- #1
marellasunny
- 255
- 3
During the short period of engagement of the friction clutch(say t=1sec),energy is obviously lost as heat.I've been asked to calculate this loss of heat by my teacher.
I've been given:
1.Input power(engine)= 50kW
2.Slip decreases linearly with time
3.Engagement process time,t=1sec
Now,I know how to go about solving the problem. It involves integration of the following eq.:
$$Heat loss=\int_{0second}^{1 second}P_{loss}.dt$$
But,the question is related to the slip of the clutch.Is the slip of the clutch equal to 1 at time t=0(i.e when I start releasing my foot from the clutch pedal and the pressure plate just starts to scrape the flywheel plate)? So,if I were to draw a graph of the slip 's' on the y-axis and time of engagement 't' on the x-axis,I would be drawing a straight line with a negative slope. Also,would the clutch slip when its fully engaged?
This is the equation of slip as a function of engine speeds(THIS I UNDERSTAND):
$$slip=\frac{n_{engine}-n_{output/clutch pressure plate}}{n_{engine}}$$
This is the equation of the slip as a function of the engagement time(I DO NOT KNOW WHAT TO PLUG IN HERE):
$$s=-\frac{ds}{dt}t+c$$
s-slip
c-intercept on slip axis (IS c=1??)
I've been given:
1.Input power(engine)= 50kW
2.Slip decreases linearly with time
3.Engagement process time,t=1sec
Now,I know how to go about solving the problem. It involves integration of the following eq.:
$$Heat loss=\int_{0second}^{1 second}P_{loss}.dt$$
But,the question is related to the slip of the clutch.Is the slip of the clutch equal to 1 at time t=0(i.e when I start releasing my foot from the clutch pedal and the pressure plate just starts to scrape the flywheel plate)? So,if I were to draw a graph of the slip 's' on the y-axis and time of engagement 't' on the x-axis,I would be drawing a straight line with a negative slope. Also,would the clutch slip when its fully engaged?
This is the equation of slip as a function of engine speeds(THIS I UNDERSTAND):
$$slip=\frac{n_{engine}-n_{output/clutch pressure plate}}{n_{engine}}$$
This is the equation of the slip as a function of the engagement time(I DO NOT KNOW WHAT TO PLUG IN HERE):
$$s=-\frac{ds}{dt}t+c$$
s-slip
c-intercept on slip axis (IS c=1??)