KOMPAS.com - Fuel consumption is not solely determined by engine capacity. There is no law, the greater engine capacity, the extravagant consumption of fuel. With the development of technology, these assumptions be broken.
For example, the Kijang Innova petrol family car as the most popular in Indonesia. Although the capacity of 2000 cc engines, greater than the Kijang Capsule, 1800 cc, Innova is more economical. But in terms of dimensions, Innova also greater.
The aerodynamics
Two main factors, body Innova better aerodynamics than the Capsule. The front of the Innova or more sloping term its cool, streamlined, compared Capsule. In addition, the surface is also more evenly body.
Thus, when the race vehicle, a wind barrier is lower. Energy required to move is not too large. Consequently, the amount of fuel needed to drive the vehicle. Other terms, the consumption of fuel so more economical.
Machine
Second factor is the way of technology or machinery plus moving components such as power transmission. To supply fuel to the engine, injection system using the Innova, while Capsule carburettor.
Terrible, the working machine is controlled by computer. In this way, the needs of engine fuel will regulated in accordance with the work load. When slow or light load, the amount of fuel that slightly. Conversely, on high speed, the amount of fuel that more.
fuel way valve to the engine room. Here, fuel or gasoline mixed with air by a machine. In the engine, air and fuel mix hold more 'friendly' again. After that, be (compression), with burned through the spark spark generated by the plug. Then, the explosion occurred and encourage piston engine and moved to the next transmission and wheels.
The benefits of injection systems, gasoline engines to the measure that has been determined based on various conditions around the engine. Including the number of air mass the engine, engine temperature and its parameters.
The engine is still in use carburettor, fuel based on opening the gas valve is operated through the gas pedal. Composition of the mixture may be difficult and not fitting in accordance with the stipulated conditions of work machine.
Technology on the other machine Innova is Variable Valve Timing-Intelligent (VVT-i). With this technology, a mixture of fuel and air into the engine is adjusted to the conditions of work cycles and engine load.
VVT-i engine lets up the number of air and fuel mixture with a set of time open and close valves optimally utilize the computer. Air flows into the machine efficiently.
Drive by Wire
Not only that, according to Achmad Rizal, Marcomm Manager of PT TAM, which was way injection Kijang, Innova engine technology development is very much compared to previous versions.
Described, Innova 2007 must meet emission standards Euro2. This must be done because the Kijang Innova and also exported to international emission standards.
For example, to set the lap machine or machines does not work using a conventional cable connecting the gas pedal to the throttle body or the gas valve. "Innova has been using drive by wire. In addition, a plug for a cylinder. The ability of a much more efficient. This is the Kijang Innova so create more economical, "he explained.
In fact, to follow the standard Euro2, Innova is also equipped with oxygen sensors plus catalyst (catalytic converter) to reduce waste gas emissions. The result, in addition to more economical, Kijang Innova petrol engine is also more friendly to the environment.
The problem, according to the engineers of this machine ITB graduates, the error is less Kijang drivers understand how to operate the pedal with the drive by wire system is. "At the beginning of the gas pedal is pressed, the reaction was slower machine than the cables. However, as already working, so fast. Well, because quite slow in the beginning, the drivers are often re-pressing gas pedal. As a result, of course, the fuel so wasteful, "explained.
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