Sentences with phrase «friction coefficient»

Nobody knows why, and we've heard theories from humidity to the friction coefficient of the material at certain temperatures and conditions, but the fact is a lot of glass - backed nexus 4 phones won't stay on it.

Note that in these two papers we not only derived wind velocities, but also theoretically determined turbulent friction coefficient — something in principle unachievable in conventional simulations (where this coefficient is parameterized).

The clutch located on the PTU has two functions: axial disk surfaces with a high friction coefficient are used to absorb synchronization energy; while a self - energizing, bi-directional wedge clutch supports high drive train torques.

This allows the system to prevent a wheel from spinning in extreme conditions on slippery road surfaces or when the two rear wheels are experiencing significant differences in friction coefficient.

It's more rugged, to accommodate higher torque, and its friction coefficient increases to adjust front / rear torque flow in quicker, more precise increments.

The traction assistance provided by the double - disc clutch is especially noticeable when the friction ratio between the tyres and the road is low, since the clutch locks the powertrain mechanically during moderate starting if the friction coefficient between the tyres and the road is less than µ = 0.3 (more or less equivalent to snow).

They are far lighter and have much higher friction coefficient and needs a total reworking of the servo system in order to avoid the horrible lurching stops the first gen systems were known for.

The new performance mode in the Audi drive select dynamic handling system enables adaptation of the most important ride dynamics parameters to the friction coefficient of the road.

Efficiency - improving measures include optimised underbody air ducting, wheel bearings with a lower friction coefficient and tyres with reduced rolling resistance.

Further improvements have been made in various areas, including the car's directional stability, the friction coefficient of the wheel bearings, tire noise and weight, which has been reduced by 4.4 pounds on the front suspension alone.

Tyre friction coefficient changes nonlinearly with vertical load.

When one of these cars enters a corner fast (with the gas pedal down) its rear wheels will lose traction (will have a tendency to spin) and the centrifugal force the car is subject to combined with the reduced friction coefficient to the rear wheels will lead their rear end off the curve.

The clutch plates in the four - wheel drive system now have a higher friction coefficient, which ensures even faster and more precise torque distribution to the front axle, while the rear axle still features a torque vectoring differential.

The rings are reaching their maximum friction coefficient at that time do to maximum distance traveled within the bore.

Although some surfaces have the friction coefficient of a banana skin, the amazing winter Michelins, attentive suspension, and astute electronic helpers bring about a surprise - free balance.

If this ratio reaches the friction coefficient (determined by the sand's properties), your hand will move.

Coulomb's equation states that in order to slide one hand against the other the shear stress — akin to the force applied to slide your hands — divided by the surrounding pressure — squeezing the sand together — must equal something called the friction coefficient.

The resulting apparent friction coefficient of 0.08 is considerably smaller than static values for most rocks.

On the flip side, all players uniforms are to be composed of materials for which this silicone oil has an exceedingly small friction coefficient.

«Now we can make a proper calculation of the friction coefficients,» says Makkonen.

The degree of lock — which may be anywhere between 0 and 100 percent — is adjusted as required within a fraction of a second, enabling wheel spin to be prevented on slippery surfaces, in instances where the right and left rear wheel have widely differing friction coefficients, in tight bends and when changing direction with particular vigor.

It is an active all - wheel - drive system that helps to ensure the optimal distribution of drive power for optimum traction in most road scenarios, whether on long straights, through tight corners, or on surfaces with different friction coefficients.

So where there are significant differences in friction coefficients between the right and left rear wheel, for example, optimum traction and maximum propulsion power are ensured.

The degree of lock — which may be anywhere between 0 and 100 per cent — is adjusted as required within a fraction of a second, enabling wheel spin to be prevented on slippery surfaces, in instances where the right and left rear wheel have widely differing friction coefficients, in tight bends and when changing direction with particular vigour.

Lowering friction coefficients in video game physics is a move that says now we are having fun!

Not exact matches

Put differently, the Cold War created a high coefficient of friction in the global economy.

In physics problems, an elephant on a river bank becomes a mass with a coefficient of friction, and a Beethoven symphony becomes a set of molecular vibrations.

Flexible Packaging recently caught up with Dave Muchorski, director of marketing at Testing Machines Inc., for an update on what's new in the field and how coefficient of friction can impact printing and converting operations.

Testing Machines Inc (TMI) has introduced a new, enhanced 32 - 76e coefficient of friction (COF) tester with added peel testing capabilities.

With no added plasticisers which might migrate and damage the parts, Tyvek ® is smooth with a low coefficient of friction, making it also ergonomically efficient.

I'm so glad that I'm not a slob sometimes, and that it's just viscosity, shear & the coefficient of friction... that's such a relief!

«The particular mixture ratio means that our composite has a very low coefficient of friction.

The icy plank and the tub bottom had a lower coefficient of friction than the dry wood and the tub.

Although the mass of the tub and gravity did not change, the coefficient of friction of the two ramp systems did.

A new technique used on gear tooth surfaces makes for a lower coefficient of friction when the gears engage.

On surfaces with a split coefficient of friction - patchy ice or standing water, for instance - DSC and Active Steering will compensate for the steering tug you feel as one set of tires grips harder than the other, which could be a lifesaver.

Basic physics tells us that friction is equal to the normal force times the coefficient of friction, i.e:

For one, the coefficient of friction decreases as the normal force increases (see this Wikipedia article for more details).

That and just overcoming the static friction of all the accessories upon initial startup, as well as the coefficient of friction of the belt itself will be lower when cold.

The carbon pads provide a more consistent coefficient of friction and even better fade resistance.

Appropriate coefficient of friction for most manual transmission synchronizers (other's synthetic gear oils are often too slippery for proper synchro engagement)

Maybe the electronic traction control is better but there are laws of physics limiting what power can be put to the ground (like coefficients of static, and dynamic, friction).

Depending on driving style and the coefficient of friction, it can send between 50 and 100 percent of the available torque to the rear axle, and when Audi drive select is in dynamic mode and the ESC Electronic Stabilisation Control system is in its sport setting, power is transferred to the rear sooner and in greater amounts for even greater agility and more direct turn - in.

Through an oil - temperature sensor, the SH - AWD ® Control Unit monitors the rear differential's clutch - plate coefficient of friction (that changes with temperature) in each clutch pack and then adjusts the voltage to each electromagnetic coil to compensate.

With reactive activation, which rarely occurs in practice, the system reacts to sudden changes in the coefficient of friction.

In dynamic mode, power is sent to the rear axle sooner and to a larger degree, improving the driving dynamics particularly at low coefficients of friction.

quattro all - wheel drive is more frequently active in winter than in summer because the coefficients of friction are lower then.

What's needed is a large flat VDA with a special asphalt formulation and a water - delivery system that can maintain a uniform depth of water (the approximate thickness of a quarter), so there's a consistent coefficient of friction across the entire surface.

The corresponding working quasilinear wave equation for the barotropic azonal stream function Ψm ′ of the forced waves with m = 6, 7, and 8 (m waves) with nonzero right - hand side (forcing + eddy friction) yields (34) u˜ ∂ ∂ x (∂ 2Ψm ′ ∂ x2 + ∂ 2Ψm ′ ∂ y2) + β˜ ∂ Ψm ′ ∂ x = 2Ω sin ϕ cos2 ϕT˜u˜ ∂ Tm ′ ∂ x − 2Ω sin ϕcos2 ϕHκu˜ ∂ hor, m ∂ x − (kha2 + kzH2)(∂ 2Ψm ′ ∂ x2 + ∂ 2Ψm ′ ∂ y2), [S3] where x = aλ and y = a ln -LSB-(1 + sin ϕ) / cos ϕ] are the coordinates of the Mercator projection of Earth's sphere, with λ as the longitude, H is the characteristic value of the atmospheric density vertical scale, T˜ is a constant reference temperature at the EBL, Tm ′ is the m component of azonal temperature at this level, u˜ = u ¯ / cos ϕ, κ is the ratio of the zonally averaged module of the geostrophic wind at the top of the PBL to that at the EBL (53), hor, m is the m component of the large - scale orography height, and kh and kz are the horizontal and vertical eddy diffusion coefficients.

The parameterizations, I think engineers generally call these the heat and mass transfer coefficients and friction factor correlations, might need to cover wide ranges of possible fluid and structure - interface conditions.