EBK AUTOMOTIVE TECHNOLOGY
5th Edition
ISBN: 8220100659843
Author: Halderman
Publisher: PEARSON
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Chapter 33, Problem 4RQ
Why are forged pistons recommended for use in high-performance engines?
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1. An 11.1 liter, 6 cylinder, 4 stroke engine has a 120 mm bore and 125 mm stroke. If its compressions ratio is 16, what is the clearance volume? What is the engine displacement per minute if it runs at 2,000 rpm? If biogas, with an energy content of 4,500 Kcal/m3 will be fueled into the engine, what would be its power output (in KW) considering a 10% brake thermal efficiency?
A diesel engine four-stroke cycle with three cylinders has a cylinder bore of 89 mm and a stroke of 130 mm. The compression ratio is 16:1 and running at a speed of 2000 rpm. What is the piston displacement of the engine per cylinder?
Chapter 33 Solutions
EBK AUTOMOTIVE TECHNOLOGY
Ch. 33 - Prob. 1RQCh. 33 - How does piston pin offset control piston slap?Ch. 33 - Why are forged pistons recommended for use in...Ch. 33 - Prob. 6RQCh. 33 - How is the piston pin installed in the piston and...Ch. 33 - A hypereutectic piston __________. a. uses about...Ch. 33 - Many aluminum piston skirts are plated with...Ch. 33 - Prob. 3CQCh. 33 - Prob. 4CQCh. 33 - Prob. 5CQ
Ch. 33 - The space behind the ring is called __________. a....Ch. 33 - A misaligned connecting rod causes what type of...Ch. 33 - Side clearance is a measure taken between the...Ch. 33 - Piston ring gap is measured using a ____________....Ch. 33 - Which type of connecting rod needs to be heated to...
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- Taking into account only the thermal expansion, explain why both the "Block" of the engine (and therefore the cylinders), as the pistons must be made of different materials What relationship (<,>, =) must exist between the coefficient of expansion of the piston (??) and the coefficient of expansion of the cylinder (?? ) so that the engine performance is optimal at high temperatures?arrow_forward7. How do you designate the size of an engine? 8. What will be the total piston displacement in a two-cylinder 100 mm x 130 mm engine? 9. If each cylinder of the above engine has a clearance volume equal to one fifth of the total cylinder volume, then compute: a) the clearance volume; b) the compression ratio. 10. Sketch the operation of a four-stroke petrol engine, explaining the events at each stage. How will the events differ from those of a diesel engine? 11. Why is there a power stroke for every down stroke of piston travel in a two-stroke engine? At what interval does the power stroke occur in a four-stroke engine? 12. Assuming a firing order of I four-cylinder engine, complete the events in the other cylinders if the events for cylinder l'are as shown in Table 2.3. 3 2 for aarrow_forward(5): The advantage of the optimized size of the piston is that it requires less material so the cost of the material of the engine is reduced and space is also increased by reducing the size of the skirt.arrow_forward
- 2. Design a cast iron trunk type piston for a single acting four stroke engine developing 75 kW per cylinder when running at 600 r.p.m. The other avialable data is as follows: Maximum gas pressure = 4.8 N/mm2; Indicated mean effective pressure = 0.65 N/mm?; Mechanical efficiency = 95%; Radius of crank = 110 mm; Fuel consumption = 0.3 kg/BP/hr; Calorific value of fuel (higher) = 44 x 10°KJ/kg; Difference of temperatures at the centre and edges of the piston head = 200°C; Allowable stress for the material of the piston = 33.5 MPa; Allowable stress for the material of the piston rings and gudgeon pin = 80 MPa; Allowable bearing pressure on the piston barrel = 0.4 N/mm2 and allowable bearing pressure on the gudgeon pin = 17 N/mm2.arrow_forward3. A 4.0 L six-cylinder engine is operating at 3000 rpm. The engine has a compression ratio of 10:1, and volumetric efficiency of 0.85. If the bore and stroke are equal, what is the stroke, the mean piston speed, cylinder clearance volume, and air mass flow rate into the engine? Assume standard inlet conditions (Patm=101kPa and T=25°C)arrow_forwardTwo automobile engines have the same total displacement volume and the same total power produced within the cylinders. List the possible advantages of: (a) A V6 over a straight six. (b) A V8 over a V6. (c) A V6 over a V8. (d) An opposed cylinder four over a straight four. (e) An in-line six over an in-line four.arrow_forward
- A power producing equipment with a 4 cylinder, 4- stroke and operating in an air standard diesel cycle has a bore of 10cm and stroke of 12cm. Determine the engine displacement in each cycle.arrow_forwardLupiel, unswer the Jollowing questions. Friction 1. Lack of causes moving engine parts to overheat, tearing bits of metal from each other. (A) refrigerant (B) intake air (C) lubrication (D) exhaust back pressure 2. Friction causes all of the following issues in an engine, except: (A) hardened oil seals. (B) part wear. (C) decreased potential engine power. (D) heat. a Define friction.arrow_forwardDesign a five-liter car engine that operates on a four-stroke cycle. Decide what the design speed will be, and then give the number of cylinders, bore, stroke, piston rod length, average piston speed, imep, brake torque, fuel used, AF, and brake power, all at design speed. All parameter values should be within typical, reasonable values and should be consistent with the other values. State what assumptions you make (e.g., mechanical efficiency, volumetric efficiency, etc.)arrow_forward
- Explain giving arguments of a physical nature; the reason why when designing engines, a gap or space must be left between the pistons and the walls of the engine cylinders.arrow_forwardWhich does makes the volumetric efficiency of the reciprocating engine decrease? * Low cylinder head temperatures Improper valve timing Full throttle operation Sharp bends in the induction system High carburetor air temperatures When the piston reaches the bottom center it reverses direction and starts moving up on the compression stroke. TRUE OR FALSE? * Your answer What happens with the volumetric efficiency when the engine's heat increases? Your answer As an aircraft climbs, air density decreases, thereby decreasing the amount of air in the fuel/air mixture. This results in a vibrant air/fuel mixture which causes a reduction in engine power. TRUE OR FALSE? * Your answerarrow_forwardTask 1: Your first customer asked for an internal combustion engine to use it in a designed car. Your role is to describe the operation sequence of different types of available engines, explain their mechanical efficiency, and deliver a detailed technical report which includes the following steps: Evaluate the performance of a four-stroke, eight cylinder ideal Diesel cycle with a cylinder bore of 10 cm and a piston stroke of 12 cm when it is operated at 2200 rpm and 4 the air temperature at the beginning of compression prosses is 40 °C if the minimum volume enclosed in the cylinder is 5 percent of the maximum cylinder volume and the cut-off ratio is 1.7 by determining the delivered power from the engine and it's efficiency and comparing your answer if the engine is changed to be two stroke engine.arrow_forward
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