testing challenge when it comes to the verification
and validation of body-control ECUs. In general test
engineers have to deal with more software configurations,
more closed-loop interaction between ECUs, and more fault
conditions than ever before. 

By adding Unified Diagnostic Services (UDS) over CAN to a
Hardware-In-The-Loop (HIL) test system, Lear was able to
increase test automation and provide wider test coverage by
automating the ECU flashing process, adding diagnostic
identifiers and trouble codes to their test scripts, and
providing a quick and easy way to exercise ECU I/O. 


Lear chose to implement their HIL testers on the open PXI[1]
hardware platform, utilizing National Instruments' VeriStand
software framework. A main reason for selecting NI
VeriStand was the ability to add custom functionality using
NI LabVIEW, allowing Lear to integrate hardware from
multiple vendors and add support for UDS (ISO-14229.1) 

This paper will discuss in detail the process for automating
ECU flashing and including diagnostic data for more
comprehensive test scripts, as well as the implementation of
the Unified Diagnostic Services via the Automotive
Diagnostic Command Set for LabVIEW.

Motorcars engineering --- CAN (controller area network) --- Labview (informatica) --- auto's

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Modern vehicles have electronic control units (ECUs) to control various subsystems such as the engine, brakes, steering, air conditioning, and infotainment. These ECUs (or simply 'controllers') are networked together to share information, and output directly measured and calculated data to each other. This in-vehicle network is a data goldmine for improved maintenance, measuring vehicle performance and its subsystems, fleet management, warranty and legal issues, reliability, durability, and accident reconstruction. The focus of Data Acquisition from HD Vehicles Using J1939 CAN Bus is to guide the reader on how to acquire and correctly interpret data from the in-vehicle network of heavy-duty (HD) vehicles. The reader will learn how to convert messages to scaled engineering parameters, and how to determine the available parameters on HD vehicles, along with their accuracy and update rate. Written by two specialists in this field, Richard (Rick) P. Walter and Eric P. Walter, principals at HEM Data, located in the United States, the book provides a unique road map for the data acquisition user. The authors give a clear and concise description of the CAN protocol plus a review of all 19 parts of the SAE International J1939 standard family. Pertinent standards are illuminated with tables, graphs and examples. Practical applications covered are calculating fuel economy, duty cycle analysis, and capturing intermittent faults. A comparison is made of various diagnostic approaches including OBD-II, HD-OBD and World Wide Harmonized (WWH) OBD. Data Acquisition from HD Vehicles Using J1939 CAN Bus is a must-have reference for those interested to acquire data effectively from the SAE J1939 equipped vehicles.


Motorcars engineering --- remmen --- CAN (controller area network) --- OBD (on-board diagnostics) --- airconditioning --- auto's --- data acquisition

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Hardware-in-the-loop (HIL) testing is used by
commercial vehicle original equipment manufacturers
(OEMs) in several fields of electronics development. HIL
tests are a part of the standard development process for
engine and machine control systems. For electronic
control units (ECUs), not only the HIL test of the
hardware but also the controller software validation is
very important. For hardware diagnostics validation, a
dynamic simulation of the real system could be omitted
and an open-loop test of the controller is sufficient in
most cases. For most controller software validation
including OBD (on-board diagnosis) tests, detailed but
real-time capable models have to be used. 

This article describes the needs and challenges of
models in hardware-in-the-loop (HIL) based testing,
taking into account the wide range of commercial and
off-highway vehicles. Starting with the commonalities
and differences in applications it lists the model
requirements and different approaches in modeling for
closed-loop HIL testing to help to find the most suitable
models for the HIL application. Finally a comparison of
testing and development between HIL and other testing
areas is provided.

Motorcars engineering --- CAN (controller area network) --- OBD (on-board diagnostics) --- auto's