What happens when the driving gear is larger than the driven gear?
What happens when the driving gear is larger than the driven gear?
When the driving gear is larger than the driven gear, say the driving gear has 60 teeth and the driven gear has 30, then we multiply the velocity ratio by the RPM of the first gear. So 60/30=2, and if the driving gear was moving at a rate of 120 RPM, then the driven gear would be going at 240 RPM.
Can a car go 70mph in first gear?
Most any engine built in the last 30 (or so) years has electronic fuel injection. And these engines typically have a rev limiter. This generally prevents doing such things as driving 70mph in first gear (although it won’t prevent overreving as a result of a downshift).
How many teeth does it take to drive a gear?
The benefit to using gears with various teeth size is that you could move a gear with 25 teeth (driving) that will move a gear with 75 teeth (driven). So every three turns you do on your gear, the second gear will do one. This is done using the formula driven/driving=75/25=3.
How are pits formed in a driving gear?
As the pits form, the load shifts to adjacent areas which in turn pit, and which also can carry no load. The pits are at all times so large that the teeth cannot heal over with continued running. Thus, pitting proceeds over the tooth from zone to zone until the entire tooth is destroyed. Figure 3-129. Destructive Pitting.
Most any engine built in the last 30 (or so) years has electronic fuel injection. And these engines typically have a rev limiter. This generally prevents doing such things as driving 70mph in first gear (although it won’t prevent overreving as a result of a downshift).
Is it safe to drive in any gear?
The exact values car speed and the gear in which you are driving varies according to the engine you are driving. One should be more concerned about the engine speed (rpm) than the car speed. A car is prone to damage if you cross the red line on the engine speed meter, else you are safe to choose any gear for a given rpm.
How does driving high speed on low gear damage the car?
However driving in low gears continually will result in more wear and tear of engine compared to engine driven at lower rpms. Becuase for same ODO this engine has revved more causing more frictional wear and temperatures. This is only technical aspect how many people the flip car due to engine issues.
What’s the average 2nd gear speed of a car?
In fact, redline (6,000 RPM) for 2nd gear got you going at around 90 MPH. Maintaining such a high engine speed for long durations would definitely get things heated up a bit, but it’s nothing the car can’t handle as long as you don’t do it for too long or too often.
