Energy consumption investigation of electromagnetic valve train at gas pressure conditions

2019 ◽  
Vol 146 ◽  
pp. 768-774 ◽  
Author(s):  
Xinyu Fan ◽  
Siqin Chang ◽  
Jiayu Lu ◽  
Liang Liu ◽  
Shouguang Yao ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Gas Pressure ◽  
Valve Train ◽  
Electromagnetic Valve

Loss analysis of electromagnetic valve train under different service conditions

2021 ◽  
pp. 1-13
Author(s):  
Xinyu Fan ◽  
Jie Yin ◽  
Shichuan Su ◽  
Hongyan Pang ◽  
Yindong Song
Keyword(s):  
Internal Combustion Engines ◽  
Electric Energy ◽  
Exhaust System ◽  
Gas Pressure ◽  
Valve Train ◽  
Loss Distribution ◽  
Electromagnetic Valve ◽  
Copper Loss ◽  
Simulink Model ◽  
Service Conditions

Electromagnetic valve train (EMVT) can realize independent, real-time and continuous valve motion regulation through the precise motion servo control, which has great potential to improve the efficiency of internal combustion engines. As an electromechanical integration device, EMVT is driven by electric energy, and the loss distribution is complex and changeable under different service conditions. Especially when the EMVT is used in exhaust system, the high gas pressure after combustion will increase the energy loss and operating temperature significantly. In order to improve the device performance, this study analyses the loss distribution and variation law of EMVT under different service conditions. First, the flux density is obtained by the 3D finite element simulation. In combination with the valve train dynamic Matlab/Simulink model, the copper loss and iron loss of EMVT under typical conditions are explored in detail. Then, the influence of the motion parameters (transition time) and condition parameters (gas pressure) on EMVT’s loss are calculated and analyzed significantly. In the end, the accuracy of the loss models and analysis results is verified by the experiment based on linear load simulator.

A NEW ELECTROMAGNETIC VALVE TRAIN WITH PM/EM ACTUATOR IN SI ENGINES

2013 ◽  
Vol 37 (3) ◽  
pp. 787-796 ◽  
Author(s):  
Yaojung Shiao ◽  
Ly Vinh Dat
Keyword(s):  
Energy Consumption ◽  
Permanent Magnet ◽  
Optimal Parameter ◽  
Special Structure ◽  
Valve Train ◽  
Electromagnetic Valve ◽  
Electromagnetic Coil ◽  
Si Engines ◽  
Simulation Results ◽  
Actuator Control

This paper proposes a new electromagnetic valve train (EMV), which uses hybrid permanent magnet and electromagnetic coil (PM/EM). The new EMV is characterized by a special structure, simple actuator as well as optimal parameter designs. This EMV brings many benefits, such as valve dynamic, actuator control, and low operation energy consumption, etc. The simulation results show that this EMV achieves a 15% volume reduction and a 20% enhancement in holding force by special armature design. Additionally, the estimated energy consumption of EMV operation for the proposed EMV indicates that this EMV has the lowest operating energy compared with other EMVs.

Design and analysis of skip fire valve strategies based on electromagnetic valve train

2018 ◽  
Vol 129 ◽  
pp. 833-840 ◽  
Author(s):  
Maoyang Hu ◽  
Siqin Chang ◽  
Liang Liu ◽  
Yaxuan Xu ◽  
Jiangtao Xu
Keyword(s):  
Valve Train ◽  
Electromagnetic Valve

Transients of Electromagnetic Valve Train (EMVT) Actuators

2004 ◽  
Author(s):  
Christoph Hartwig ◽  
Olaf Josef ◽  
Klaus Gebauer
Keyword(s):  
Valve Train ◽  
Electromagnetic Valve

scholarly journals Study on Valve Strategy and Fuel Benefits of Skip Fire Based on Electromagnetic Valve Train

2018 ◽  
Vol 202 ◽  
pp. 02003
Author(s):  
Maoyang Hu ◽  
Siqin Chang
Keyword(s):  
Control Method ◽  
Valve Train ◽  
Normal Operation ◽  
Energy Losses ◽  
Exhaust Pipe ◽  
Firing Cycle ◽  
Exhaust Gas ◽  
Gasoline Engines ◽  
Electromagnetic Valve ◽  
Brake Mean Effective Pressure

Cylinder deactivation (CDA) is a fuel consumption reduction technology for gasoline engines. Skip fire is a new type of CDA because the load and the density of firing cylinder are in proportion to the torque demand. However, it is difficult to realize because valves need to be switched between valve deactivation and normal operation stroke by stroke. The Electromagnetic valve train (EMVT) provides a fully flexible control method to achieve skip fire. In the paper, a new skip fire strategy based on electromagnetic intake valve train (EMIV) is proposed. Then, the oxygen concentration of the exhaust pipe, energy losses, in-cylinder pressure of the skipped cycle and exhaust gas recirculation (EGR) rate of the firing cycle are studied by the 1D simulation in GT-Power. The results shows the majority of gas sucked into the skipped cylinder is exhaust gas by reasonable control of IVO and IVC, and the exhaust oxygen-rich can be avoided. Meanwhile, EGR rate of the firing cylinder and energy losses of the skipped cylinder are maintained at lower level. At the conditions of 1200 and 1600 rpm, fuel economy has been improved respectively 8.1%-16.6% and 6.4%-14.6% when the brake mean effective pressure (BMEP) ranges from 0.4MPa to 0.2MPa.

scholarly journals Individual Cylinder Air-Fuel Ratio Estimation for a Gasoline Engine with Electromagnetic Valve Train

2018 ◽  
Vol 202 ◽  
pp. 02011
Author(s):  
Yaxuan Xu ◽  
Siqin Chang
Keyword(s):  
Steady State ◽  
Gasoline Engine ◽  
Estimation Algorithm ◽  
Valve Train ◽  
Unknown Parameters ◽  
Steady State Condition ◽  
Electromagnetic Valve ◽  
Fuel Ratio ◽  
De Algorithm ◽  
The Individual

For the multi cylinder gasoline engine, the consistency of each cylinder is an important index to affect the emission and the power. In this paper, in order to reduce the air-fuel ratio (A/F) maldistribution of the engine based on the electromagnetic valve train (EMVT), an individual cylinder A/F estimation algorithm is proposed for the individual cylinder A/F control. Based on the analysis of the hybrid and transfer models of the exhaust of each cylinder in steady state, an individual A/F observer is established by using Kalman filter algorithm. Then the unknown parameters in the observer are identified by the differential evolution(DE) algorithm. Only a single wide area exhaust oxygen(UEGO) sensor is needed to identify the unknown parameters and estimate the A/F of each cylinder. The combined simulation of GT-Power and Simulink validates the effectiveness of the proposed estimation approach. The results show that the proposed method can provide good estimation results under steady-state condition.

Electromagnetic valve train for gasoline engine exhaust system

2016 ◽  
Vol 17 (3) ◽  
pp. 361-367 ◽  
Author(s):  
X. Y. Fan ◽  
L. Liu ◽  
S. Q. Chang ◽  
J. T. Xu ◽  
J. G. Dai
Keyword(s):  
Gasoline Engine ◽  
Exhaust System ◽  
Valve Train ◽  
Engine Exhaust ◽  
Electromagnetic Valve
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