Calculation of the joint forces at the joint
Course:- Mechanical Engineering
Reference No.:- EM13732633

Assignment Help
Assignment Help >> Mechanical Engineering

As per the requirement of the assignment we have to make a survey from the market about the competitive designs of small engine and about the current standards of designing of small engine and also the cost for making it. After completing the survey we have to design a small engine for a lawn mower.

This design mainly will be focused on the following key factors like-

• The design will be for a 4-stroke engine.
• Type of joint forces acting on the engine.
• Type of shaking / vibration forces acting on the engine components.
• All the details about the bore, crank length, stroke, and the connecting rod.

Some description about the engine: -

- Internal combustion engine (IC engine) is a mechanical device that use controlled explosion of air fuel (petrol, diesel, gasoline etc.) mixtures in order to produce power for the movement of the components and hence the movement of wheels.

- In a reciprocating engine (to and fro type engine) air fuel mixture explodes and forces the connecting piston to move up and down in a cylinder.

- The motion of piston inside the cylinder is transmitted to the crankshaft which ultimately transmits the same to the wheels via connecting rod.

- Firing order of a engine is the sequence of the strokes in function.

2. Calculation of joint forces with the variation of crank angle

1. Calculation of the joint forces at the joint of connecting rod and the crank shaft: -

Fc = force on the connecting rod

As by equating the horizontal components of the forces:

F x  cos β = F

Fc =  

As per the question, in intake process.     Lie between = 0-180degree

By this we have the value of Fc  is (F to -F)


Verified Expert

Preview Container content

The requirement of the assignment is to design a small engine for a lawn mower and the engine may of any type therefore I am choosing a 4-stroke internal combustion engine.
This assignment needs to be focused on the design of a small engine for a lawn mower after surveying from the market as this engine will be a reciprocating engine (to and fro type engine). This engine will be consisting of basically its working strokes and power system of the engine which will needed to be considered during its design.

In a suction stroke the piston inside the cylinder moves from the top dead centre to bottom dead centre and creates the suction inside the cylinder, due to the suction it sucks the air from the environment and taken in the cylinder. The air inside the cylinder is at very low pressure.

Put your comment

Ask Question & Get Answers from Experts
Browse some more (Mechanical Engineering) Materials
Compute the volume flow rate through the meter that will cause the mercury to flow into the throat. Note that for a given manometer deflection h, the left side will move dow
Consider horizontal pipe carrying water at 70 °F. It is given that the pressure drop over a 100-ft length of 1-in-diameter is 5.0 psig. Determine (a) the Reynolds number, (b)
Determine the mass flow rate of the air passing through this engine and the rates of heat addition and rejection when this engine produces 1000 hp. Assume constant specific
You are a software engineering manager and your team proposes that model-driven engineering should be used to develop a new system. What factors should you take into account
Clear span is 32 ft. Beam width b = 12 in., d = 22 in., f′c = 4000 psi, and fy = 60,000 psi. Determine the maximum spacing allowed for No. 3 single-loop stirrups at the critic
The ordinates of a 3hr unit hydrograph of a basin at 6 hr interval are given below. You are required to derive the storm hydrograph due to a 3 hr storm with a total rainfall
ME 255: Strength of Materials - system of steel pipes is loaded and supported as shown below. If the normal stress in each pipe must not exceed 150 MPa, determine the cross-
Use PIPE-FLO" to model a straight horizontal run of 100 ft of 1-in Schedule 40 pipe carrying 20 gal/min of 75°F water from a tank with a water level of 25 ft. Display the ca