Problem 2 (30 Points) automotive e e engine Shown in figure 1. The oil used for lubricating the engine parts including the main bearing is You are requested to asset a proposed design for main bearing (sleeve) for an a 20W-50 supplied at 90 psi and sump temperature is 200 °F. The crank radius is 1.5 in while width is 1.75 in with a full annular grove of 0.25 in wide. The Diametral clearance 1/256 in Thrust- Rear Main journals journal bearing oil-seal surface Snout Timing-chain gear Rod journals or pins Oil slinger Counter weight Flywheel- mounting flange Note the following equations can be used for conversion Ten Tecx9/5+32 I reyn-689.5 10 CP Considering the following operating conditions: 1. Crank shaft speed: 2000 rpm 2. Load on the bearing: 4500 lbf Questions a. Does the design follow recommendation of load per unit area (Hint table 12-5). Show your calculation. P = W = 4500 ld (21.5) N=2.6 M reyn. [3 points] 1-2( and 89 XIC 5- Find Cala Additional Page for Problem #12 b. Determine the maximum oil temperature. Dose it exceed Trumpler's criterion? Hint assume AT-40 °F as first iteration. points] [16