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Hic

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  • 2 weeks later...

Ne obrnuto je. DTorque je mjereni torque na kotacima. Torque je Roller torque, moment na samim valjcima (ali on ovisi o opsegu gume), pa da bi to izbacili, moramo dati tocne okretaje motora dynu, i onda se dobije tocan mjereni moment na kotacima, Derived Torque.

Znaci, najtocnije je dtorque i whp. Problem je kaj treba kliknut svaki put prilikom printa na dtq a ja ponekad ne kliknem, jer je vjecno guzva i zurba.

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Pise tocno u onom pdf-u. Oba su mjerena. Cekaj sad cu quotati taj dio, pa da vidis sam. Kvaka je u tome da se izbaci opseg kotaca kao varijabla, ,a za to se moraju znati okretaji motora.

 

 

When the term Roller Torque is used, this means we are measuring Torque from a Load Cell that is attached in some fashion to the Retarder (Eddy Current Retarder/PAU) that is coupled to the Drive Rollers (the knurled rollers). The Retarder applies a braking force to the Rollers, and since the Retarder Frame is restrained from turning by the Load Cell, the force is transferred into the Load Cell which measures force in typically Kg or pounds force. The length of the arm the Load Cell is attached to is precisely known, so, with force over a given length, we can determine “Torque” in Nm or Ft/lbs.

Roller RPM is usually measured by an Inductive speed sensor of some type, or a Shaft Encoder, or in the old days on a Vane Dyno, a Tacho generator.

These two inputs are used by the Dynamometer Control System to calculate the Power.

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OVo je dodatak,ali ustvari MORAS procitati prve tri stranice PDF-a i sve ce ti biti kristalno jasno: In order to simplify the Torque values even further, both Dyno Manufactures have what we term “Derived Torque”, which is a calculated value based of RWKW and “Engine

RPM”, this calculated “Derived Torque” takes any gear multiplication out of the equation, so one very good way of using Derived Torque is, if you have a particular car that had 3.46 diff gears, and has now been changed to 3.7, the Derived Torque value will not be affected, whereas the Roller Torque will, due to the fact the overall gearing of the car has changed.

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Kao sto vidis iz ovoga,bez obzira na promjenu diffa,multiplikatora, getribe, ako imas zadane i poznate vrijednosti brzine valjka, opsega, te okretaja motora, tvoj MOMENT NA KOTACIMA ce biti isti, bez obzira sto ce se moment na valjcima (roller torque) promjeniti.

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to mi je jasno, kao što rekoh, nije neka nauka - s obzirom da se valjci i kotač auta ponašaju u principu kao tarni prijenos, više-manje fiksnog omjera (nećemo ići u detalje i mjerit deformaciju opsega gume usljed opterećenja). ono što me zanima me jest kako se "mjeri" stupanj korisnosti tog nazovimo ga tarnog prijenosa koji je po defaultu nekih 0.75-0.95? jer jedan dio snage se troši na elastičnu deformaciju tarenica, a jedan mali i na proklizavanje.

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Ne kuzim zasto se uvijek samo prica o konjazi i dobicima, sta nikome nije bitno kvaliteta same mape, sigurnost za motor itd?

 

Rade bi mozda imao 10ks manje pa s mapom napravio 100 000 bez briga, nego otvorio do ibera sam da mogu rec da imam vise konja nego netko drugi ili otvori koliko ide sam da bude brzi..

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Pa zasto mislis da je mapa losa ili nesigurna?

 

Imas li nekoga nezadovoljnog poslom? Da se nesto dogodilo?

 

Dovedi ga ovamo pa neka kaze.

 

Od tisuca auti kroz sve ove godine, samo je dvoje ljudi bilo nezadovoljno, ali ne i u steti. Ako znas, rado bi da se jave pa da vratimo novac ili popravimo o nasem trosku.

 

Inace, kad ne valja tuning, onda ne valja nista. A ne samo snaga/moment.

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