Vehicle Demonstration of 2 Stroke Engine Brake in a Heavy Duty Truck
Heavy duty valvetrains have evolved over the last 20 years with the integration of engine braking into the valvetrain. Jacobs Vehicle Systems have developed the High Power Density (HPD) engine brake that increases retarding powe, especially at low engine speed. The system works by converting the engine from a 4 stroke during positive power into a 2 stroke for retarding power. This more than doubles the retarding power at cruise engine speeds reducing the need to downshift in order to control the vehicle, compensates for reduction in natural vehicle retarding due to aerodynamic and friction enhancements, and enables the same vehicle retarding power with a smaller displacement engine as engine downsizing becomes prevalent. This paper describes lessons learnt during a recent vehicle demonstration project undertaken by Jacobs including performance, durability, integration with the engine powertrain, controls development, calibration, management of air system and transient operation.
- Record URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/1946391X
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Supplemental Notes:
- Abstract reprinted with permission of SAE International.
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Authors:
- Howell, Thomas
- Swanbon, Bruce
- Baltrucki, Justin
- Steines, Alan
- Neff, Nancy
- Lu, Biao
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Conference:
- SAE 2016 Commercial Vehicle Engineering Congress
- Location: Rosemont Illinois, United States
- Date: 2016-10-4 to 2016-10-6
- Publication Date: 2016-9-27
Language
- English
Media Info
- Media Type: Web
- Features: Figures; Photos; References; Tables;
- Pagination: pp 260-269
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Serial:
- SAE International Journal of Commercial Vehicles
- Volume: 9
- Issue Number: 2
- Publisher: SAE International
- ISSN: 1946-391X
- EISSN: 1946-3928
- Serial URL: https://www.sae.org/publications/collections/content/E-JOURNAL-02/
Subject/Index Terms
- TRT Terms: Braking; Calibration; Demonstration projects; Durability; Engine components; Engine valves; Heavy duty trucks; Performance tests; Power trains; Two stroke cycle engines
- Subject Areas: Highways; Motor Carriers; Vehicles and Equipment;
Filing Info
- Accession Number: 01620782
- Record Type: Publication
- Source Agency: SAE International
- Report/Paper Numbers: 2016-01-8061
- Files: TRIS, SAE
- Created Date: Jan 5 2017 4:23PM