Results 41 to 50 of about 4,697 (226)

A Turbo Charged Dual Fuel HCCI Engine [PDF]

SAE Technical Paper Series, 2001
<div class="htmlview paragraph">A 6-cylinder truck engine is modified for turbo charged dual fuel Homogeneous Charge Compression Ignition (HCCI) engine operation. Two different fuels, ethanol and n-heptane, are used to control the ignition timing.
Olsson, Jan-Ola, Tunestål, Per, Haraldsson, Göran, Johansson, Bengt   +3 more
openaire   +2 more sources

Analysis of controlled auto-ignition /HCCI combustion in a direct injection gasoline engine with single and split fuel injections

, 2008
A multi-cycle three-dimensional CFD engine simulation programme has been developed and applied to analyze the Controlled autoignition (CAI) combustion, also known as homogeneous charge compression ignition (HCCI), in a direct injection gasoline engine ...
Jiang, X, Jiang, Xi, Cao, L, Zhao, H, Cao, Li, Zhao, Hua   +5 more
core   +1 more source

Multiple Point Ion Current Diagnostics in an HCCI Engine [PDF]

, 2004
Interest in ion current sensing for HCCI combustion arises when a feedback signal from some sort of combustion sensor is needed in order to determine the state of the combustion process.
Petter Strandh, Bengt Johansson, Tunestål, Per, Tunestål, Per,, Anders Hultqvist, Strandh, Petter, Johansson, Bengt,, Andreas Vressner, Per Tunestål, Vressner, Andreas, Hultqvist, Anders,, Vressner, Andreas,, Hultqvist, Anders, Strandh, Petter,, Lund University., Johansson, Bengt   +15 more
core   +1 more source

Computational Analysis of Spray Angle Effects on Combustion and Emissions in Methane‐Diesel Dual‐Fuel Engine

Energy Science &Engineering, Volume 14, Issue 3, Page 1100-1112, March 2026.
This study concluded that wider spray angles produce wall impingement and greater unburned hydrocarbons in methane‐diesel dual‐fuel engines, whereas 110° balances efficiency and emissions. ABSTRACT A diesel methane dual fuel engine appears as a potential means for lowering emissions while retaining useful thermal efficiency.
Abdullah Al Rifat, Md. Arafat Rahman, Md. Mizanur Rahman, Tafsirul Hassan, Md Nazmul Haque   +4 more
wiley   +1 more source

Computational studies on HCCI engines. [PDF]

, 2010
Emission legislation is changing in an effort to reduce exhaust emissions from the IC engines. Research and development has been focused on improving both spark-ignition and compression ignition engines to make them more efficient.
Correia, Eduardo Rodrigues
core  

Research on Homogeneous Charge Compression Ignition Combustion of Intake Port Exhaust Gas Recirculation Based on Cam Drive Hydraulic Variable Valve Actuation Mechanism

Energies, 2022
The thermal efficiency of an efficient gasoline engine is only about 40% and it will produce a large number of harmful products. Curbing harmful emissions and enhancing thermal efficiency have always been the goals pursued and emission regulations are ...
Linghai Han, Jiaquan Duan, Dingchao Qian, Yanfeng Gong, Yaodong Wang, Fangxi Xie, Yan Su   +6 more
doaj   +1 more source

Noise, Vibration, and Harshness (NVH) Challenges in Hydrogen Internal Combustion Engine Vehicles

Energy Science &Engineering, Volume 14, Issue 2, Page 1067-1080, February 2026.
ABSTRACT This paper presents a state‐of‐the‐art literature review on noise, vibration, and harshness (NVH) in hydrogen‐fuelled internal combustion engines. Studies published between 2011 and 2025 were screened, covering fundamental flame physics, test‐bench work, and recent prototype vehicles.
Krisztián Horváth
wiley   +1 more source

Investigation of transition between spark ignition and controlled auto-ignition combustion in a V6 direct-injection engine with cam profile switching

, 2008
Controlled auto-ignition (CAI) combustion, also known as Homogeneous Charge Compression Ignition (HCCI) can be achieved by trapping residuals with early exhaust valve closure in a direct fuel injection in-cylinder four-stroke gasoline engines (through ...
Zhao, H, Kalian, N, Qiao, J
core   +1 more source

An Experimental Investigation of the Effects of Acetone, Tetrahydrofuran and N-heptane Fuel Blends on HCCI Combustion and Engine Performance

Gazi Üniversitesi Fen Bilimleri Dergisi, 2019
In the current study, a single cylinder, four stroke gasoline engine was converted to HCCI engine. HCCI engine was run at 1400 rpm, between λ=1.9 and λ=2.74 lambda values with n-heptane, acetone/n-heptane (A20N80) and tetrahydrofuran/n-heptane (F20N80 ...
Bilal AYDOĞAN, Alper CALAM, Ahmet UYUMAZ   +2 more
doaj   +1 more source

The Impact of Private Equity Hospital Acquisitions on Maternal Health for Medicaid Patients

Health Services Research, Volume 61, Issue 1, February 2026.
ABSTRACTObjectiveTo examine the impact of private equity (PE) hospital acquisitions on maternal health for Medicaid patients.Study Setting and DesignThis quasi‐experimental study focuses on 66 PE acquisitions of hospitals between 2014 and 2018, analyzing national Medicaid claims data from 2011 to 2020. Using a difference‐in‐differences (DiD) framework,
Yang Amy Jiao
wiley   +1 more source