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.

scholarly journals R & D Using Single Cylinder Test Engine MTE40

2010 ◽  
Vol 45 (6) ◽  
pp. 848-853
Author(s):  
Sumito Yokobe ◽  
Morio Kondo
Keyword(s):  
Single Cylinder ◽  
Cylinder Test ◽  
Test Engine

Development of a High Temperature Tribological Lubricant for Low Heat Rejection High Temperature Operation Diesel Engines

2005 ◽  
Author(s):  
Philipe Saad ◽  
Lloyd Kamo ◽  
Milad Mekari ◽  
Walter Bryzik
Keyword(s):  
High Temperature ◽  
Test Data ◽  
Test Bench ◽  
Cooling System ◽  
Heat Rejection ◽  
Single Cylinder ◽  
Cylinder Test ◽  
Test Engine ◽  
High Temperature Operation ◽  
Thickness Shear

Adiabatics INC. with the support of U.S. Army Tank Automotive and Armaments Command has developed a new high temperature lubricant with additives package to work under the rigid regime of advanced Low Heat Rejection (LHR) diesel engine operating parameters. Using the newly developed high temperature lubricant on a laboratory tribology test bench and on a single cylinder LHR engine, the Army specified requirements of 410 °C Top Ring Reversal (TRR), 175 °C sump temperatures, and friction coefficient of 0.085–0.10 have been met. We have used the test data generated from the laboratory tribology test bench, and the LHR single cylinder test engine to validate the eight tribology performance parameters. The eight tribology parameters are: Oil Film thickness, shear stress, shear rate, temperature, effective viscosity, wear, specific friction work, and contact stress. Also this paper includes test data for the newly designed lubricating and cooling system. Further testing will be conducted on a multi cylinder production engine to complete the validation process of the newly developed lubricant and the lubricating and cooling system.

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.

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