VTEC is one of Honda's greatest inventions. Though an undisputed expert in turbocharging as evidenced by years of Formula-1 domination while Honda was active in the sport, Honda's engineers feels that turbocharging has disadvantages, primarily bad fuel economy, which made it not totally suitable for street use. At the same time, the advantages of working with smaller engines meant that smaller capacity engines with as high power output as possible (i.e. very high specific-output engines) are desirable for street engines. Vtec stands for Variable Valve Timing and lift Electronic Control. VTEC has many different types of engines. they come in DOHC Vtec, SOHC Vtec,-E, 3-stage Vtec, i-Vtec, K Series, R-Vtec, i-Vtec with variable cylinder management, i-Vtec, aVtec, and Vtec in motorcycles. All these different types have a different type of job and power they put out. All of the engines are 4 cylinders. At low RPM, the ecru uses the low lift profile, releasing the synchronized pin to disengage the central rocker arm. This allows the camshaft lobes to actuate only the outer rocker arms, opening the valves less to provide better fuel efficiency in low power. As the engine speed increases the ecu engages the switch to lock the central rocker arm into the second high lift profile. As the extenuated central cam shaft lobe depresses the central rocker arm, the valves open farther to allow additional fuel and air into the cylinder. additional air/fuel mixer inhaled by the motor provides a stronger combustion, which in turn increases power at the expense of higher fuel consumption. Do Vtec engines require extra maintenance? Yes, Vtec engines do require extra maintenance. If you want your engine at its top performance you have to keep it maintained regularly. You have to stay on top of its tune ups, check transmission oil, clean bay, and overall just keep on top of its check ups. The engine gives about 27 miles per gallon in the city, and about 34 on the highway. One of the only disadvantages is that, for being a 4 cylinder engine, it uses the expensive octane gasoline. One of the advantages that vtec gives over a standard engine is the addition of a second power curve created by the hi-cam lobes. a typical engine begins to lose power at the top of its rpm range, but a vtec engine is given a 2nd power curve increasing its ability to make power at higher rpms. Vtec usually "kicks in" at 3500 rpms. VTEC, the original Honda variable valve control system, originated from REV ,introduced on the CBR 400 in 1983 known as HYPER VTEC. In the regular four-stroke automobile engine, the intake and exhaust valves are actuated by lobes on a camshaft. The shape of…
contribution margin, to just cover short-term variable costs, what consequences could it experience? (5 marks)
If Wilkerson were to cut costs based on contribution margin, it is actually using variable costing method. Under Variable costing method, products costs such as variable manufacturing costs are capitalized. In contrast, period costs such as fixed costs are expensed. In this particular case, direct material and direct labour are variable costs that will be capitalized. In fact, they are…
Wednesday June 10,2015
Co-founders Gabe Newell and Mike Harrington, whom both had experience in operating systems and software, founded valve in 1996. Gabe Newell who had previously worked with Microsoft wanted to leave the company to create a more interesting company that allowed for freedom and creativity. Together they wanted to start a video game company with games that could be played anywhere rather than strictly video games. Valve currently offers games that…
are 4 main windows (along with the menus up top):
1. Results – Where Stata will print out any analysis output or communication (such as error messages)
2. Command – Where the user enters commands for Stata to run analyses.
3. Variables – This window will list the variables that have been entered into Stata
4. Review – This window displays the commands that Stata has processed
There are many ways to bring data into Stata. The two ways most often used in this class are: i) by…
budgeted profit and loss in different scenario as per the case study through the Variable costing method.
Variable costing method varies with the production cost. More the cost of production more will be the variable cost and vice versa. Besides, under such costing method it ignores the Fixed Overhead.
Graph of variable cost
Some advantages of using such a method are as follow:
* While using the Variable costing method, changes in inventories does not affect the profit for a period of…
Functions of Several Variables
Functions of Several Variables
A real-value function of f of x, y, z, … is a rule for manufacturing a new
number, written f(x, y, z …), from the values of a sequence of independent
variables (x, y, z, …) .
f ( x, y ) x 2 y 2 4 x 1
Example: Function of 2 variables
For the function f, evaluate.
f (2,1) 22 12 4 2 1 2
Substitute 2 for x and 1 for y.
f (a, 5) a 5 4 a 1 a 2 4a 26
f ( x …
procedure at a later time. Variables: Scientists use experiments to search for relationships in nature and find answers to their questions. In other words, they design experiments to test if a change in one quantity or factor will affect another factor in the way their hypothesis predicted. These changing quantities are called variables. A variable is any factor or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and…
Muskan Hossain 8B
Science Fair Project
Are boys better than girls at following instructions, does age have an effect?
: The gender being tested, the age of the person
: The Instructions
: The gender who followed the instructions the best
: The objective of this experiment is to ascertain if there are differences in the ability to follow
instructions, between genders and ages.
Test each participant separately…
The Importance of Time Management
Timings for everything are important, but remarkably more important in the military for a uncountable amount of reasons because they allow for such things that the British Army needs to thrive such as structure/planning, being reliable/dependability and efficiency. Not adhering to timings could cause a break in trust and respect already gained with comrades and anyone in your chain of command, also could produce a lack of confidence in others perception in myself…
1101IBA – Management Concepts
Literature Review and Report
Valve Case Study
Muhammad Rabani b. Shamsul Khairil
Semester 2, 2012
1 583 words
Table of Content
1. Introduction 3
2. Problem Identification 3
3. Analysis 4
3.1 Vertical Organisation…