If i am in a gear and slow down but let the transmiss in that gear the wheels are capable of driving engine?

Question

The gears ride on bearings, so they spin on the differential shaft. If the engine is off but the car is coasting, the differential shaft can turn inside the gears while the gears and the layshaft are motionless.(so the gears, if i am in the third gear for example , don't spin the layshaft and the engine? what means then that is a engine brake?) Could then the wheel to spin the engine? thks

Answer 1

A manual transmission (stick shift) can turn the engine if you are already rolling, even if the engine itself has no power, since it has a direct mechanical connection between the engine and the wheels. This is how you roll-start the car. This also means that, if the engine dies, the power steering keeps working until the car actually stops (something autos can't do - when the engine dies in an auto, the transmission disconnects the drive wheels from the engine.)

PS: the gears and layshaft may ride on bearings, but they still have a solid connection to the drive wheels. Thus, if the car is moving, the gears inside the transmission are still spinning (movement goes from the wheels to the drive shaft to the gearbox output shaft, through the layshaft, into the input shaft, and then to the clutch.) The clutch (the only point of disconnection) comes between the gearbox and the engine. The only gear in which the layshaft doesn't have power going through it is 4th gear (1:1), since it is achieved by simply connecting the gearbox's input and output shafts (the power skips the layshaft altogether.) However, since gearboxes these days use constant-mesh gears, the layshaft will still be spinning, along with the input shaft (unless you're in neutral, but then the engine isn't even turning over.)

Engine braking is simply using the compression of the engine (whether off the gas, of with the engine turned off) to slow the vehicle. Diesel trucks also have a little extra help - called a J-brake or Jake-brake. This releases the compression as the piston reaches the top, so the added pressure from compression doesn't push the piston back down again. This basically doubles the effects of engine braking - and is much louder.

Answer 2

I have no idea what your real question is here, but yes, if the vehicle is moving, and in gear, the wheels are capable of turning over the engine. If the ignition is on, the engine will start.

Answer 3

Plain and simple, if the transmission is in gear, the clutch pedal isn't engaged, the ingition is off, and the vehicle is moving, the engine will turn.

I do hope English isn't you first language.

Answer 4

unfortunatly you'll a mechanic who became both no longer properly experienced or needs you funds worse than you do. both of it truly is genuine, you want a 2d opinion, he has informed you a lie. you are able to infact desire both pads and rotors, likely more suitable than that reckoning on the milage and condition of your vehicle. if that is the first time the brakes have needed service, and if the metallic area of the brake pad in no way made contact with the rotor, the rotors could manage to be machined and reused. if the brakes made a grinding noise you are able to infact favor to interchange the rotors. unfortunatly without seeing your vehicle in my opinion i cant inform you for particular. i have had various managers which will say almost something to make the sale, and also you want to be carefull the position you're taking your vehicle, a reliable mechanic will infact take you for your vehicle and coach you the project and clarify why you want to interchange those aspects if requested. you ought to in no way go away the save no longer information your issue and restore. on the down aspect utilizing the gears to decelerate or preserve % is effective yet save in ideas whenever you down shift you're utilizing your take carry of(s) so its type of a toss up, brakes vs. take carry of/trans. both way something is taking placed on. i desire replacing brake aspects myself less severe priced.

Answer 5

yes manual gearbox
also uses no fuel in an injection engine

Answer 6

all depends on what gear you in and how fast you are moving