492-525Bhp i Hk

[BendItLikeBender]

kor masse er 492-525bhp i Hk?

[Patz]

Det er 492-525 Hk, bhp står for brake horsepower, altså uten tapet forårsaket av girkasse osv.

[apegryn]

Bruker alle bhp når en oppgir hester? Synest å ha hørt at noen produsenter måler hk på andre måter enn andre, og derfor er ikke alltid hk reelt å sammenligne. Noen som vet noe om dette?

[Patz]

Det er mange som legger på en god del ja.

[Lada2103]

Er forresten BHP det samme som HK SAE? Vet at en del importører av blant annet japanske biler tidligere oppga hestekreftene i HK SAE. (Har kikket en del i pappas gamle årskavalkader utgitt av bladet Bil på 70-tallet).

[Jarbra]

Bilprodusenter måler i de aller fleste tilfeller hestekreftene på veiva, altså før tapet i girkasse og drivverk. Den reelle ytelsen vil derfor være noe lavere, rundt 5-10%.

 

hp (SAE)

 

In the United States the term "bhp" fell into disuse after the American Society of Automotive Engineers (SAE) recommended manufacturers use hp (SAE) to indicate the net power of the engine, given that particular car's complete engine installation. It measures engine power at the flywheel, not counting drivetrain losses.

 

Starting in 1971 automakers began to quote power in terms of SAE net horsepower (as defined by standard J1349). This reflected the rated power of the engine in as-installed trim, with all accessories and standard intake and exhaust systems. By 1972 U.S. carmakers quoted power exclusively in SAE net hp. The change was meant to 'deflate' power ratings to assuage the auto insurance industry and environmental and safety lobbies, as well as to obfuscate the power losses caused by emissions-control equipment.

 

SAE net ratings, while more accurate than gross ratings, still represent the engine's power at the flywheel. Contrary to some reports, it does not measure power at the drive wheels.

 

Because SAE gross ratings were applied liberally, at best, there is no precise conversion from gross to net. Comparison of gross and net ratings for unchanged engines show a variance of anywhere from 40 to 150 horsepower. The Chrysler 426 Hemi, for example, in 1971 carried a 425 hp gross rating (often considered to be underrated) and a net rating of 375 hp.

 

SAE-certified horsepower

 

In 2005, the Society of Automotive Engineers introduced a new test procedure (J2723) for engine horsepower and torque. The procedure eliminates some of the areas of flexibility in power measurement, and requires an independent observer present when engines are measured. The test is voluntary, but engines completing it can be advertised as "SAE-certified".

 

Many manufacturers began switching to the new rating immediately, often with surprising results. The rated output of Cadillac's supercharger Northstar V8 jumped from 440 hp (328 kW) to 469 hp (350 kW) under the new tests, while the rating for Toyota's Camry 3.0 L 1MZ-FE V6 fell from 210 hp (157 kW) to 190 hp (142 kW). The first engine certified under the new program was the 7.0 L LS7 used in the 2006 Chevrolet Corvette Z06. Certified power rose slightly from 500 hp (373 kW) to 505 hp (377 kW).

 

Les mer om hestekrefter her.

Endret 27. april 2006 av Jarbra