A Transient Single Cylinder Test System for Engine Research and Control Development

2005 ◽  
Author(s):  
John L. Lahti ◽  
Matthew W. Snyder ◽  
John J. Moskwa
Keyword(s):  
Test System ◽  
Intake Manifold ◽  
Test Accuracy ◽  
Test Configuration ◽  
Single Cylinder ◽  
Cylinder Test ◽  
Single Cylinder Engine ◽  
Wide Range ◽  
Reduce Development Time ◽  
High Bandwidth

A transient test system was developed for a single cylinder research engine that greatly improves test accuracy by allowing the single cylinder to operate as though it were part of a multi-cylinder engine. The system contains two unique test components: a high bandwidth transient hydrostatic dynamometer, and an intake airflow simulator. The high bandwidth dynamometer is used to produce a speed trajectory for the single cylinder engine that is equivalent to that produced by a multi-cylinder engine. The dynamometer has high torque capacity and low inertia allowing it to simulate the speed ripple of a multi-cylinder engine while the single cylinder engine is firing. Hardware in loop models of the drivetrain and other components can be used to test the engine as though it were part of a complete vehicle, allowing standardized emissions tests to be run. The intake airflow simulator is a specialized intake manifold that uses solenoid air valves and a vacuum pump to draw air from the manifold plenum in a manner that simulates flow to other engine cylinders, which are not present in the single cylinder test configuration. By regulating this flow from the intake manifold, the pressure in the manifold and the flow through the induction system are nearly identical to that of the multi-cylinder application. The intake airflow simulator allows the intake runner wave dynamics to be more representative of the intended multi-cylinder application because the appropriate pressure trajectory is maintained in the intake manifold plenum throughout the engine cycle. The system is ideally suited for engine control development because an actual engine cylinder is used along with a test system capable of generating a wide range of transient test conditions. The ability to perform transient tests with a single cylinder engine may open up new areas of research exploring combustion and flow under transient conditions. The system can also be used for testing the engine under conditions such as cylinder deactivation, fuel cut-off, and engine restart. The improved rotational dynamics and improved intake manifold dynamics of the test system allow the single cylinder engine to be used for control development and emissions testing early in the engine development process. This can reduce development time and cost because it allows hardware problems to be identified before building more expensive multi-cylinder engines.

A Transient Hydrostatic Dynamometer for Single Cylinder Engine Research With Real Time Multi-Cylinder Dynamic Simulation

2003 ◽  
Author(s):  
John L. Lahti ◽  
Steven J. Andrasko ◽  
John J. Moskwa
Keyword(s):  
Low Cost ◽  
Test System ◽  
Engine Operation ◽  
Single Cylinder ◽  
Driving Cycles ◽  
Vehicle Load ◽  
Single Cylinder Engine ◽  
High Bandwidth ◽  
State Regime ◽  
Dynamometer Test

A new high-bandwidth transient hydrostatic dynamometer test system has been developed that accurately replicates multi-cylinder engine operation using a single-cylinder research engine. Single-cylinder engines are typically used for research because of their low cost and good cylinder accessibility for instrumentation and optics. This dynamometer maintains these advantages while dramatically improving transient and low speed testing capabilities. The system also incorporates hardware-in-the-loop models for simulation of other components that would typically be present in a vehicle application. These models include: adjoining cylinders and ancillary components in the engine, the transmission, driveline, and vehicle load. Utilizing these models it is possible to replicate actual driving cycles. This high-bandwidth transient dynamometer extends the test capabilities of single-cylinder research far beyond the traditional steady state regime, enabling transient speed single-cylinder engine research while providing single-cylinder engine operation that is comparable to the multi-cylinder engine.

Engine Start Simulation on an Engine Transient Test System: Hardware and Controls

2007 ◽  
Author(s):  
Brian D. Krosschell ◽  
Stephen J. Klick ◽  
John J. Moskwa
Keyword(s):  
Cold Start ◽  
Testing Procedure ◽  
Test System ◽  
Stiff System ◽  
Powertrain Control ◽  
Single Cylinder Engine ◽  
Control Research ◽  
High Bandwidth ◽  
Very High ◽  
Engine Start

The goal of this research is to use a hydrostatic transient dynamometer combined with new control techniques to replicate multi-cylinder engine dynamics which occur while the engine is started by an electric starting system. The transient engine dynamometer test system in the Powertrain Control Research Laboratory (PCRL) uses a torque tube and extremely stiff driveline in order to provide a very high bandwidth of torque actuation. The design and nature of this low inertia, stiff system requires that a standard electrical starting system be omitted. One of the objectives of this research was to assemble a new engine on the hydrostatic dynamometer and model the starting dynamics which occur during an engine cold start. The other objective was to verify and compare data collected by the PCRL and Ford to validate testing. This information will then be used in support of development of a cold start testing procedure on the single-cylinder engine transient test system in the PCRL.

Design of a New Intake Manifold of a Single Cylinder Engine with Three Stages

2017 ◽  
Author(s):  
Luiz Otávio F. T. Alves ◽  
Marcos Gabriel Diodato dos Santos ◽  
Alexandre Barreto Urquiza ◽  
Jorge Henriquez Guerrero ◽  
José Claudino de Lira ◽  
...  
Keyword(s):  
Intake Manifold ◽  
Single Cylinder ◽  
Single Cylinder Engine ◽  
Three Stages

Comparison of Numerical and System Dynamics Methods for Modeling Wave Propagation in the Intake Manifold of a Single-Cylinder Engine

2013 ◽  
Author(s):  
Stephanie Stockar ◽  
Marcello Canova ◽  
Yann Guezennec ◽  
Augusto Della Torre ◽  
Gianluca Montenegro ◽  
...  
Keyword(s):  
Wave Propagation ◽  
System Dynamics ◽  
Intake Manifold ◽  
Single Cylinder ◽  
Single Cylinder Engine

Advanced Diesel Combustion Using of Wide Range, High Boosted and Cooled EGR System by Single Cylinder Engine

2006 ◽  
Author(s):  
Yuzo Aoyagi ◽  
Hideaki Osada ◽  
Masahiro Misawa ◽  
Yuichi Goto ◽  
Hajime Ishii
Keyword(s):  
Diesel Combustion ◽  
Single Cylinder ◽  
Single Cylinder Engine ◽  
Wide Range

IC Engine Transient Heat Transfer System Hardware and Simulation

2007 ◽  
Author(s):  
Stephen J. Klick ◽  
Brian Krosschell ◽  
John J. Moskwa
Keyword(s):  
Heat Transfer ◽  
Control Strategies ◽  
Test System ◽  
Transient Heat Transfer ◽  
Intake Manifold ◽  
Ic Engine ◽  
Loop Control ◽  
Single Cylinder ◽  
Powertrain Control ◽  
Control Research

One of the ongoing goals of the Powertrain Control Research Laboratory (PCRL) at University of Wisconsin-Madison is to expand the capabilities of the single-cylinder internal combustion research engine by bringing its operation closer to that of its multi-cylinder counterpart. The PCRL has already replicated the rotational dynamics and intake manifold dynamics of a multi-cylinder engine on a single-cylinder research engine. This paper covers the development of an addition to the single-cylinder test system that will allow the replication of transient heat transfer that normally occurs in a multi-cylinder engine from the engine to the coolant. This system will include physical hardware as well as real time hardware-in-the-loop control strategies using MATLAB/Simulink and dSPACE software.

Control of the Intake Air Dynamics on a Single-Cylinder Engine, to Replicate Multi-Cylinder Engine Dynamics

2015 ◽  
Author(s):  
John J. Moskwa ◽  
Mark B. Murphy
Keyword(s):  
Heat Transfer ◽  
Gas Dynamics ◽  
Test System ◽  
Charge Motion ◽  
Single Cylinder ◽  
Powertrain Control ◽  
University Of Wisconsin ◽  
Single Cylinder Engine ◽  
Control Research ◽  
Significant Step

Single-cylinder test engines are used extensively in engine research, and sparingly in engine development, as an inexpensive way to test or evaluate new concepts or to understand in-cylinder motion or combustion. They also allow good access to the cylinder for instrumentation, however, these single-cylinder engines differ significantly in rotational dynamics, gas intake dynamics, heat transfer dynamics, dynamic coupling between cylinders, and in other areas. Charge motion within the cylinder, even during the closed period differs from the multi-cylinder engine because of the differences in both instantaneous flow and momentum. Researchers in the Powertrain Control Research Laboratory (PCRL) at the University of Wisconsin-Madison have developed single-cylinder engine transient test systems that control the instantaneous dynamic cylinder boundary conditions to replicate those in the target multi-cylinder engine. The overall goal is to exploit the benefits of the single-cylinder engine, while eliminating the negative aspects of this device, and to have the single-cylinder “think” it is dynamically operating within a multi-cylinder engine. This paper describes the latest developments in controlling the intake gas dynamics of the single-cylinder engine to meet these goals. A combination of both rotary and proportional valves are used to accurately replicate the instantaneous intake airflow that exists in the multi-cylinder engine, including during transients. A Fourier-based approach instead of the previous time-based trajectory control is used to accomplish these goals. This is a third generation of intake air simulator (IAS3) that is a significant step forward in both simplifying the system, and in significantly expanding the operating envelop of the engine to include the full engine operating range of the multi-cylinder engine. A brief introduction of the entire transient test system will show the reader how rotational, heat transfer, and gas dynamics are controlled, and how the IAS3 fits into this overall system.

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