Tag Archive | "EGTS"

MAINTAINING EMISSION STANDARDS

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MAINTAINING EMISSION STANDARDS


Launch DPF Gun

With CO2 emissions on the rise, how are suppliers preparing workshops accordingly?

unless you have your head in the sand, you’ll notice that the tide has turned for emissions and for light diesels in particular. Last month, almost anything registered before 2005 was effectively banned from central London, thanks to the so-called Toxicity Charge. What’s more, these standards are only likely to get tougher, with a diesel emissions check at MOT among many options being mooted by those in power. This isn’t necessarily a bad thing: Everyone wants fresh air and there are a number of products to help clean up diesel engines.

One technology that has kept VMs in line with their objective is Exhaust Gas Temperature Sensors (EGTS), designed to protect components exposed to hot exhaust gases from overheating. Julian Goulding, UK Marketing Manager at Delphi elaborates, “Exhaust gas temperature sensors play a crucial part in modern vehicles. From Euro 5b, all diesel vehicles had to have EGTS, with each car having up to six sensors, they’ll become an increasingly important service item.” He adds that these parts can and do fail, which is hardly surprising given the hellish temperatures that they endure. However, an EGTS problem is often misdiagnosed.

TRAINING AND WEB PLATFORMS
To counter this, Goulding suggests workshops can enrol onto a number of training courses in order to repair these systems confidently. Based at its Warwick Centre, the parts maker hosts various programmes, with training that can also be accessed via its’ digital channels; which provides information on fitting sensors and diagnosing faults successfully. Helen Goldingay, UK Marketing and Communications Manager at Hella, concurs, stating that although most garages are up-to-speed with EGTS, attention on newer technology must be brought to the forefront. She expands, “Due to the growth in use of the micro hybrid (start-stop) systems, intelligent battery sensors, which play a crucial in the battery management function that are part and parcel of the system, are clearly a growth area, as are those directly connected with emission controls, like exhaust gas pressure and air quality sensors.

‘Technicians are aware of the growth in the number of sensors that modern vehicles require, but what is more important than actually knowing every sensor itself, is the ability to identify where a fault lies and have the equipment to reinstate the management system once the component has been changed.” To facilitate this, various web platforms have been launched by the company in recent years. This includes Tech World for technicians as well as Partner World for factors and others in the supply chain.

CLEANING AND TESTING

It’s all well and good being able to diagnose faults with these parts, however, carbon build-up on EGR valves, DPF’s and injectors can restrict sensors from detecting problems within the fuel and exhaust system. Carbon build- up or post combustion carbon as it’s otherwise known, is a result of vehicles running in conditions where they can’t reach their full temperature; resulting in heavy quantities of carbon being burnt.

Fortunately, the aftermarket isn’t starved of chemical products to help with this. Various potions that are poured in the fuel or in the crankcase, as well as several machines have come onto the market in recent years. One of the most recent entrants in this sector comes from diagnostic equipment supplier Launch UK. The company has recently launched a device called a DPF Gun as well as various pour-in chemical cleaning products. Richard Collyer, Product and Equipment Specialist at the firm, expands, “Once vehicles are full of carbon, the EGR valve can’t operate properly and can blow electronically. Once this occurs, it will need changing.”

Euro5 BM

FACING FEARS
Akin to this, Mark Blinston Commercial Director at UK manufacturer BM Catalysts, encourages independents to get involved in servicing DPFs themselves, instead of dismantling and sending them off to dealers, which he says can be a ‘costly move’ for the garage. However, there is still a ‘fear’ around this technology that he brings to light, “The general perception is that garages are worried that if they get it wrong, it will be expensive”, he continued, “There’s been a lot of noise about this in the news where the BBC recently done a report revealing a shocking number of vehicles being driven on roads that are not fitted with them. This is one reason why some garages aren’t getting involved.”

To face this fear head on, Blinston explains that the firm has produced some point- of-sale material, training sessions and technical information for technicians. This also goes along with a number of new offerings for its’ core lines of catalytic converters, pressure pipes and DPFs. He concluded, “We have invested in many resources and developments over the last year by adding 245 new part numbers in 2017 covering 30 million vehicles across Europe.”

Posted in CAT Features, Exhausts, Factor & Supplier News, Garage News, News, Retailer NewsComments (0)

TIGHTENING UP EMISSIONS

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TIGHTENING UP EMISSIONS


Do you know your Lambda from your EGTS? Here’s a factor’s guide to what those small box parts actually do.

With the existing laws set by the Euro 6 legislation, the pressure for vehicle manufacturers to invest more resources into developing better vehicles that complied with the legislative guidelines are continuously scrutinised. Emission pollutants such as nitrogen oxide (NOx), carbon monoxide (CO), total and non- methane hydrocarbons, as well as various particulate matters were expected to be reduced with the use of modern automotive technology.

Effective reduction of pollutants goes beyond ensuring that emissions control systems such as CATs and DPFs are up to scratch. Vehicle electronics and engine management systems are integral in optimising a vehicle’s efficiency and in turn, lowering its carbon footprint. With a wide array of products that support the lowering of harmful emissions, we thought it would be worth sharing some points about the significance of the various sensors that you deliver to garages everyday.

LAMBDA SENSORS
By the simplest definition, lambda sensors monitor the air- to-fuel ratio within the exhaust and relays the information to the ECU. Lambda sensors are vital to ensuring a vehicle’s optimal performance and aid to reduce harmful carbon emissions.

The perfect air-to-fuel ratio for optimum engine efficiency is known as the stoichiometric ratio. The stoichiometric ratio for a petrol engine is 14.7:1 in which 14.7 grams of air is needed for every 1 gram of fuel. This ratio allows for optimum fuel efficiency, wasting less fuel and in turn, producing the least amount of emissions.

Traditionally, lambda sensors produce a voltage signal based on the volume of air detected in the exhaust. If the mixture is too rich (too much fuel supplied), the sensor produces a voltage of around 0.9 volts. When the mixture is too lean (insufficient fuel supplied), it produces around 0.1 volts. A perfect stoichiometric ratio produces 0.45 volts. To compensate for imperfect mixture ratios, the ECU adjusts the fuel mixture by adding more fuel when the mixture is lean, or using less fuel when it is too rich.

Whilst traditional lambda sensors do the job of regulating the stoichiometric ratio, it was unable to provide the ECU with an accurate reading of how rich or lean the air-to-fuel ratio was. Lambda sensor technology needed to keep up with the demand of the tighter euro emission standards.

With the introduction of the 5-wire lambda sensor, the ECU is not only supplied with a signal that relays if the air-to-fuel ratio is running too rich or too lean, it also conveys by how much. This precise information is swiftly sent to the ECU to allow the vehicle to rectify the air-to-fuel ratio more efficiently and effectively and increate the overall performance of the vehicle.

EGTS

In comparison to lambda sensors, exhaust gas temperature sensors are relatively new. An EGTS measures the temperature of the exhaust gas that is monitored by the ECU to help prevent long-term damage to components. The EGTS protects a vehicle’s exhaust system from overheating, which is especially important when a diesel particulate filter regenerates. The DPF reduces the amount of soot that is released with exhaust fumes by collecting and storing it within the filter. Over time, soot accumulates within the filter and needs to be incinerated at extremely high temperatures
in order to remove from the exhaust system and release it in the surrounding air, safely.

Cambiare sensor thumb

Typically, exhausts run at temperatures in excess of 900C in order to successfully regenerate the DPF. At these extreme temperatures, thermal overload becomes a huge risk. The EGTS monitors the heat produced from the exhaust, supplying the ECU with a signal to ensure that the temperatures reached do not fall outside a vehicle’s safety parameters.

Due to the extreme conditions that EGTS operates in, they are prone to damage during exhaust component replacements. Therefore, they need to be replaced simultaneously with a DPF and/or exhaust, as opposed to waiting for the dashboard warning light to illuminate.

Timely replacement of an EGTS prevents damage to the DPF and subsequent engine damage. Our firm’s EGTS use two types of technology – positive temperature coefficient and negative temperature coefficient. PTC increases the resistance with the increase in temperature. NTC, works in an opposite fashion with the sensor producing Temp sensor less resistance as the temperature of the exhaust increases.

EGPS
EGPS are differential sensors that measure the pressure of gas between the intake and outtake the diesel particulate filter (DPF). By measuring the pressure, the EGPS communicates a voltage signal to the ECU. This enables the system to detect the level of soot and particles collected within the DPF. This information enables the ECU to monitor and detect when regeneration is required for efficient emissions reduction.

As a result, a malfunctioning sensor can cause a variety of problems which impacts the increase of oil consumption and emissions. If the sensor is faulty, DPF regeneration can increase unnecessarily leading to the shortening of the DPF lifespan.

Cambiare covers a range of applications within its portfolio of lambda sensors and EGTS. Stocking more than 100 EGTS and 500 lambda sensors, they are available from FPS via same/next-day delivery.

Posted in CAT Features, Factor & Supplier News, Garage News, News, SensorsComments (0)

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