BSFC Investigation Using Variable Valve Timing in a Heavy Duty Diesel Engine

2009 ◽  
Author(s):  
Jiamei Deng ◽  
Richard Stobart
Keyword(s):  
Diesel Engine ◽  
Variable Valve Timing ◽  
Valve Timing ◽  
Heavy Duty ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Variable Valve

Full-Load HCCI Operation with Variable Valve Actuation System in a Heavy-Duty Diesel Engine

2007 ◽  
Author(s):  
Yuuichi Kodama ◽  
Izumi Nishizawa ◽  
Takumi Sugihara ◽  
Norihiko Sato ◽  
Tadashi Iijima ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Heavy Duty ◽  
Full Load ◽  
Variable Valve Actuation ◽  
Actuation System ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Variable Valve ◽  
Valve Actuation

Self-Starting Cogging-Torque-Assisted Motor Drive for Use in a Heavy-Duty Diesel Engine

2019 ◽  
Author(s):  
Devin K. Reinholz ◽  
Bradley A. Reinholz ◽  
Rudolf J. Seethaler
Keyword(s):  
Diesel Engine ◽  
Motor Drive ◽  
Heavy Duty ◽  
Cogging Torque ◽  
Actuation System ◽  
Heavy Duty Diesel Engine ◽  
Simulation Results ◽  
Heavy Duty Diesel ◽  
Damper Windings ◽  
Variable Valve

Abstract This paper describes the design process and simulation results of a variable valve actuation system modeled after the cogging-torque-assisted motor drive (CTAMD) found in literature. Unlike the CTAMD, the new design is capable of handling large exhaust pressures. Furthermore, the new design incorporates damper windings to improve upon the CTAMD by enabling self-starting. The new variable valve actuator is designed for the 6-cylinder Westport 15L diesel engine. The simulated results suggest that the new variation of the CTAMD can be effectively applied to a turbocharged heavy-duty diesel engine. Simulation results show that the designed motor is capable of self-starting, and infinitely variable lifts. The damper windings are shown to be more beneficial at enabling self-starting and infinitely variable lifts than a spring, since they do not impose additional energy requirements during a valve transition. Furthermore, the new design is also shown to be capable of actuating exhaust valves in the presence of cylinder pressures up to 16 bar with similar efficiency to that of a standard camshaft valve train.

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