The control of exhaust emissions is a multi-system task. The multiple systems involved are the oxygen sensors, the EGR (Exhaust Gas Return) valve, the catalytic converter and the muffler/tailpipe.

The oxygen sensors help in the control of exhaust emissions by sensing if there is either too much oxygen or too much combustible fuel being released from the engine in the exhaust gas. Depending on whether the engine is burning too rich or too lean the cars computer will adjust the air/fuel mixture allowed at the intake system.

The EGR valve aids in the control of exhaust emissions by measuring the amount of combustible vapors being released from the cylinders at the point of the exhaust manifold after the combustion process but before the exhaust gasses have reached the main line of the exhaust system. It is determined there is a high enough level of combustible vapors contained within the exhaust gasses to support combustion, the EGR valve will return a portion of the exhaust gasses to the cylinders for combustion through the intake system.

The catalytic converters role in the control of exhaust emissions is to catalyze the hydrocarbons and carbon monoxide in the exhaust gasses. The catalytic converter is the box with the appearance of a muffler installed in the exhaust line after the exhaust manifolds, EGR valve and oxygen sensors, but before the muffler/tailpipe. The catalytic converter consists of a chamber containing platinum or palladium pellets or honeycomb design. When the exhaust gasses pass through the catalytic converter and across the chamber with platinum or palladium pellets or a honeycomb design the hydrocarbons and carbon monoxide are catalyzed into carbon dioxide and H2O.

A muffler is usually located under the car near the bumper at the rear; semi or diesel trucks regularly use a vertically mounted pipe system on the cab. A muffler consists of a box usually constructed with rows of baffles designed to evaporate the H2O catalyzed in the catalytic converter and one or more tailpipes used to reduce noise pollution.

The exhaust system of an automobile is the last system in the defense against harmful emissions and pollution of the Earths atmosphere. The exhaust system does have multiple tasks or more specifically multiple smaller systems that together work for the control of exhaust emissions.

It is very important to have a properly functioning exhaust system if you wish to help limit, reduce or even eliminate the pollution of the Earths atmosphere and stop global warming. If your exhaust system on your car is not functioning properly, you will be contributing to the destruction of Mother Earth.

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When fuel is burned in automobile engines at high temperatures, nitrogen oxides emissions are created. More than half of all nitrogen oxides emissions in the United States of America are caused by both on-road and non-road mobile sources which are a major polluter of nitrogen oxides emissions. Because of these facts, it is understandable that there is an immediate need for the control of nitrogen oxides emissions.

By the ability of nitrogen oxides to travel long distances, they are the cause of a wide variety of environmental and health concerns far from the sources of their emissions. The control of nitrogen oxides emissions is needed. When nitrogen oxides, hydrocarbons and sunlight are combined, the product is smog and ozone depletion. On high smog days, you will have difficulty seeing objects far away as well as having trouble breathing. In addition, the control of nitrogen oxides emissions is needed because they are a contributing factor to the formation of particulate matter in the atmosphere through chemical reaction with atmospheric gasses.

Nitrogen oxides also known as NOx is a generalized term for a family of colourless and odourless gasses, all containing various levels of, which are highly reactive. Nitrogen dioxide, another common chemical known for pollution, along with many air particles combine into a layer of brownish red tones. This filmy layer often can be seen over many large cities.

Particulate Matter also known as PM are tiny particles or liquid droplets that become suspended in the air containing a wide range of chemicals. Larger particles become visible as smoke or dust and settle from their suspension in the air rapidly. The most harmful to human health are the smallest particles, which can be suspended for long periods. These smallest particles can penetrate deep into lungs. Particles directly emitted into the air come from a variety of sources including buses, trucks and cars. In addition to vehicle pollution, other sources may include construction sites, factories unpaved roads and different wood burning items.

Particulate Matter 2.5 known as PM2.5 but often referred to as “PM fine” are particles that have a diameter less than 2.5 microns and make up the majority of particulate matter from mobile sources. PM fine particles are not usually visible with your eyes because they are so small are significant contributors to haze in the atmosphere. Because they can penetrate deeper into the lungs than larger particles, the smaller the particles the more harmful to humans.

Particulate filters are an anti-pollution filter device designed to trap particles in the exhaust from diesel engines before they enter the atmosphere.

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Diesel-powered vehicles are the backbones of all industry in the U.S.A. today making diesel emissions control a very important consideration of industry. Not unlike gasoline burning engines in cars, the diesel engine industry is also under regulatory action for diesel emissions control. The primary ingredient in the thick, black diesel exhaust is what we know as particulate matter (PM10) or commonly known as diesel soot. Common diesel emissions control concerns are chemicals like nitric oxide, nitrogen dioxide, sulfur dioxide, aldehydes, primarily formaldehyde, acetaldehyde and acrolein and various hydrocarbons particles. In addition, present in diesel exhaust is carbon monoxide. More important is the fact that the higher the combustion temperature of a diesel engine the higher the emissions of nitrogen oxides. This means that a diesel engine can and normally does emit more oxides of nitrogen pollutants than a gasoline engine

Particulate matter is a serious health issue along with being an aesthetic concern. Because it is in such a small form, particulate matter is easily inhaled into the lungs where it causes damage. Particulate matter is also known to carry chemicals that can exacerbate asthma and emphysema. Some negative health effects from the exposure to diesel exhaust are immediate, whereas others take being exposed for numerous years to show. Sulfur dioxide can cause respiratory distress. Aldehydes cause eye, nose and throat irritation. Causes of cancer in laboratory studies come from formaldehyde and hydrocarbons in diesel exhaust and may cause cancer when humans are exposed to it after several years. In workers exposed to diesel exhaust over ten to twenty years Lung cancer has developed. Lung cancer has also been found in laboratory studies of the exposure to diesel exhaust over a lifetime. Other chemicals determined to be known carcinogenic chemicals like benzo[a]pyrene are also present in diesel exhaust gasses.

Particulates are also known to soil and discolor building surfaces they come in contact with as they leave their soot deposits behind.

With most construction equipment being powered by diesel engines, more construction equipment is retrofitted with diesel emissions control devices every day. Although, the retrofitting installation can be quite involved it is only in its infancy at this time. All newly manufactured non-road or construction diesel equipment built after 2011 must be designed with diesel emissions control devices as standard equipment. The law that will govern the diesel equipment manufacturing industry requiring all diesel equipment to have diesel emissions control devices as standard equipment is building a huge new market place for the economy.

Numerous after-market manufacturers offer a variety of particulate filters with various coatings and design requirements, depending on the specific application and duty cycle. These particulate filters may be retrofitted on diesel equipment ad are a very effective way of limiting particulate matter from diesel engines.

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Emissions control is the attempt to control, limit, reduce or even completely remove the pollutants that we, as humans release into the earths atmosphere from the burning of fossil fuels such as gasoline. If you do not wish to destroy the earth with pollutants from your personal car then you will want to read the following because the pollutants that we introduce into the earths atmosphere can and will destroy the earth over a period in time.

The burning of gasoline to power the engine that drives your car down the road releases multiple pollutants, also known as emissions into the earths atmosphere. When we speak about emissions control, we are normally referring to the gasses emitted from various systems on your personal automobile.

For example, one type of emissions control is the control of the amount of exhaust gasses that we allow our car to emit into the atmosphere. The emissions control systems that we use to control the exhaust gasses released by our cars are the catalytic converter, EGR (Exhaust Gas Return) valve and the muffler. First in line is the EGR valve, which recycles exhaust gasses with a high fuel content back through the engines intake system to be burned. Next, the catalytic converter is used to catalyze the hydrocarbons and carbon monoxide in the exhaust released by the engine through the exhaust system. Platinum and palladium in honeycomb or pellet form is used to catalyze these gases as they pass through the catalytic converter. These gasses are catalyzed by the catalytic converter into carbon dioxide and H2O (water). Last, but definitely not least is your cars muffler. Although, the muffler is as by name used to quiet the noise pollution from your car, it is also the last chance for as much of the gasses not catalyzed into carbon monoxide and H2O in the catalytic converter to be removed or condensed.

Other emissions control systems on your car include the PCV (Positive Crankcase Ventilation) valve, evaporative emissions control and air injection systems. The PCV valve recycles the combustible vapors emitted from the crankcase through the intake system. The evaporative emissions control system recycles the combustible vapors emitted from the fuel in the fuel tank through the intake system. The air injection system is used to add oxygen from the atmosphere into the exhaust system to help your car to burn the emissions gasses created by your cars engine. To summarize these emissions control systems all help in their own way to control the pollutant gasses released by your car.

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The emissions control canister contains charcoal and is designed to prevent the gasoline vapors emitted by the gasoline in the fuel tank of automobiles from entering the atmosphere. The emissions control canister is mounted in a non-conspicuous, safe place, usually in one of the rear wheel wells. When the cars engine is not running the gasses radiating from the gasoline in the fuel tank are stored in the emissions control canister. The vapors are stored within this charcoal filled canister to be purged and burned when the running engine has reached certain predefined conditions. The emissions control canister in some automobiles will store any liquid fuel that has entered the canister in a reservoir designed into the bottom of the canister. The liquid fuel is stored in a separate reservoir to protect the integrity of the charcoal contained in the main emissions control canister housing.
There are three control methods used to purge the vapors from the emissions control canister, the first of which is controlled by the throttles position without a valve on the canister. A throttle body system may have a vacuum connecting the canister to a ported vacuum source designed as part of the throttle body. At any level higher than idle, the throttle may be positioned in will fresh air will be pushed into the emissions control canister. When the fresh air is added to the canister, it causes the fuel vapors to be purged into the throttle body through the port at a constant rate.
The second control method is by a vacuum valve that modulates the flow, also by throttle position. A diaphragm valve on the top of the canister opens when the vacuum ported from the throttle body opens it. When this valve is opened oxygen and fuel vapors are drawn into the intake manifold normally through the same port used to control the PCV system. The valve cycle under this control cycle is considered to be slaved to the throttle. The more you open the throttle the more the emissions control canister is purged.
The last of the three control methods is when the ECM activates a solenoid valve on the emissions control canister. This control method may be used only when the following pre-determined conditions are reached: The engine is within normal operating temperature, the engine has been running for a pre-determined amount of time, the vehicle speed has exceeded a predetermined rate and the throttle is open more than a predetermined level. As the solenoid is activated, full vacuum is applied from the manifold to the diaphragm of the purge valve, opening it completely. When the diaphragm fully opens the valve, fresh air rushes into the canister at a high rate, quickly purging the fuel vapors. When this happens, the ECM solenoid valve on the emissions control canister purges the canister.

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An emissions control device is used to control the amount of air pollution emissions from being released in the atmosphere. We encounter different sources of air pollution emissions in our daily lives. Some of the major sources are stationary sources, which may include steel mills, power plants, cement plants, smelters, refineries and other various industrial processes. These stationary sources of air pollution emissions release pollution and contaminants in the air such as aerosols, particulates gases and vapors.

With a good emissions control device, the emissions are controlled to a high level of efficiency. In many situations, such as factories, the pollution can be significantly reduced by means of different combustion controls and process modifications. However, most of the time some sort of add-on emissions control device needs to be attached to the ductwork and lead to the smoke stack in order to meet the minimum emissions limits allowable.

Some of the most common methods of reducing or eliminating gaseous forms of pollution are destroying pollutants by catalytic combustion such as a catalytic combustion reactor or flare stack; converting pollutants to a less harmful from by chemical reduction or using an air pollution system to collect pollutants. The most common emissions control devices used are electrostatic filters, catalytic reactors, carbon absorbers, thermal oxidizers, biofilters, wet scrubbers, fabric filters, or cyclones. In severe cases of pollution, more than one type of emissions control device may be used at one time.

Another source of air pollution emissions that we see every day is the automobile. The automobile creates forms of carbon monoxide, hydrocarbons and oxides of nitrogen during the combustion process, emits it out of the tail pipe and into the atmosphere. The crankcase of the automobile emits hydrocarbons as well as the vaporization of gasoline. In 1977, the Clean Air Act set limits as to how many of these pollutants the automobile could emit. As a result of the Clean Air Act, automobile makers created the self-adjusting engine and pollution or emissions control devices.

These new engines has a component called an oxygen sensor, which would measure the amount of fuel in the exhaust system, send a signal to the microprocessor where it would be analyzed and adjusted to the proper ratio of air/fuel. Automobiles are made with a variety of emissions control devices including catalytic converter, EGR valve, PCV valve, air pump and charcoal canister. Each of these devices plays a different role in controlling pollution from escaping in the atmosphere. Although the automobile can be driven without some of these devices, the law states that each vehicle driven on the highway must have the proper emissions control device.

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In the 1998 Dodge Ram model (BR/BE) the emissions control for Rams trucks built through July 15, 1998 build code MDH 0715XX that have the 5.9L Cummins 24 valve diesel engine have been placed on recall. If your 1998 Dodge Ram has a 6 in the eighth position of the VIN and is equipped with federal emissions control system with a NAA sales code, your recall number is 8001. If it is equipped with the California emissions control system with a NAE sales code, your recall number is 8002.

These engines and ECM (Electronic Control Module) on the emissions control for rams trucks may emit oxides of nitrogen (NOx) greater than the maximum allowed levels as pre-defined to protect public health and pollution levels. The unburned combustible emissions can cause ozone and smog to be formed in the atmosphere.

This recall on the emissions control for Rams trucks must be performed prior to registration in California. In California the dealer servicing this recall on your vehicle must provide a proof of correction form number 81-016-1053 after the recall services have been performed for recall number 8002 if you wish to renew your vehicle registration.

To correct this default in the emissions control for Rams trucks, the ECM software must be updated by being reflashed. When this recall service is performed any other software update between the date of manufacturer and the recall service date will be added to the ECM.

The Mopar diagnostic system running release 21 or newer with TIL CD release 1169 or newer must be installed. The 1693/1694 trouble codes can cause the check engine light to illuminate during the ECM reflash process. The computer must have a diagnostic run to check for these codes before the vehicle is returned to the customer.
After updating the ECM there must be an Authorized Modification Label printed and adhered to the ECM and covered with clear tape.
Some of the vehicle under these recalls on the emissions control for Rams trucks may still be in dealer inventory around the country and Federal law requires the dealer to complete the recall service on the inventory vehicles before delivery to the customer. Even used vehicles in any dealers inventory that are included in this recall must be serviced before delivery to the customer.
In addition to the 8001 and 8002 recall many of these vehicles also require the 788 and 799 recall service.
These are important and crucial recalls to the emissions control for Rams trucks to protect the environment and health of the public. If these recall services are not performed, you may be breaking any number of local, state and Federal laws and regulations. These laws and regulations have been passed to protect public health and to aid in the reduction of pollution and global warming.

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Each part of your automobile is controlled by a different part, yet they all work together to keep the vehicle operating efficiently. The automobile technology has made much advancement through the years. These advancements have improved the efficiency of the automobile while at the same time being less harmful to our environment. Years ago, when the automobile was first invented, it was such a step forward for the world that problems that it caused to our environment were not taken into consideration. Today, with the constant struggle to clean the atmosphere of harmful vapor and gases, vehicles and large machinery are being made with preventative measures, such as the emissions control gas vent valve.

Emissions control gas vent valve is just as the name states. It’s a valve that helps control the emissions of gas from escaping into the atmosphere. Whereas years ago you could drive behind a vehicle and see the fumes and gases coming out the tailpipe, vehicles are made with preventative parts such as the emissions control gas vent valve. The emissions gases are contained in the vapor canister and the emissions control gas vent valve is the valve on the vapor canister, which allows the pollution gases to be vented. Vapor canister may also be called emission gases canister. Emissions control gas vent valve is one of the parts that have been developed by the Evaporative Emission Control System.

Evaporative Emission Control System (EECS) was started to help stop gases and vapors from escaping from our fuel tanks and going into the atmosphere. Automobiles have fuel tank vapors in them at all times, even when the car is not running. However, if the car isn’t running, they’re not getting into our atmosphere polluting the environment. Thanks to the EECS, these vapors are stored in a charcoal canister, which is located in the left rear wheel well. The canister stores these gasoline vapors from the gas tank until they can be purged and safely burned by the engine. In some methods of purging, this process is taken care of by the emissions control gas vent valve.

The purge cycle of the charcoal canister can be operated by a throttle position or by the use of the emissions control gas vent valve. If the basic throttle position is used, the canister and a ported vacuum source are connected by a vacuum line. The minute the throttle is in an above idle position, the vapors are moved to the throttle body and fresh air is sucked into the canister bottom. The emissions control gas vent valve is kept in a throttle position by help from the vacuum valve. The vacuum in the throttle body opens the diaphragm valve and allows vapors and air to be sucked into the intake manifold. The more the throttle can be opened, the more air that can be purged. The charcoal canister valve can also have a purge cycle that’s controlled by the solenoid valve stored on the canister. This provides a quick exchange of vapors for fresh air.

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The emissions control canister will release the stored fuel vapors from within it when the emissions control pressure high is reached. At the pre-determined emissions control pressure high one of three control methods become activated for the emissions control canister to purge the vapors from itself. The three control methods to purge the emissions control canister that may be used to purge the emissions control canister when the emissions control pressure high is reached are:
1. The position of the throttle on a throttle body system will determine when the emissions control canister is purged after the emissions control pressure high is reached. A throttle body system may have a vacuum connecting the canister to a ported vacuum source designed as part of the throttle body. At any level higher than idle, that the throttle may be positioned in fresh air will be pushed into the emissions control canister. When the fresh air is added to the canister, it causes the fuel vapors to be purged into the throttle body through the port at a constant rate.
2. The second control method used when the emissions control pressure high is reached is by a vacuum valve that modulates the flow, also by throttle position. A diaphragm valve on the top of the canister is opened by the vacuum from the throttle body. When this valve is opened oxygen and fuel vapors are drawn into the intake manifold normally through the same port used to control the PCV system. The valve cycle under this control cycle is considered to be slaved to the throttle. The more you open the throttle the more the emissions control canister is purged.
3. The last of the three control methods to purge the canister when the emissions control pressure high is reached is when the ECM activates a solenoid valve on the emissions control canister. This control method may be used only when the following pre-determined conditions are reached: The engine is within its pre-determined normal operating temperature, the engine has been running for a pre-determined amount of time, the vehicle speed has exceeded a pre-determined rate and the throttle is open more than a pre-determined level. As the solenoid is activated, full vacuum is applied from the manifold to the diaphragm of the purge valve, opening it completely. When the diaphragm fully opens the valve, fresh air rushes into the canister at a high rate, quickly purging the fuel vapors. When this happens, the ECM solenoid valve on the emissions control canister purges the canister.

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There are numerous emissions control sites on the World Wide Web. On these emissions control sites you will find information on the different emissions control systems designed for automobiles. You may also find information on industrial emissions control applications on the emissions control sites on the Internet.
If you are in search of information related to the emissions control device or devices for automobiles then you will want to search for emissions control sites on the Internet. Whether the automobile application you need information for is on an import or domestic vehicle, there are emissions control sites on the Internet with information about the emissions control device on every automobile.

Some automobiles use emissions control systems that are controlled by the position of the throttle on a throttle body equipped vehicle. The emissions control systems on other cars are slaved to the throttle by a valve installed on the canister that is open and closed by vacuum pressure supplied by the throttle body assembly. Another system designed to run the emissions control devices on cars are an ECM activated solenoid valve on the emissions control canister.
No matter which type of emissions control device you wish to gather information on, you will find emissions control sites on the Internet to help you in your search for knowledge. Emissions control sites on the Internet are designed to be helpful for the novice and expert, consumer and professional. It does not make a difference if you are a weekend warrior consumer whom desires to repair the emissions control system on your earlier model import or if you are an automotive repair professional repairing the emissions control system of a customer. On the Internet, you will find emissions control sites designed to assist you with the specific repair needed on your specific automobile.

Some of the emissions control sites found on the World Wide Web have been designed and written by automotive professionals, whereas others have been designed and written by consumers or as they are often referred to as, weekend warriors. Sometimes weekend warriors know as much and occasionally more than an automotive professional about the application that you are in search of information on. Other times with extremely proprietary applications, only an educated, trained and experienced automotive professional will be able to supply the information needed to aid in the repair of the emissions control system on your car.

In summary, there are emissions control sites on the Internet with information about the emissions control system on every make and model of vehicle that have been designed to be helpful to both the consumer and professional. These emissions control sites have been designed and written by both novice consumers and automotive professionals from around the globe. If information on an emissions control device for an automotive application is what you are looking for, look no further than any of the numerous emissions control sites on the World Wide Web!

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