Automotive Technology: Principles, Diagnosis, And Service (6th Edition) (halderman Automotive Series)
6th Edition
ISBN: 9780135257272
Author: James D. Halderman
Publisher: PEARSON
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Chapter 18, Problem 3RQ
To determine
Mention the strokes of a four-stroke cycle.
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The volume of air in a diesel engine cylinder at the end of suction stroke is 1000 cc
while the volume prevailing in the cylinder at the end of exhaust stroke is 150 cc.
The piston speed is found to be about 1200 m/min and the stroke to bore ratio is
1.2. If the engine develops power in every alternate rotations of the crankshaft,
determine the number of cycles per minute.
4.
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?
A
engine develops power output for each engine revolution. *
Your answer
The changes in the valve clearance on opposed-type engines using high lifters
are accomplished by rocker arm replacement. TRUE OR FALSE? *
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This is the power required to operate the engine components and move air into
and exhaust gasses out of the engine. *
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The order occurrence of five events of a four-stroke cycle engine is: *
intake, ignition, compression, power, exhaust
intake, ignition, compression, exhaust, power
intake, compression, ignition, power, exhaust
intake, power, compression, ignition, exhaust
intake, compression, ignition, exhaust, power
Chapter 18 Solutions
Automotive Technology: Principles, Diagnosis, And Service (6th Edition) (halderman Automotive Series)
Ch. 18 - How is the angle between power strokes determined?Ch. 18 - What brands of vehicles use horizontally opposed...Ch. 18 - Prob. 3RQCh. 18 - If an engine at sea level produces 100 hp, how...Ch. 18 - What is the definition of horsepower?Ch. 18 - The chemical energy in fuel is converted to heat...Ch. 18 - An SOHC V-8 engine has how many camshafts? a. One...Ch. 18 - Prob. 3CQCh. 18 - Torque is expressed in units of _______________....Ch. 18 - Horsepower is expressed in units of...
Ch. 18 - A normally aspirated automobile engine loses about...Ch. 18 - One cylinder of an automotive four-stroke cycle...Ch. 18 - How many rotations of the crankshaft are required...Ch. 18 - A rotating force is called ________________. a....Ch. 18 - Technician A says that a crankshaft determines the...
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- 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_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_forwardA 3630 New Holland Tractor has a four-cylinder four-stroke cycle engine. It has a cylinder bore of 8.89 cm, a stroke of 12.7 cm, and a compression ratio of 16.5:1. The tractor can develop 32 hp that can be used for field operation at 2000 rpm. Find the piston displacement (cubic centimeter) of the tractor engine, the total displacement volume (liters) of the tractor engine, the stroke to bore ratio and the piston speed (m/min) of the tractor engine.arrow_forward
- 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?arrow_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_forwardAn eight- cylinder, square, 4.2 L, S.l. engine, operates on a four-stroke cycle at 3200 RPM and compression ratio re of 10. At this condition the mechanical efficiency is 65% and 1200 J of indicated work is produced in each cylinder. It has a combustion efficiency of 98%, AF ratio of 12, and a heating value of 43 MJ/kg. Determine the following: (A) bore of the engine in cm, (B) specific volume in kW/cm², (C) output per displacement in hp/cm³, (D) frictional losses in kW, (E) mass flow rate of fuel in the engine in kg/hr, (F)brake specific fuel consumption in gm/kW-hr, (G) brake thermal efficiency, (F) for Merry Christmas) fuel conversion efficiency.arrow_forward
- An eight- cylinder, square, 4.2 L, S.l. engine, operates on a four-stroke cycle at 3200 RPM and compression ratio re of 10. At this condition the mechanical efficiency is 65% and 1200 J of indicated work is produced in each cylinder. It has a combustion efficiency of 98%, AF ratio of 12, and a heating value of 43 MJ/kg. Determine the following: (g) bore of the engine in cm, (h) specific volume in kW/cm², (i) output per displacement in hp/cm³, (i) frictional losses in kW, (j) mass flow rate of fuel in the engine in kg/hr, (k) brake specific fuel consumption in gm/kw-hr, (1) brake thermal efficiency, (m for Merry Christmas) fuel conversion efficiency.arrow_forwardA petrol engine produces 250 kW while using 1.014 kg of fuel per minute. The fuel has a lower heating value of 45000 kJ/kg, and the engine has bore of 100 mm and the stroke-to-bore ratio of 1.2. The clearance volume of the cylinder is 1.178x105 mm³. The friction power is found to be 10% of the power that engine produces. Sketch (your own) the simple neat and clean block diagram of the engine, clearly indicating the control volume and control surface, with all the given data displayed on it. For air take the value of y= 1.4. Determine the following: (a) The brake thermal efficiency (Np.th ). (b) The indicated thermal efficiency (7ind.th ). (c) The mechanical efficiency (Nmech ). (d) The brake engine efficiency (n,). (e) The indicated engine efficiency (7ind). (Hint: Engine efficiency is a function of how the ideal work or power is calculated. Frequently, the air-standard cycle is used for calculating the theoretical work.)arrow_forwardA six-cylinder has a 127 mm stroke and a 107.9 mm bore. According to engine specifications, the compression ratio should be 15.5:1. While overhauling the engine, the mechanic inadvertently installs a head gasket that is 1 mm too thick. Calculate the compression ratio of the engine with the thicker head gasket installed.arrow_forward
- B) Why A two stroke cycle engine gives double the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.arrow_forwardDESCRIBE THE PROCESSES AND CYCLES?arrow_forward3. An 8-cylinder, 450 mm x 600 mm, 4 stroke cycle diesel engine has an exhaust gas mass rate of 4.5 kg/kw-hr brake based on fuel having air-fuel ratio of 20 to 1 and heating value of 10,540 kcal/kg. Engine speed is 260 rpm with brake mean effective pressure of 9.25 kg/cm2 An estimated 22% energy loss is carried away by the jacket cooling water. Calculate the brake horsepower. B. 2011 BHP C. 2310 BHP D.2910 BHParrow_forward
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