This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Single-Cylinder Engine Tests of a Motor-Driven, Variable-Valve Actuator
Technical Paper
2001-01-0241
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
A novel mechanism concept for a fully flexible, motor-driven, cam-actuated engine valve was reported in [1]. It is capable of i) variable valve timing, ii) variable lift and iii) individual valve phasing control. To check the validity of the concept in real engine environment, engine tests were performed using a single-cylinder of a modified six-cylinder 3.8-liter production engine, with the new motor-driven mechanisms replacing both valves. Firing tests of this engine, with equivalent valve profiles to the production profiles, yielded similar fuel consumption, lower NOx emissions but higher IMEP COV and HC emissions. Motoring tests demonstrated variable timing capability, low cycle-to-cycle valve lift-profile variation as well as low seating velocity and noise. Lessons learned from testing the system in a real engine environment are discussed in details and suggestions for future variable-valve actuation concepts' requirements are offered.
Recommended Content
Authors
Citation
Henry, R., "Single-Cylinder Engine Tests of a Motor-Driven, Variable-Valve Actuator," SAE Technical Paper 2001-01-0241, 2001, https://doi.org/10.4271/2001-01-0241.Also In
References
- Henry R. R. Lequesne B. P. “A Novel, Fully Flexible, Electro-Mechanical Engine Valve Actuation System,” SAE paper # 970249
- Lenz H.P. Geringer B. Smetana G. Dachs A. “Initial Test Results of an Electro-Hydraulic Variable-Valve Actuation System on a Firing Engine,” SAE Paper 890678 1989
- Richeson W. E. Erickson F.L. “Pneumatic Actuator with Permanent Magnet Control Valve Latching,” Aug. 1 1989
- Theobald Mark A. Lequesne Bruno Henry Rassem R. “Control of Engine Load via Electromagnetic Valve Actuators,” SAE Paper # 940816 1994
- Pischinger F. Kreuter P. “Electromagnetically Operating Actuator,” June 19 1984
- Pischinger F. Kreuter P. “Arrangement for Electromagnetically Operated Actuators,” May 7 1985
- Gottschalk M. “Electromagnetic Valve Actuator Drives Variable Valve Train,” Design News Nov. 1 1993 123 125
- Schroeder; T Henry; R. R. Lequesne; B. P. Murty; B. V. “Method and apparatus for electrically driven engine valves,” Feb 4 1997
- Schroeder; T Henry; R. R. Lequesne; B. P. “Method and apparatus for electrically driven engine valves,” Feb 27 1996
- Schroeder; T Henry; R. R. Lequesne; B. P. Murty; B. V. “Method and apparatus for electrically driven engine valves,” Jul 12 1994
- Henry R. R. “A Lash Adjusting Mechanism For Electro-Mechanical Variable Valve Actuator,” Research Disclosure #41708 Jan 1999
- Ogata “Modern Control Engineering,” Prentice-Hall 1970