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How does the pressure of tires affect the coefficient of rolling resistance of a bike tire?

Rolling resistance

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The pressure of tires significantly influences the coefficient of rolling resistance of bike tires. Research indicates that varying tire pressures at 30 Psi, 40 Psi, and 50 Psi affect the rolling resistance differently. Additionally, studies highlight that the air pressure level plays a crucial role in determining the rolling resistance force, with higher pressures leading to increased resistance. Moreover, the type of tread pattern on the tire surface, such as RIB and LUG patterns, also impacts the rolling resistance force, with different patterns resulting in varying resistance levels. Understanding the relationship between tire pressure, tread patterns, and rolling resistance is essential for optimizing fuel efficiency and overall vehicle performance.

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Journal Article•DOI Pengaruh Permukaan Alur Kembang (Tread Pattern) Ban Type Radial Ply Terhadap Rolling Resistance Aditya Krisna Hutomo, Dedy Dwi Laksana, Franciscus Xaverius Kristianta - Show less +2 more 01 Apr 2017	Tire pressure influences the coefficient of rolling resistance; higher pressure leads to a greater coefficient, affecting the force required for rolling.
Book Chapter•DOI Rolling Resistance of Tires Yukio Nakajima 01 Jan 2019 6 Citations	The pressure of bike tires affects the coefficient of rolling resistance by influencing the frictional energy in the contact area, as stated in the abstract of the research paper.
Open access•Journal Article•DOI The Effect of Tread Pattern Tires on Hard Compound Coefficient Rolling Resistance Muh Nurkoyim Kustanto 31 Oct 2022-Journal Of Mechanical Engineering, Science, And Innovation	The pressure of tires affects the coefficient of rolling resistance of a bike tire, with lower pressure resulting in higher rolling resistance values based on the study's findings.
Open access•Journal Article•DOI Analisis tekanan udara, sudut slip dan ukuran lebar ban tipe radial terhadap rolling resistance dengan metode taguchi Ilham Habibi, Dedi Dwilaksana, Boi Arief Fachri - Show less +2 more 01 Jan 2018	The air pressure of bike tires influences rolling resistance. Optimal pressure levels can reduce resistance, enhancing fuel efficiency. Varying pressure, slip angle, and tire width affect resistance.

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What is the effect of tire pressure on the performance of a vehicle?5 answersThe tire pressure of a vehicle has a significant impact on its performance. Proper tire pressure improves fuel economy, reduces braking distance, enhances vehicle control, and extends tire life. Studies have shown that uneven tire inflation pressure can greatly reduce braking performance and vehicle stability. Tire pressure also affects acceleration efficiency, with lower tire pressure leading to decreased efficiency. Additionally, tire pressure affects driving comfort and safety, as underinflated tires can result in reduced gas mileage, tire life, and vehicle performance. Different tire pressure control systems have been developed to optimize fuel consumption and improve driving quality and safety. There are both direct and indirect methods for checking tire pressure, with direct methods being more accurate but potentially facing issues with battery life and cost. Overall, maintaining proper tire pressure is crucial for optimal vehicle performance, safety, and efficiency.

What is a pressure coefficient?4 answersThe pressure coefficient is a parameter that expresses the wind pressure distribution on a structure. It is an important factor in understanding wind loads on buildings and other objects. The coefficient of pressure is often studied using Computational Fluid Dynamics (CFD) tools, which allow for detailed analysis of wind flow characteristics. The coefficient of pressure can vary along the circumference of a structure and with changes in wind incident angle. The pressure coefficient is used in the design of tall buildings to assess the effects of wind flow. Different studies have focused on measuring and validating the pressure coefficient using experimental measurements in wind tunnels and comparing the results with standard codes. The pressure coefficient is also relevant in the field of elastohydrodynamic lubrication, where it quantifies the isothermal pressure dependence of viscosity.

How does the presence of urban canyons affect the coefficient of pressure?5 answersThe presence of urban canyons affects the coefficient of pressure. The height and width of the canyon play a role in influencing the thermal and flow field within the canyon, which in turn affects the coefficient of pressure. Additionally, the geometry and orientation of the canyon, as well as the presence of vegetation, can impact the air quality within the canyon. The orientation of the canyon also affects the wind behavior and pollutant dispersion patterns, with different orientations leading to variations in ventilation and pollutant concentration levels. The characteristics of the canyon, such as building height, width, and tree cover, can worsen or improve air quality within the canyon. Overall, the presence of urban canyons has a significant impact on the coefficient of pressure and air quality within these environments.

What is the relationship between contact angle and pressure?5 answersThe contact angle is influenced by pressure. An increase in pressure generally leads to an increase in the contact angle. In physical chemistry of surfaces, it has been observed that an increase in hydrostatic pressure causes an increase in the contact angle on the three-phase contact line. This relationship between contact angle and pressure has been experimentally confirmed in systems where thermodynamic equilibrium is reached. The contact angle-pressure relationship is also affected by the chemical properties of the materials involved. The contact angle can be observed to vary within a range by changing the pressure at the three-phase line. The dependence of the contact angle on pressure provides a possible explanation for contact angle hysteresis. Overall, the contact angle and pressure are interconnected in determining the behavior of liquid-vapor interfaces on solid surfaces.

What is the Research on influence mechanism of tire pressure on the ride comfort of automobile?5 answersThe research on the influence mechanism of tire pressure on the ride comfort of automobiles has been investigated in several papers. Lu Yongjie et al. developed a multi-body dynamics model of a heavy vehicle using ADAMS software and introduced the Strikbeck dynamical friction property to the tire model to accurately reflect the dynamic contact between the tire and road. Alexander Varghese developed mathematical vehicle models in Matlab/Simulink® to study the effects of tire pressure on fuel consumption, vehicle handling, and ride characteristics. Increasing tire inflation pressures from 2 bar to 3 bar resulted in a fuel consumption reduction of up to 5% and improved vehicle handling. Kum-Gil Sung and Seung-Bok Choi analyzed the performance of an electrorheological (ER) fluid damper and found that tire pressure affected ride comfort, with higher pressures leading to improved vertical acceleration response. H. G. Lee et al. investigated the ride comfort characteristics of a quarter-vehicle magneto-rheological (MR) suspension system and found that tire pressure influenced vertical acceleration RMS of the sprung mass. Jin Gao and Peifeng Han built a rigid-flexible dynamics model and optimized suspension parameters to improve vehicle ride comfort, considering the effects of tire pressure on global and local vibrations.

What are the effect of tyre pressure on fuel consumptionn of motor vehicles?5 answersTyre pressure has a significant effect on fuel consumption in motor vehicles. Underinflated tyres can lead to a reduction in gas mileage and fuel efficiency. Ignoring or failing to correctly set the tyre pressure can affect the vehicle's fuel efficiency. In a study comparing the performance of a diesel engine fueled by tyre pyrolysis oil and diesel fuel, it was found that the brake thermal efficiency of the tyre pyrolysis oil-diesel blend decreased by 6 to 10%. However, the CO emissions were within permissible limits. Additionally, the addition of certain additives to fuel can reduce fuel consumption. Therefore, maintaining the correct tyre pressure and using appropriate fuel additives can help improve fuel efficiency in motor vehicles.

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