Initial Project Assessment Group 31

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What is the intended use of the product?

The product is defined as an in-line four-cylinder internal combustion engine belonging to a 1994 Honda CBR 600 F motorbike. http://www.bikez.com/motorcycles/honda_cbr_600_f_1994.php. The general use of an engine is to convert chemical energy stored in a fuel into mechanical energy. When combined with a transmission, wheels, and other components of the motorbike, this appears in the form of rotational energy, which provides forward motion and a means of transport.

Is this product for home or professional use?

Due to the engine belonging to a motorbike, it can be purchased for personal pleasure or for professional use. Motorbikes are popular, and are often used as a personal hobby or a simple source of transportation. The professional use for this engine is related to the motorbike it belongs to, and professional motorbike racing is an important use for this product.

What are the different functions of the product?

The main function of this engine is to power a motorbike by producing mechanical energy in a form of rotational energy. However, an engine can generally be used to convert some form of energy to torque. Therefore, this engine can be manipulated to provide energy in the form of torque to a different device or structure.


How do you think the product works?

The in-line four-cylinder internal combustion engine takes chemical energy stored in the fuel and converts it into mechanical energy. An internal combustion engine oxidizes the fuel with an oxidizer; usually air, inside a combustion chamber. The oxygen in the air is combined with the fuel and a spark, which causes the fuel to combust and expand. This expansion pushes a piston, which converts the energy in the expanding gas to rotational energy in a crankshaft. This energy is transferred to the transmission, and the combusted gasses are forced out of the engine, while new fuel and oxygen are brought in to repeat the process. This engine is a four cylinder engine, which means four cylinders are taking in fuel and oxygen and converting the chemical energy to rotational energy at once. The four cylinders balance the engine, and allow it to operate smoother than one, two, and three cylinder engines.

What types of energy are used?

As previously mentioned, this engine uses chemical energy from fuels. Along with thermal energy from the expanding gases and friction from the moving parts, engines can generate mechanical energy. Engines also use electrical energy, in the form of a spark to ignite the fuel. Thus, electrical, chemical, thermal, and mechanical energies are involved in the operation of this engine.

How are these different types of energies transformed and modified?

The electrical energy provides thermal energy to begin combustion and convert the chemical energy provided from the fuel into thermal energy in the combustion chamber. Finally, the thermal energy is then applied to a component, which generates mechanical energy in the form of rotation, or simply motion.


Is the product currently functioning?

The purpose of an engine is not to function independently. The engine is not installed in the Honda motorbike it belongs to; therefore it will not have an ignition to function or a means to acquire fuel. This engine would not be able to function unless it was properly installed in the motorbike. Thus, in the engine’s current state, it is not functioning. In addition, further inspection by the group showed that most components were affected by wear and tear, however were still intact.

How well does it run?

As previously mentioned, an engine cannot function independently. Therefore, without both the ignition of the motorbike and a way to provide fuel, it would not be possible to determine how well the engine runs.

If there are any problems, where do you think they are coming from?

An engine has many different components that work together to produce mechanical energy. Some parts require regular maintenance while others have to be replaced over long periods of wear and tear. One can only determine if the engine is functioning properly while it is installed in the motorbike. Also certain components needed to run the bike were not present. Only the engine of the motorbike was handed to the group. Therefore, certain parts can only be analyzed if the engine is functioning improperly.


How complex is the product?

There are many complex parts that all have to be in harmony with one another in order for the whole machine to work correctly. Some of the parts include the head, crankcase, pistons, cylinders, rods, bearings, cam chain, crankshaft, exhaust port, intake port, air intake, spark plugs, fuel injectors, camshafts, valves, valve springs, seals, gaskets, rings, nuts, bolts and many more parts.

How many components are used?

Almost all the components of our engine are internal, and so it is very hard to estimate the number of them. However we are sure of around 20 separate major components which are in our engine.

How complex are the individual parts?

The majority of the components in an engine are fairly complex, judged mostly by how hard they are to create. Engine parts have to be certain shapes, have special characteristics, and the measuring that goes into creating them has to be very precise. While most of the operation of an engine seems to be based on simple theory, it is a complex process to put an engine together. Some components of the engine must are in location complementing other components. Therefore, the assembly of the engine is also complex in relationship to the parts themselves, complexity can include springs, grooves, and fixed shapes with little to no tolerance of movement. Because, the components are designed to not fail during operation, the complexity of assembly should complement the difficulty of removal of the components.


What materials are used in the product?

Based on previous knowledge of engines, we are assuming the materials of our engine to be cast iron, steel, heat resistant plastic, copper, and rubber for fuel lines.

What Materials are clearly visible from the outside?

From the outside we can identify every material mentioned above, including cast iron used for the block, steel for the head, heat resistant plastic for the air inlet, copper piping, and rubber fuel lines. Oil and grease is also used for the lubrication for moving parts such as the pistons.

What materials are present but hidden?

We are assuming that all the materials in the engine have already been mentioned. We estimate that cast iron and steel will become the primary materials once we open our engine and examine the internal workings.


If you had to use this product, would you be happy with it?

To like this product, a person would need to enjoy motorcycles and more specifically ones oriented towards speed, acceleration rate or handling etc. Maintenance can be provided from most mechanic shops, therefore regular maintenance is easily accessible.

Is this product comfortable to use?

By itself this product is very uncomfortable. However, when used in conjunction with a seat, frame, and wheels as a motorcycle, it can be very comfortable. Also the heat, vibration and noise produced is minimal. So it does not really hamper the comfort of the rider much while driving. However, some riders may not find the constant leaning posture of riding a motorcycle comfortable. Therefore, riding for long periods of time can result in aches and pains or bad posture.

Is this product easy to use?

The main operation of this engine is centered on starting, accelerating, and maintaining speed. Ignition on bikes of this sort usually involves an electric start triggered by an easy to utilize button on the handlebars. To accelerate, a rider applies torque to the right handlebar, the throttle, which rotates and provides more fuel to the engine for speed. Maintaining speed is done by simply keeping the fuel intake constant by holding the throttle constant. Moderate hand and foot coordination will be required for the proper use of this product. Difficulty would decrease as experience is gained.

Does this product require regular maintenance?

The constant motion of the pistons, crankshaft, and other components does cause damage to the engine which may need regular inspection or repair. Some components of the engine, such as spark plugs and air filters do require regular changing. Components such as these are designed and assembled for easier removal. Most major internal parts, however, would be much more difficult to reach and in most cases require the professional help.

What alternatives to your product are there?

There are many makes and models of motorcycles being produced and bought across the United States and the world. Kawasaki, Harley Davidson, and Moto are just three of hundreds of competitors of Honda, and within Honda dozens of different models are made each year, such as the Honda ANF 125i Innova and the Honda CB1000R, both produced at the same time as our motor. Comparably, our product, the engine of a Honda 1994 Honda CBR 600, is rated very high.

What are the differences is cost?

The price of a ’95Honda CBR 600, which is closely identified with the ’94 version, is $7299. That is comparable to a ‘95 Suzuki of comparable displacement and similar weight with the same base horsepower as our engine, which was sold at $6699.

What are the advantages?

The Honda CBR 600 F can produce 100hp at 12000rpm. At only 599 ccm that is a lot of horsepower compared to other bikes in the same class. Also because of the use of this engine on a motorcycle, it can run a ¼ mile in 11.317 seconds at 119 mph. The engine is very small and compact as well as lightweight and yields immense power to provide optimum performance when put in use. In result, the engine has a good weight to power ratio and is efficient.

What are the disadvantages?

The main disadvantage is that it produces minimum torque. This is a general disadvantage because torque is very important in racing applications; but in our case the engine and bike combined are very light so the torque produced by this engine is large. Revving to achieve maximum power at 12000 rpms can take a toll on the engine as time goes on. Compared to car engines that reach peak power at approximately 7000 or 8000 rpms. The friction and the fast moving parts are the main culprit of the decreased engine life.