Why does torque increase with bhp?

1: torque doesn't increase with bhp, bhp increases with torque. You see bhp is simply a mathematical equation for the amount of work done. Where as torque is the actual force applied. Bhp actually uses torque in it's equation (torque x RPM ÷ 5252 = hp).

2: crank shaft throw doesn't change, but cylinder pressure does (so does RPM as a result). More cylinder pressure = more torque, which in turn = more hp.

3: as I said in another post, its th design of the engine which effects torque curve. Air (being a fluid) flow a certain way. At low RPMs, an engine isn't breathing as well as it is at maximum efficiency. That's the reason why torque gradually increases as rpms increase rather than having full torque at 0 rpm.

1. The relationship is that BHP increases with torque. Power is proportional to the product of torque times rpm, so increasing torque 10% at any particular rpm increases BHP 10% at the same rpm. All power changes at any rpm are the direct result of torque changes.

2. For the same reason, torque always has to drop off ahead of the power curve. All points farther right of the curve have higher rpm (that is what the X axis is); if you had - for example - constant torque, the power would be a straight line rising steadily as rpm increased. As it is, factors in the engine (mostly valve issues) limit the engine speed and cause the torque to drop at higher rpm. This produces a torque peak with a power peak occurring later when the added rpm no longer compensates for the reduced torque.

A normal Torque/Hp curve for B Hp as RPM increase the torque will climb steady till the valves start to float Bhp is measured at the point when torque starts to fall. The engine torque (turning force at the flywheel) determines final Bhp You can't have Hp after torque has fallen.

An engine converts the chemical energy in fuel into mechanical energy. Torque and horsepower are measurements of energy. The amount of torque and horsepower an engine produces depends on how quickly it can burn fuel. It requires about 14 pounds of air to burn 1 pound of gasoline. If you just pumped in more fuel without more air you would just blow unburned fuel out the exhaust. Every revolution the engine takes in about 1/2 it's displacement of air (four stroke engines intake air every other revolution). A 3 liter engine takes in 1-1/2 liters of air every revolution. The higher the RPM the more air an engine sucks in and the more fuel it burns. More air, more fuel, more torque, more power.

A dynamometer is used to diploma torque. The torque examining is switched over to horsepower by utilising an consumer-friendly equation (you will could desire to renowned the revolutions (rpms) of the engine). Torque and horsepower could properly be examine at different factors measuring on the output shaft is often used even with the shown fact that, via inefficiency in pass of potential, the examining on the rear wheel would be below that of the output shaft. in case you advance the torque or the quantity of revolutions in line with minute you will advance the horsepower. you may regulate or advance torque by utilising changing camshaft profiles or the compression interior the cylinder (usually by utilising utilising a slimmer gasket). you may advance revs by utilising removing or changing the rev limiter, this supplies the possibility of destroying the engine, you're able to make it safer by utilising engaged on the valves (perspective, beginning time, length and place) it somewhat is mutually with camshaft profiles. you additionally can seem at extracting exhaust gases, freer flowing exhausts enable the gases to flee extra straight forward.

This is always a debate hope these helps There is no really "simple" explanation apart from the defintion which isn't an explanation.

http://www.team-bhp.com/forum/technical-stuff/1686...

http://www.epi-eng.com/piston_engine_technology/po...

http://www.car-videos.net/articles/horsepower_torq...