Mathematical Model and Experimental Evaluation of Drag Torque in Disengaged Wet Clutches

Table 7

Summary of the test specifications for model validation and experimental evaluation.

Test case/set	Parameters varied	Clutch ID (—)	No. of interfaces (—)	Initial flow rate (L⋅min^−1)	Rate of increase in flow rate (L⋅min^−1 rpm^−1)	ATF temperature (°C)	FDs speed (rpm)	SDs speed (rpm)
Model validation
1	ATF flow rate	𝐶-3	26	𝑄-1=2.2; 𝑄-2=4	𝑚-1=0.0012; 𝑚-2=0.0012	60	0–4500	0
2	ATF temperature	𝐶-3	26	4	0.0012	80	0–4500	0
3	Disks’ rotational state	𝐶-4	22	0.75	0.0002	60	FS0 = 0–5500; OR = 0–5500	FS0 = 0; OR = 0–(−5500)
Experimental evaluation
1	ATF flow rate	𝐶-3	26	𝑄-1=5.1; 𝑄-2=6.7; 𝑄-3=8.5	𝑚-1=0.0049; 𝑚-2=0.006; 𝑚-3=0.0085	60	0–4500	0
2	ATF temperature	𝐶-3	26	5.1-6.7-8.5	0.0049-0.0066-0.0085	𝑇-1=40; 𝑇-2=60; 𝑇-3=80	0–4500	0
3	Disks’ size	𝐶-1; 𝐶-2; 𝐶-3	1	1.7	0.0016	60	0–4500	0
4	Disks’ rotational state	𝐶-3	26	8.5	0.0085	80	ER = 0–3200; OR = 0–3200; FS0 = 0–3200	ER = 0–3200; OR = 0–(−3200); FS0 = 0