Cylinder Exhaust

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Cylinder Exhaust
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The main difference in fuel injection and a carburetor in an engine is fuel economy. In an automobile with a computer controlled fuel and firing system, the fuel is injected directly into the cylinder at just the right time. This atomized system helps in combustion by giving a more efficient and complete burn. Though carburetors have been around for a long period of time, being improved over the years, there is only so much that can be done with the design.

The carburetor has an intricate design of reservoirs, passages, jets, diaphragms and gaskets. The float and needle regulate how much fuel is held in the reservoir. The air flowing through the throat into the intake creates a vacuum that draws the fuel from the reservoir, through jets, into the air, flowing into the intake manifold. The rush of air flowing through passages in the intake helps the fuel mist to mix with the air before it flows into any available cylinder. It all sounds good, and it is, but one cylinder gets a little more fuel and less air than another.

The fuel injection system, on the other hand, is actually quite simple. Fuel is forced under pressure, through a fuel supply line to the injectors. The computer tells each injector when to open, and the fuel is then released into the cylinder. The fuel injector is made to atomize the fuel as it passes through, and the fuel that's under pressure helps the atomization. Each cylinder virtually receives the same amount of fuel, which means the fuel is burned more completely thus increasing fuel economy.

In addition to the fuel economy of the injectors, the computer control system also consists of several sensors that are strategically placed on the engine, that help the computer determine how much fuel to release into the cylinders. For example, the oxygen sensor, which is placed in the exhaust, tells the computer how much oxygen, as well as other gases, is in the exhaust, and it adjusts the fuel injected into the cylinder to produce the correct balance of exhaust gases. Overall, the carburetor or the fuel injection system will work sufficiently to power the vehicle. The fuel injection system will generally do it more efficiently.

Bond Mejeh produces automotive related articles for Quick Cash Auto, a cash for cars service. Quick Cash Auto not only buys pre-owned vehicles of any year, make or model, but they also provide numerous articles about vehicle repair and automotive news.

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New Eight-cylinder Engine for Bmw M3 Models

The BMW M3, the Munich-based automaker's sports version of the popular BMW 3-Series compact luxury car will have something new under its sleek hood. BMW Group has recently launched the details of its new V8 engine for the M3 2-door sports coupe and convertible models.

The new 3.2-liter straight six V8 engine features 8-cylinders, which is the first time for the BMW M3 models. With more cylinders and a larger displacement capacity, this new engine for BMW M3 offers an excellent and powerful performance at 430 horsepower and 295 lb.-ft. amount of peak torque, marking its sports car characteristics. Although the new V8 offers a powerful vehicle performance, the engine also offers lower exhaust emissions just like the sports car's competitor, the Mercedes-Benz C55 AMG that also features cleaner emissions on its Mercedes Benz exhaust. In fact, the new V8 engine complies with the most stringent EURO 4 emissions standard, and earns the LEV II (low emission vehicle) certification.

The new BMW M3 V8 achieved this low exhaust emission certification because of the engine's powertrain technology like the variable double-VANOS camshaft management, fuel injection system, and the brake energy regeneration that enhances the BMW M3 V8 engine's efficiency and driving dynamics.

Meanwhile, here are the complete engine specifications from a BMW official press release of the new BMW M3 V8:

- First eight-cylinder for the BMW M3 sports car.

- Supreme performance ensured by 309 kW/420 hp from 4.0 litres.

- Maximum torque of 400 Newton-metres (295 lb-ft) at 3, 900 rpm, 85 per cent of maximum torque over a speed range of 6,500 rpm.

- Unique thrust and muscle ensured by consistent implementation of the M high-speed engine concept, maximum engine speed 8,300 rpm.

- Consistent lightweight construction of engine and ancillary units, new V8 power unit one of the lightest eight-cylinders in the world, lighter than the straight-six power unit in the former model.

- Variable camshaft control, low-pressure double-VANOS for an optimum charge cycle, system offering full power and performance even with normal engine oil pressure.

- Eight individual throttle butterflies for spontaneous engine response.

- Consistent and reliable oil supply with longitudinal and lateral acceleration up to 1.4 g ensured by two oil pumps and wet sump oil lubrication optimised for supreme dynamic behaviour.

- Exhaust system optimising cylinder charge, optimised for weight and function by means of internal high-pressure remoulding, exhaust emissions fulfil EU4 and LEV 2 standards.

- Upgraded MSS60 engine control unit for optimum coordination of all engine functions with the various control systems in the car.

- Ion flow technology recognising and distinguishing engine knocking phenomena as well as misfiring and miscombustion by measurement of ion flow in the combustion chambers.

- Brake Energy Regeneration with intelligent alternator control.

About the Author

Dwyane Thomas is a part time cook and full-time auto-enthusiast. This 31-year old Civil and Environmental graduate is a consultant at one of the engineering firms in Pennsylvania.

Does your 2008 4 cylinder Ford Escape have a very loud emission/exhaust system?

Stepping on the gas in cold weather creates a sound like a race car winding up. The noise is tiresome, irritating and is actually embarrassing. We've brought it back and Ford says it is running fine; there's nothing wrong. They agree it is loud but there is nothing that can be done about it, unless there is a recall. They also fired up a few more of the same vehicles and even agree that they are very loud. Any suggestions or comments? Thanks

if they the other escapes are loud that means that it is normal

1992 Toyota Paseo 2 door coupe from North America - Comments
I had to change the clutch, clutch master cylinder, water pump, radiator, lots of different seals and gaskets, and this list can go on and on. The car picks up speed pretty quick.. but in general lacks performance..

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