Experimentally Optimization of a Variable Compression Ratio Engine Performance Using Different Blends of Cotton Seed with Diesel Fuel at Different Compression Ratio

2018 ◽  
pp. 121-128
Author(s):  
Satendra Singh ◽  
Ashish Nayyar ◽  
Rahul Goyal ◽  
Mahesh Saini
Keyword(s):  
Compression Ratio ◽  
Diesel Fuel ◽  
Cotton Seed ◽  
Engine Performance ◽  
Variable Compression Ratio ◽  
Variable Compression Ratio Engine ◽  
Variable Compression

scholarly journals Research on a prototype spark ignition (SI) variable compression ratio engine fitted with a pneumatic energy accumulator

2014 ◽  
Vol 159 (4) ◽  
pp. 54-65
Author(s):  
Przemysław ŁAZIŃSKI ◽  
Michał GŁOGOWSKI ◽  
Jacek LEYKO
Keyword(s):  
Compression Ratio ◽  
Engine Performance ◽  
Machine Design ◽  
Maximum Pressure ◽  
Engine Operation ◽  
Variable Compression Ratio ◽  
University Of Technology ◽  
Operation Stability ◽  
Variable Compression Ratio Engine ◽  
Variable Compression

The paper describes investigations performed on a prototype variable compression ratio engine fitted with a pneumatic energy accumulator. The engine was built in the Chair of Vehicles and Basics of Machine Design at Lodz University of Technology. Due to the design and principle of operation, the engine may be an alternative to the already existing VCR engines. The pneumatic energy accumulator fitted in the cylinder head with an additional moving piston allows continuous adjustment of the compression ratio. The system is adaptive and adjusts itself to the engine load, reducing the increment of maximum pressure inside the cylinder. The research focuses on the influence of adjustment parameters of the energy accumulator on the movement of the additional piston and engine performance. Engine operation stability and reproducibility of the cycles has also been investigated. An attempt was made to characterize the engine and the energy accumulator in terms of efficiency and range of applicability (profitability of application).

scholarly journals Study on the Dynamic Characteristics of a Hydraulic Continuous Variable Compression Ratio System

2019 ◽  
Vol 9 (21) ◽  
pp. 4484 ◽  
Author(s):  
Chen ◽  
Wang ◽  
Liu ◽  
Yang
Keyword(s):  
Dynamic Characteristics ◽  
Compression Ratio ◽  
Hydraulic System ◽  
Flow Characteristics ◽  
Engine Performance ◽  
Fast Response ◽  
Continuous Variable ◽  
Variable Compression Ratio ◽  
Bottom Dead Center ◽  
Variable Compression

Variable compression ratio (VCR) technology has long been recognized as a method for improving the engine performance, efficiency, and fuel economy of automobiles, with reduced emissions. In this paper, a novel hydraulic continuous VCR system based on the principle of an adjustable hydraulic volume is introduced. The continuous variable compression ratio of the VCR system is realized by the hydraulic system controlling the rotation of the eccentric pin to change the positions of the top dead center (TDC) and the bottom dead center (BDC). The construction of the mathematical model and simulation model of the VCR system is also presented in this paper. The piston motion characteristics, flow characteristics, and pressure characteristics of the hydraulic system of the VCR system at different engine speeds and adjustment quantities are studied by simulation in this paper. The simulation results show that the VCR system has a fast response and good dynamic characteristics, and can achieve continuous adjustment of the compression ratio.

Variable Compression Ratio Diesel Engine Performance Analysis

2015 ◽  
Vol 28 (1) ◽  
pp. 6-12 ◽  
Author(s):  
K.Satya narayana ◽  
◽  
Vinodh Kumar Padala ◽  
T.V.Hanumantha Rao ◽  
S.V.Umamahe swararao
Keyword(s):  
Diesel Engine ◽  
Performance Analysis ◽  
Compression Ratio ◽  
Engine Performance ◽  
Variable Compression Ratio ◽  
Variable Compression
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