Multi-Cylinder Opposed Piston Transient and Exhaust Temperature Management Test Results

2015 ◽  
Author(s):  
Fabien Redon ◽  
Arunandan Sharma ◽  
John Headley
Keyword(s):  
Temperature Management ◽  
Test Results ◽  
Exhaust Temperature

Evaluation of In-Situ Synthesized Monolithic Metal-MFI/Cordierite Catalysts to Remove NOx From Lean Exhaust

2005 ◽  
Author(s):  
Tianyou Wang ◽  
Shuliang Liu ◽  
Hongjun Xu ◽  
Xing Li ◽  
Maolin Fu ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Gasoline Engine ◽  
Catalytic Reduction ◽  
Space Velocity ◽  
Test Results ◽  
Lean Burn ◽  
Exhaust Temperature ◽  
Nox Conversion ◽  
Nox Conversion Efficiency

In this study, ZSM-5 zeolites were successfully in situ synthesized on the surface of honeycomb cordierite substrate and certified by XRD and SEM techniques. Strong interaction between zeolite and substrate has been found during in-situ synthesis, and hydrothermal stabilities of the zeolites was improved by entailing. The in-situ synthesized monolithic ZSM-5/cordierite showed superior thermal and hydrothermal stabilities. Cu-ZSM-5/cordierite was prepared by ion-exchange and impregnation methods were studied as catalysts for selective catalytic reduction (SCR) of nitrogen oxides (NOx) in a lean-burn gasoline engine. Engine test results show that NOx emission was decreased by reductants of HC and CO in the exhaust gas without any other extra reducing agents. It also exhibited high activities. Using Cu-ZSM-5/cordierite, the maximum NOx conversion efficiency to N2 reached to 64% at the exhaust temperature of 400 °C and the gas hourly space velocity (GHTV) of 25 000/h. Meanwhile, the HC conversion efficiency was about 60%, while CO was little converted. Cu-ZSM-5/cordierite also showed good duration and anti-poison properties. Furthermore, the activated temperature of the Cu-ZSM-5/cordierite was decreased and the NOx conversion was increased via addition of iridium as a modifier.

Exhaust Temperature Management for Diesel Engines Assessment of Engine Concepts and Calibration Strategies with Regard to Fuel Penalty

2011 ◽  
Author(s):  
Sharareh Honardar ◽  
Hartwig Busch ◽  
Thorsten Schnorbus ◽  
Christopher Severin ◽  
Andreas F. Kolbeck ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Temperature Management ◽  
Exhaust Temperature

scholarly journals Remote supervision strategy based on in-use vehicle OBD data flow

2021 ◽  
Vol 268 ◽  
pp. 01007
Author(s):  
Tiantian Wang ◽  
Junjie Liu ◽  
Chuan Wan ◽  
Zhi Wang
Keyword(s):  
Injection System ◽  
Test Results ◽  
Sensor Signal ◽  
Heavy Duty ◽  
T Box ◽  
Remote Supervision ◽  
Exhaust Temperature ◽  
Emission Regulations ◽  
On Line ◽  
The Cost

Test results from many researchers show that NOx emissions from parts of on-road heavy-duty diesels are higher than which been registered. Therefore, CN_VI emission regulations clearly proposes that the heavy-duty diesels should be supervised by a T-BOX which can transmit CAN message from vehicle OBD interface to the remote monitoring platform. Recognition of cheating behaver and calculation method of NOx emission were developed and verified by platform data from on-line vehicle. The modules in the platform can effectively monitor urea consumption rationality, injection system working state, exhaust temperature sensor signal reasonability, NOx sensor signal reasonability and NOx emission level, which can reduce the cost of supervision and governance, improve the effectiveness of regulation and provide basic data for policy making.

Development of High Efficiency 5MW Class Gas Turbine the Kawasaki M5A

2019 ◽  
Author(s):  
Shinya Ishihara ◽  
Koji Terauchi ◽  
Takuya Ikeguchi ◽  
Masanori Ryu
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
High Efficiency ◽  
Operating Conditions ◽  
Test Results ◽  
Exhaust Temperature ◽  
Low Emission ◽  
Power Application ◽  
Technical Features ◽  
Steam Production

Abstract Kawasaki Heavy Industries (KHI) launched the M5A gas turbine with a rated output of 4.7MW and 32.6% of thermal efficiency at ISO operating conditions. This gas turbine was designed for combined heat and power application (CHP) with dry low emission (DLE) and the features are that it is compact and light-weight. It also has high efficiency (highest in class), suitable exhaust temperature for steam production and achieved the lowest level of exhaust emissions by using proven DLE technologies originating from other recent KHI gas turbines. The design philosophy was successfully applied to be based on previous reliable gas turbine structure and materials as well as using the state-of-the-art technology about aerodynamics and the cooling. The in-house verification tests have been conducted since 2016 to confirm design targets for performance, emissions, durability and operability. This paper describes the development process of M5A and includes technical features and validation test results.

Using Conventional Articulation Tests With Highly Unintelligible Children

1992 ◽  
Vol 23 (1) ◽  
pp. 52-60 ◽  
Author(s):  
Pamela G. Garn-Nunn ◽  
Vicki Martin
Keyword(s):  
Test Results ◽  
Phonological Processes ◽  
Rule Based ◽  
Severity Level ◽  
Error Sensitivity ◽  
Conventional Tests ◽  
Severity Levels ◽  
Conventional Test ◽  
Impaired Children

This study explored whether or not standard administration and scoring of conventional articulation tests accurately identified children as phonologically disordered and whether or not information from these tests established severity level and programming needs. Results of standard scoring procedures from the Assessment of Phonological Processes-Revised, the Goldman-Fristoe Test of Articulation, the Photo Articulation Test, and the Weiss Comprehensive Articulation Test were compared for 20 phonologically impaired children. All tests identified the children as phonologically delayed/disordered, but the conventional tests failed to clearly and consistently differentiate varying severity levels. Conventional test results also showed limitations in error sensitivity, ease of computation for scoring procedures, and implications for remediation programming. The use of some type of rule-based analysis for phonologically impaired children is highly recommended.

Vestibular Function and Motion Sickness Susceptibility: Videonystagmographic Evidence From Oculomotor and Caloric Tests

2020 ◽  
Vol 29 (2) ◽  
pp. 188-198
Author(s):  
Cynthia G. Fowler ◽  
Margaret Dallapiazza ◽  
Kathleen Talbot Hadsell
Keyword(s):  
Phase Velocity ◽  
Motion Sickness ◽  
Repeated Measures ◽  
Short Form ◽  
Vestibular Function ◽  
Slow Phase ◽  
Test Results ◽  
Normal Range ◽  
Slow Phase Velocity ◽  
Caloric Tests

Purpose Motion sickness (MS) is a common condition that affects millions of individuals. Although the condition is common and can be debilitating, little research has focused on the vestibular function associated with susceptibility to MS. One causal theory of MS is an asymmetry of vestibular function within or between ears. The purposes of this study, therefore, were (a) to determine if the vestibular system (oculomotor and caloric tests) in videonystagmography (VNG) is associated with susceptibility to MS and (b) to determine if these tests support the theory of an asymmetry between ears associated with MS susceptibility. Method VNG was used to measure oculomotor and caloric responses. Fifty young adults were recruited; 50 completed the oculomotor tests, and 31 completed the four caloric irrigations. MS susceptibility was evaluated with the Motion Sickness Susceptibility Questionnaire–Short Form; in this study, percent susceptibility ranged from 0% to 100% in the participants. Participants were divided into three susceptibility groups (Low, Mid, and High). Repeated-measures analyses of variance and pairwise comparisons determined significance among the groups on the VNG test results. Results Oculomotor test results revealed no significant differences among the MS susceptibility groups. Caloric stimuli elicited responses that were correlated positively with susceptibility to MS. Slow-phase velocity was slowest in the Low MS group compared to the Mid and High groups. There was no significant asymmetry between ears in any of the groups. Conclusions MS susceptibility was significantly and positively correlated with caloric slow-phase velocity. Although asymmetries between ears are purported to be associated with MS, asymmetries were not evident. Susceptibility to MS may contribute to interindividual variability of caloric responses within the normal range.

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