scholarly journals The Recuperated Split Cycle - Experimental Combustion Data from a Single Cylinder Test Rig

2017 ◽  
Vol 10 (5) ◽  
pp. 2596-2605 ◽  
Author(s):  
Robert E. Morgan ◽  
Neville Jackson ◽  
Andrew Atkins ◽  
Guangyu dong ◽  
Morgan Heikal ◽  
...  
Keyword(s):  
Test Rig ◽  
Single Cylinder ◽  
Cylinder Test ◽  
Experimental Combustion

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.

scholarly journals Hydrogen piston engines: R&D, experiences

2006 ◽  
Vol 125 (2) ◽  
pp. 28-36
Author(s):  
Zdenek KOVAR ◽  
Celestyn SCHOLZ ◽  
Stanislav BEROUN ◽  
Milan NYDRLE ◽  
Hynek DROZDA ◽  
...  
Keyword(s):  
Single Cylinder ◽  
Fuel Ratio ◽  
Cylinder Test ◽  
Test Engine ◽  
Hydrogen Mixtures ◽  
Experimental Works

Results of experimental works on hydrogen testing engines are presented in the paper: mixture forming, burning of air-hydrogen mixtures with different air/fuel ratio, NOx production, power parameters. The R&D works were realized on a single cylinder test engine (both natural aspirated and supercharged) and on a turbocharged six cylinder test engine as well.

The New AVL Medium Speed Single Cylinder Engine

2003 ◽  
Author(s):  
Wolfgang H. Kling ◽  
Wilhelm Greylinger
Keyword(s):  
Fuel Injection ◽  
Low Cost ◽  
Analytical Techniques ◽  
Customer Requirements ◽  
Single Cylinder ◽  
Cylinder Test ◽  
Engine Design ◽  
Medium Speed ◽  
Base Engine ◽  
History Of

For many years engine researchers and development specialists have appreciated the benefits offered by performing engine development and testing on Single Cylinder Engines (SCEs). The SCE essentially isolates the cylinder, providing a powerful tool for detailed combustion research, while mitigating the possibility of misleading data results due to cylinder-to-cylinder interactions. Single Cylinder Engines also offer increased accessibility to key components, allowing for rapid changes, thereby expediting the testing process. Furthermore, SCE testing becomes a practical necessity for large engines with bores greater than 150 mm, where a very large multi-cylinder engine installation becomes very facility limited and impractical. AVL has a long history of design and development of engines in the medium speed range. In addition to well-proven analytical techniques AVL has developed a number of Single Cylinder Engines for testing to support both internally-funded and customer-supported research programs. Since individual customer requirements for single cylinder research may vary considerably, SCEs have typically been unique builds, designed, structurally validated, machined and assembled from “the ground up.” Whilst this approach usually results in a final product which meets the customer’s needs, it is costly, extremely time consuming, prone to numerous design iterations and is often inapplicable for other engine design applications. In seeking a solution to this problem, AVL has come up with an approach which results in an SCE which is quickly, yet inexpensively developed and built. It is durable yet adaptable to specific customer requirements. AVL’s approach has been to develop a successful base engine platform for medium speed single cylinder test engines, and then modify the unit as necessary to meet customer requirements using the customer-provided power cylinder, fuel injection equipment (FIE) and other “upper end” components. This approach results in a robust, reliable, proven design at low cost, which will meet specific customer research needs for many years.

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