柴油机电辅助增压系统性能研究
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摘要
为了消除涡轮滞后效应并增强柴油机低速性能,在涡轮增压柴油机系统的基础上进行改进,设计了一套电辅助增压柴油机系统。利用GT-Power建模,研究电辅助增压系统与涡轮增压系统对柴油机性能的影响。研究表明:在中低转速时,电辅助增压柴油机系统的转矩获得了大幅增加,在1200RPM转速下发动机转矩可由172N*m增加至368N*m。几乎在全转速下,压气机平均效率可获得提升,在1200RPM转速下由53%增涨至64%。当发动机转速超过2000RPM时,受电动机最大额定功率限制,电辅助增压系统输出转矩略有下降。在2000RPM转速下,电辅助增压系统输出转矩由140N*m增加至430N*m所需的响应时间减少了3.84s。在3000RPM转速下,对两系统中压气机实施相同的压比,在牺牲少量的输出功率情况下,电辅助增压系统的经济性得到大幅改善,最多可在增压比为1.8时实现发电机回收净功率11.3kW,此时有效燃油消耗率最多可由260g/kWh下降至241g/kWh。
To eliminate the Turbo-lag effect and enhance performance of diesel engine at low engine speed, a set of electric assisted charged(eCharged) diesel system was designed based on the turbocharged diesel system. Study on performance of e Charged diesel system and turbocharged diesel system was simulated by GT-power. Research shows that, at low and medium engine speed, the torque of e Charged diesel system has increased a lot. The torque can promote from 172 N*m to 368 N*m at 1200 RPM engine speed. Almost at all engine speed,the average efficiency of compressor has increased. At 1200 engine speed, it can increase from 53% to 64%.When the engine speed is moreover than 2000 RPM, the torque of eCharged system decrease a little due to the limition of rated power of the motor. When operated at2000 RPM, the response time of output torque of eCharged system which increased from 140 N*m to 430 N*m has decreased 3.84 s.At 3000 engine speed, carried out the same pressure ratio of compressor in the two systems, the economy of e Charged system has improved aggressively with the limited fall of output torque. The generator can recover maxium 11.3 kW net power at pressure ratio of 1.8.Meanwhile,the brake specific fuel consumption(BSFC) decrease from 260 g/kWh to 241 g/kWh.
To eliminate the Turbo-lag effect and enhance performance of diesel engine at low engine speed, a set of electric assisted charged(eCharged) diesel system was designed based on the turbocharged diesel system. Study on performance of e Charged diesel system and turbocharged diesel system was simulated by GT-power. Research shows that, at low and medium engine speed, the torque of e Charged diesel system has increased a lot. The torque can promote from 172 N*m to 368 N*m at 1200 RPM engine speed. Almost at all engine speed,the average efficiency of compressor has increased. At 1200 engine speed, it can increase from 53% to 64%.When the engine speed is moreover than 2000 RPM, the torque of eCharged system decrease a little due to the limition of rated power of the motor. When operated at2000 RPM, the response time of output torque of eCharged system which increased from 140 N*m to 430 N*m has decreased 3.84 s.At 3000 engine speed, carried out the same pressure ratio of compressor in the two systems, the economy of e Charged system has improved aggressively with the limited fall of output torque. The generator can recover maxium 11.3 kW net power at pressure ratio of 1.8.Meanwhile,the brake specific fuel consumption(BSFC) decrease from 260 g/kWh to 241 g/kWh.
引文
[1]Kazuhiro Nishiwaki, Masahiro Iezawa. Development of High Speed Motor and Inverter for Electric Supercharger[J].SAE, 2013-01-0931.
[2]Professor C.D.Rakopoulos, Dr.E.G.Giakoumis. Diesel Engine Transient Operation[M].1st Ed. London:Springer, 2009:42-57.
[3]Hermann Hiereth, Peter Prenninger. Charging the internal combustion engine[M]. 1st Ed. Wien:Springer, 2007,151-157.
[4]Wei Wei, Weilin Zhuge. Comparative study on electric turbo-compounding systems for gasoline engine exhaust energy recovery[J]. SAME, 2010.
[5]Keiichi Shiraishi, Venky Krishnan.Electro-assist turbo for marine turbocharged diesel engines[J]. SAME,2014.
[6]Richard D. Burke. A numerical study of the benefits of electrically assisted boosting systems[J]. Engineering for Gas Turbines and Power, 2016, 138:092808(1-9).
[7]Rasoul Salehi, Jason Martz, et al.Comparison of high-and low-pressure electric supercharging of a hdd engine:steady state and dynamic air-path considerations[J].SAE, 2016-01-1035.
[8]G Tavcˇar, F Bizjan, and T Katrasˇnik*.Methods for improving transient response of diesel engines–influences of different electrically assisted turbocharging topologies[J]. Automobile Engineering, 2011,Proc. IMechE Vol. 225:1167-1185.
[9]Woongkul Lee, Yingjie Li,et al.Overview of electric turbocharger and supercharger for downsized internal combustion engines[J].IEEE, 2017, 3(1).
[10]Prasad Sajjan Divekar, Beshah Ayalew and Robert Prucka.Coordinated electric supercharging and turbo-generation for a diesel engine[J].SAE, 2010-01-1228.
[11]Stephane Tavernier,Samuel Equoy. Design and Characterization of an E-booster Driven by an High Speed Brushless DC Motor[J].SAE, 2013-01-1762.
[12]Weilin Zhuge, Lei Huang,et,al.Optimization of an Electric Turbo Compounding System for Gasoline Engine Exhaust Energy Recovery[J].SAE, 2011-01-0377.
[13]Gamma Technologies, GT-Suite Examples, v7.5.
[2]Professor C.D.Rakopoulos, Dr.E.G.Giakoumis. Diesel Engine Transient Operation[M].1st Ed. London:Springer, 2009:42-57.
[3]Hermann Hiereth, Peter Prenninger. Charging the internal combustion engine[M]. 1st Ed. Wien:Springer, 2007,151-157.
[4]Wei Wei, Weilin Zhuge. Comparative study on electric turbo-compounding systems for gasoline engine exhaust energy recovery[J]. SAME, 2010.
[5]Keiichi Shiraishi, Venky Krishnan.Electro-assist turbo for marine turbocharged diesel engines[J]. SAME,2014.
[6]Richard D. Burke. A numerical study of the benefits of electrically assisted boosting systems[J]. Engineering for Gas Turbines and Power, 2016, 138:092808(1-9).
[7]Rasoul Salehi, Jason Martz, et al.Comparison of high-and low-pressure electric supercharging of a hdd engine:steady state and dynamic air-path considerations[J].SAE, 2016-01-1035.
[8]G Tavcˇar, F Bizjan, and T Katrasˇnik*.Methods for improving transient response of diesel engines–influences of different electrically assisted turbocharging topologies[J]. Automobile Engineering, 2011,Proc. IMechE Vol. 225:1167-1185.
[9]Woongkul Lee, Yingjie Li,et al.Overview of electric turbocharger and supercharger for downsized internal combustion engines[J].IEEE, 2017, 3(1).
[10]Prasad Sajjan Divekar, Beshah Ayalew and Robert Prucka.Coordinated electric supercharging and turbo-generation for a diesel engine[J].SAE, 2010-01-1228.
[11]Stephane Tavernier,Samuel Equoy. Design and Characterization of an E-booster Driven by an High Speed Brushless DC Motor[J].SAE, 2013-01-1762.
[12]Weilin Zhuge, Lei Huang,et,al.Optimization of an Electric Turbo Compounding System for Gasoline Engine Exhaust Energy Recovery[J].SAE, 2011-01-0377.
[13]Gamma Technologies, GT-Suite Examples, v7.5.