in this paper, a numerical study is performed to provide the combustion and emission characteristics resulting from fuel-reactivity controlled compression ignition (rcci) combustion mode in a heavy-duty, single-cylinder diesel engine with gasoline and diesel fuels. in rcci strategy in-cylinder fuel blending is used to develop fuel reactivity gradients in the combustion chamber that result in a ...

One remaining issue of CO2 processes are problems in connection with the lubrication oil. The objective of this project is to prove the feasibility of a small oil free semi hermetic piston type CO2-compressor for supercritical heat pump applications with large temperature spans. These processes involve high pressures like 35 bar suction pressure and 80 to 150 bar delivery pressure. A functional...

In this paper, a numerical study is performed to provide the combustion and emission characteristics resulting from fuel-reactivity controlled compression ignition (RCCI) combustion mode in a heavy-duty, single-cylinder diesel engine with gasoline and diesel fuels. In RCCI strategy in-cylinder fuel blending is used to develop fuel reactivity gradients in the combustion chamber that result in a ...

For rotating-tool machining, such as milling, line boring, and cylinder boring, the tool rotation causes the machining force on each tooth to rotate repetitively relative to the inertial coordinate frame. This is quite different than stationary-tool machining, such as turning or boring with a stationary boring bar, in which the force directions are fixed relative to the inertial frame. Although...

Aiming at the undulating member bar, three kinds of wavelength models are established. The flow characteristics bar with space angle attack analyzed by large eddy simulation method under high Reynolds number, its velocity and pressure distribution different wavelengths studied, time frequency domain circumferential coefficient, resistance lift discussed. results suggest that greater fluctuation...

This experimental study was conducted using a single-cylinder compression ignition (CI) engine with pilot injection strategy to determine the effect of fuel pressure and timing second start (SOI2) on combustion emission characteristics. experiment used mixture 80% commercial gasoline (G80%) 20% soybean biodiesel (B20%), by volume. The applied varying SOI2. Meanwhile, first (SOI1) constant at -3...

OBJECTIVE To introduce a newly designed massage instrument, the Hand Grip T-bar (HT-bar) and use it to relieve chronic non-specific low back pain (nLBP) through deep cross-friction massage (roptrotherapy). METHOD 22 subjects (9 males and 13 females, aged 51.6±6.7) with chronic nLBP were allocated randomly to a Roptrotherapy group (n=12) and a Transcutaneous Electrical Nerve Stimulation (TENS)...

A surface walking/climbing robot is developed based on a simple planar 8-bar locomotion mechanism using four 2-way linear cylinders and four 2-way gripper modules. The robot may traverse a fixed distance or turn at a fixed angle after completing a series of repetitive cylinder and gripper actions termed gaits. Symmetric arrangement of the actuators decouples the translation and rotation of the ...