"Rolling Resistance- Tips to reduce it"
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[ "Whatis Rolling Resistance and some tips to reduce it;Approximately 20 to 50percent of the energy is used by the car if there is increased resistance oftyres to roll. Thus, if by any chance the automotive engineers or tyreengineers can reduce the rolling resistance by at least 10 percent then, themileage of the car would improve by at least 3 percent.What is the cause of rolling resistance? As per the experts ofthe industry, approximately 1 percent to 5 percent of rolling resistance stemsfrom the drag of aerodynamics. Road friction is another cause that increasesthe rolling resistance by approximately 9 to 10 percent. The rest of therolling friction is caused by hysteresis of the material or internal friction.Nothing much can be done about the rolling resistance from aerodynamic lossesand road friction, but it can be reduced if we concentrate on the hysteresislosses or internal frictionGiven below is thelist of hysteretic losses and what can we do to reduce rolling resistance alongwith themInflation pressure: tyrepressure is one of the most vital factors in rolling resistance. With anincrease in pressure, the tyre continues to become circular and form a perfectcircle. This leads to a reduction in resistance. Gradually tyres also become astiff lead to reduced flexibility. Thus, the pressure of the;TyresSelby;should be optimum and not overinflatedSlip angle: it is theangle between the direction in which the car is travelling and the plane of thetyre. The slip angle usually increases when a car takes a corner. If the slipangle is high, the rolling resistance would also be higher. The drivingstability is significantly increased if the amount of planes in front of thewheel is angled towards the centreline of the vehicle. Nothing substantial canbe done to lower the resistance due to the slip angle. However, we can keep thealignment of the wheels intactLoad: there is an increase in the resistance on the road concerningload. If there is an increase in 1000lb of the cars load, then the rollingresistance also increases by at least 10lb. For knowing the perfect load foryour vehicle visit our reputed centre or visit our website through which youcan buy premium, budget and;cheap tyres onlineThe time required to reach equilibrium: the rolling resistance isat the lowest when the tyre is in thermal equilibrium. It takes some time toattain an equilibrium, and however, when it does, there is a reduction inrolling resistance by approximately 30 percent. Unfortunately, the majority ofthe trips made by cars are less than 20 minutes. Thus, equilibrium cannot bereached. One practical approach to establishing equilibrium is to change tyredesignsSpeed: If a person drives at a speed around 5 to 55 mph, then therolling resistance increases by nearly 1lb. If the speed reaches above theselimits, the rolling resistance gets increased. Thus lower speed limits prove tobe very helpful.Torque: if there is a slight amount of torque then rolling resistanceof the tyre also decreases. Thus, tyres usually have less rolling resistancewhen there is decelerating or accelerating. This factor cannot be exploited inpassenger cars; however, it can be used in trucks. The benefits of less rollingresistance would compensate for the frictional lossesTread depth: as the tyrestarts wearing, the rolling resistance also decreases. It is due to a reductionin the tyre material that rebounds and flexes. Unfortunately, several factorsaffect the wearing of the tyres, but the engineers are not able to takeadvantage due to reduced rolling resistanceRoad: one of the most significant causes of rolling resistance thathas still not been addressed is road deflection. Every vehicle presses down onthe road pushing it down. Thus the tyres are going up slightly" ]