EL MÓDULO PRECALENTADOR DE BUJÍAS

El motor diesel se construyó en dos versiones: de inyección directa y de inyección indirecta. La inyección indirecta tiene los inyectores en una precámara junto con una bujía de calentamiento; la directa, no tiene precámara, el inyector asoma directamente fuera de la tapa de cilindros, hacia la cámara de combustión pero apenas los orificios de inyección y puede contar con bujías de calefacción o no.

La función de estas bujías de precalentamiento es precalentar el gasoil para que reduzca su viscosidad y pueda encender fácilmente el motor una vez que se ha dado marcha. El aire entra en forma directa o a través del turbo y el gasoil está precalentado por las bujías y de esa forma es más fácil encenderlo debido a la presión y la temperatura que se crean en el tiempo de compresión del cilindro.

El funcionamiento de estas bujías se produce por una corriente que circula por un resistor de alambre dentro de las mismas, lo que pone la punta de las mismas al rojo. En los primeros motores, el conductor debía accionar una llave que enviaba corriente a las bujías durante un tiempo estimado suficiente como para que el motor arrancara.

Más tarde, esto se automatizó y al poner en contacto la llave, se producía el encendido de las bujías antes del arranque del motor; esto se hacía porque se había colocado un módulo precalentador que durante un tiempo (algunos segundos) alimentaba a las bujías y luego se interrumpía la corriente que llegaba desde la batería.

Hoy, en los motores electrónicos, sigue estando presente dicho módulo pero se halla conectado a la central EDC que lo acciona durante el momento de poner la llave en contacto, de forma de alimentar las bujías. Hay un conector que a través de un cable grueso trae la corriente desde la batería, y otro conector que se comunica con la EDC mediante un ramal de cables.

Hay además un tercer conector que contiene dos palas, cada una de ellas conectada a dos bujías (en un motor de 4 cilindros), o sea que hay dos bujías en paralelo alimentadas por cada palita. La unidad de precalentamiento en este caso pasa a ser una centralita que contiene circuitos integrados que regulan el tiempo de encendido de las bujías.

Además, el módulo provee autodiagnóstico, es decir que cuando una de las bujías se quema y deja de funcionar, el integrado sabe diferenciar que la corriente tomada por esa palita es la mitad de lo que era antes cuando ambas bujías funcionaban y se lo comunica a la EDC de forma que ésta haga encender el rulo en la lámpara testigo del tablero, en forma intermitente.

En ocasiones, durante la marcha, este indicador “rulito” amarillo se enciende y luego de algún breve tiempo, se apaga. El conductor que no conoce su funcionamiento se preocupa pensando que algo funciona mal y consulta al mecánico. En realidad, en este caso, la EDC al constatar que la temperatura del motor es baja, y contando con las RPM del motor y la velocidad del vehículo, calcula que hay mala combustión debido a que el motor está frío y envía la orden al módulo precalentador para que éste ponga en funcionamiento las bujías a fin de mejorar la combustión, y luego, las apaga.

Las bujías de precalentamiento, ahora pasan a ser también de post-calentamiento, durante la marcha normal del motor, procedimiento muy normal y que no debe alertar. Es de destacar, de paso, que si una bujía se quema, antes de retirarla es conveniente echar una ligera cantidad de aerosol aflojador de tornillos de forma que penetre en la rosca y sea más fácil retirarla luego.

Cada tipo de bujía tiene una tuerca sobre la que debe ejercerse solamente el torque indicado para esa bujía, al apretarla, pero también para sacarla; es decir, se coloca el torquímetro con la llave tubo correspondiente y se intenta girar para retirarla. Si no afloja con ese torque máximo no hay que forzarla porque se va a romper y la única forma de retirarla luego es abriendo el motor y llevando la tapa a la rectificadora.

Entonces, si con ese torque no afloja, se debe dejar con otro poco de líquido hasta que sea sencillo retirarla sin dañarla; se prueba cada tanto hasta que se pueda retirar. En los motores electrónicos, de 4 válvulas por cilindro, hay muy poco espacio para la bujía y ésta suele ser muy delgada y además, costosa. Una vez retirada, conviene repasar la rosca con el macho adecuado cuyas ranuras deben estar llenas de grasa a fin de que las esquirlas o el óxido queden retenidos en el macho y al sacarlo, salgan con él en lugar de caer dentro del cilindro. Debemos tener mucha precaución con eso.

El módulo de precalentamiento es muy sencillo de probar si funciona. En primera instancia, dado que se trata de un módulo electrónico, una verificación con el scanner indicará que falla y a la vez, el rulito estará parpadeando. Si el scanner no muestra falla pero las bujías no presentan 12V en sus terminales, deberemos verificarlo con el tester, colocado en 20V de continua. En el terminal de batería deben haber 12 V conectados y al poner en contacto la llave, en las palitas, en cada una con respecto a masa, debe haber salida de 12V para las bujías. Si no saliera, puede no ser el módulo, sino que ahora deberíamos desconectarlo de la EDC, sin poner en contacto y medir en los 9 terminales de la ficha que llega desde la EDC para ver cual tiene tensión o si no hay tensión en ninguno y anotar esos valores. Puede ser un falso contacto de la ficha o puede ser un cable cortado; hay que verificar esto antes de cambiar el módulo.

Luego pondremos contacto y rápidamente, antes que se interrumpa la señal de la EDC, verificar si en alguno de los pines (desde la EDC) hay distinta tensión, lo que indicará que la EDC envía señal y es el módulo el que no funciona. Si no logramos hacerlo, cerramos contacto y volvemos a dar para medir el resto de los contactos de la ficha del ramal que viene de la EDC. Si hay señal desde la EDC, entonces deberemos reemplazar el módulo.

Si llegara a quedar registrado en la memoria de la EDC que le desenchufamos el módulo, deberá borrarse la falla con el scanner, en cuyo caso se apagará el testigo del rulito.

Para verificar las bujías, con llave de contacto apagada y con el tester en posición de 200 Ohms, entre el terminal de alimentación (desconectado) y chassis debe medir unos 4 o 5 Ohms si es que está buena; el valor exacto lo encontraremos al medir en todas, ya que en todas debe haber el mismo valor de resistencia.

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12 comentarios sobre «EL MÓDULO PRECALENTADOR DE BUJÍAS»

  1. Your brain recognises the surplus testosterone in your
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    signal to make extra testosterone. In situations when a hormonal imbalance has impacted a person’s dimension,
    testosterone therapy could also be helpful. A manual workout called jelqing includes rubbing the penis
    to enhance blood flow and maybe lengthen the tissue. Nevertheless, there isn’t any conclusive scientific proof that this system
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    or long-lasting. Furthermore, utilizing steroids can raise prolactin levels,
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    Penile shrinkage is a potential facet effect of testosterone use
    in some people. Testosterone, a naturally occurring hormone within the
    physique, performs a vital function in the growth and upkeep of sexual traits in males.
    It is often prescribed for individuals with low testosterone ranges or those looking for to reinforce muscle mass and performance.

    However, for some users, using exogenous testosterone may result in penile shrinkage.

    They are unaware, however, that it negatively affects their hormonal and reproductive health.
    Nevertheless, maintaining a weight coaching regimen and focusing on building lean muscle remains the greatest way to maintain testosterone
    levels high in both the short time period and long run.
    But if a loss of blood circulate is coupled with a big decline in testosterone, the results could be fairly
    dire. This isn’t just because it helps maintain our libido, however because imbalances in testosterone can immediately lead to erectile dysfunction.
    After a number of years at GSTT, he moved to the world of private healthcare at a cancer clinic on Harley
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    whereas working at a GP apply in North London. Mo now leads the group of prescribers
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    most secure and most convenient care to our patients.
    Your body is a finely-tuned machine, and one slight imbalance can easily lead to one other.
    This is what can occur in case you have a testosterone deficiency.
    The Journal of Urology states that exogenous testosterone
    causes a variety of results on spermatogenesis in men.
    Male hormones and sexual well being may be adversely affected by steroid use.
    Post-cycle therapy is recommended to correct the pure hormonal balance.
    But at the finish of the steroid cycle, the hormone helps to provide it normally.
    Importantly, if normal ranges of hormones are appropriate in comparability with steroids,
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    Nervousness and low vanity may finish up from
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    Several of these supplements have been shown in trials to enhance muscle development and density by appearing similarly to testosterone.
    Corticosteroids are sometimes contained within the hormone cortisol, which can increase men’s stress levels and have an impact on the function and
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    Several scientific research have been carried out to analyze the
    potential effects of TRT on penile dimension. One study printed within the Worldwide Journal of Impotence Research found that TRT had no important impact on penile size or girth in a gaggle of men with low testosterone levels.
    Another research revealed in Urology discovered similar outcomes,
    with no vital adjustments in penile measurement after six
    months of TRT. Some individuals might have
    naturally higher testosterone ranges, which might lead to extra
    important penile growth during puberty.
    Anabolic steroids are artificial chemicals that work just like the male hormone testosterone.
    This article will present you with a good idea of how steroids have an result on your sexual well being and performance by looking at each the facts and the myths.

    The Leydig cells are answerable for the shrinkage of the testes when anabolic steroids are used.
    There are psychological penalties of estrogen as properly.
    Excessive estrogen ranges could cause mood swings, irritability, and feelings of worry or despair in sure males.

    The use of anabolic Steroids For Muscles (Metis.Lti.Cs.Cmu.Edu) could make these temper swings worse.

    They may feel worse about their measurement, appears, and manhood.
    Steroid use can also trigger adjustments in hormones that can have an effect on libido,
    which may decrease shallowness and bodily confidence even more.

    When you take steroids has a big effect on how they work and how massive your penis is.

    Androgen deprivation causes the loss of most of the elastic fibers;
    that are replaced by collagenous fibers (R).

    Testosterone substitute remedy (TRT) may help to restore the loss of easy muscle tissue in the cavernosal tissue and restore erection (R).
    Micropenis is treated with testosterone injections, topical DHT
    (R) and even oxandrolone (Anavar).

  2. TUDCA (tauroursodeoxycholic acid) is a complement with potent liver rejuvenating properties, in accordance
    with varied clinical trials (4, 5). Consequently, a lot of our sufferers take TUDCA to reduce their
    risk of developing peliosis hepatis. This is because oral steroids pass through the liver upon entry and exit, whereas injectable steroids only stress the liver upon the latter.

    What is inconsistent with medicine and the regulation is that certain steroids are FDA-approved in medication (3), while different steroids usually are not.

    As one can think about, the milder compounds with fewer unwanted side effects are FDA-approved and prescribed,
    whereas the more toxic steroids aren’t. Anabolic steroids, nonetheless, have been as
    soon as 100% legal to obtain, even in international locations where they’re now outlawed and banned by the FDA.

    Their impact varies amongst people and is influenced by genetics,
    workout depth, and total health. Understanding these limitations is essential
    for athletes to avoid overreliance on supplements and to take care of a balanced strategy to their coaching
    and well being. One Other authorized steroid, Anadrole, is
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    In addition to proteins, a well-rounded food regimen must also
    emphasize complicated carbohydrates and healthy fats.
    For instance, complete grains, fruits, and greens present essential nutrients and vitality,
    while nuts, seeds, and avocados ship healthy fats needed for hormone synthesis.
    Testosterone also plays a major role in regulating libido and sexual well being.

    Patients receiving steroid therapy are monitored intently to ensure correct dosage and to attenuate the
    chance of side effects. Steroids can only be
    prescribed for reliable medical conditions, and a prescription is required
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    (T3). Protein is a cornerstone of any efficient health routine, particularly when your aim is to build lean muscle.

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    Superdrol is an applicable name for this steroid concerning strength positive aspects.
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    chance of injury). Dianabol remains to be believed to be
    the staple bulking steroid in skilled bodybuilder stacks today,
    5 many years later.
    This mixed effect contributes to a more efficient fat-burning system throughout the physique.
    One of the first ways these legal testosterone steroids
    help in fats burning is by rising the metabolic fee.

    This implies that the body’s pure processes for breaking down and changing stored fat into usable energy
    turn out to be extra efficient.
    By the second week, I saw a real spike in my power levels, with a 10 lbs.
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    This is already a difficulty in American society, with 375,
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    In the United Kingdom, the law relating to the use and possession of those substances is clear.

    It is made with natural elements which were carefully selected for their capability to assist you shed extra fats and
    obtain a leaner, more toned physique. Thanks to them, anybody can achieve glorious outcomes with
    out harming their well being. Anadrol is considered as the twin sibling of
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    muscle hypertrophy and power ranges. Anadrol is
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    it produces slightly enhanced weight accumulation compared dangers of steroid Use (https://git.rikkei.edu.vn/terrabroinowsk/terra2010/-/issues/2) Dianabol.
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    away from needles.

  3. Naturally, your food regimen should help fat
    loss, which can always be the case on a slicing cycle.
    Oxandrolone was no doubt decided to be a mild anabolic steroid way back then, which made it
    potential to be tolerated by feminine and child patients10.

    Oxymetholone is probably considered one of
    the most hepatotoxic steroids in existence, thus significantly reducing the
    amount of time you presumably can cycle this drug.
    Newbies should not run an Anadrol cycle any longer than four weeks;
    more-experienced customers may go 5-6 weeks.

    Thus, almost the entire weight gained on Superdrol shall be stored post-cycle,
    as it doesn’t cause increases in extracellular water
    retention. Anabolic steroids could be addictive for some users due to greater levels
    of endorphins and enhanced physique composition during a cycle.
    Post-cycle bodybuilders can experience a degree of muscle atrophy and decreased neurotransmitter levels, which can trigger dependence in some bodybuilders.
    However, such reductions are delicate in distinction to other anabolic steroids.

    In phrases of its advantages and antagonistic results, we discover Winstrol
    to be slightly more potent than Anavar. Thus, on Winstrol, we observe users building somewhat extra muscle whereas experiencing harsher side effects.

    Injectable steroids are usually less poisonous to the liver however require safe injection knowledge.
    At the identical time, they’ve longer-lasting effects than oral ones, which is important for cycle planning.
    Several steroids are additionally approved by the FDA, yet
    they remain illegal at present in most nations.

    Today, steroid use only turns into legal when prescribed by a medical physician for underlying well being problems (11).

    Instead, opt for reasonably intense train with frequent resting periods.
    Another research in 2017 concluded that 20 minutes of average exercise is adequate to supply an anti-inflammatory response.
    You also wants to be aware there is the potential for
    psychological unwanted aspect effects. Prednisone impacts areas of the mind that handle the
    regulation of different neurotransmitters, together with
    serotonin and dopamine — each of which can impression mood.
    If the steroid is stopped soon sufficient, these results
    ought to reverse and go away. However if Anavar continues to
    be used, it can be tougher to reverse or treat virilization results the extra they’re allowed to develop.

    If these antibodies are elevated, there’s a very robust
    chance your inflammatory signs will respond well to a gluten-free food regimen.
    Just about any MD can order the check for you, so ask your liked ones doctor for help on this.
    One does not need to have celiac illness to be gluten-intolerant and develop autoimmune illness in consequence.
    However, users ought to be careful about utilizing certain legal steroid manufacturers, as sure companies have been accused
    of adding unknown substances to their products, resulting
    in legal motion. ‘HGH gut’ is commonly noticed in IFBB bodybuilders, which may be attributed to the enlargement of internal
    organs such as the intestines and liver (9).

    Clenbuterol notably increases heart fee in our patients, which can additionally be supported by research (8).

    Legal steroids are compounds designed to imitate the effects of anabolic steroids however are safe to take and FDA-approved.
    We have found authorized steroids, or steroid alternate options,
    to be protected for girls and pose no risk of virilization unwanted side effects.
    This testosterone ester is a long-acting steroid with a half-life of 8-12 days.
    This means it’s slow-acting compared to another testosterone esters, and
    it may possibly take 4 or more weeks till you start seeing
    noticeable enhancements in power, generally as long as six weeks.
    With Out optimum testosterone ranges, we can’t construct muscle, shed fats, or
    maintain wholesome and regular functioning in each part of life.
    These will be biased towards unlucky guys
    who suffer from greater than common pimples and hair loss (who
    wants to go bald?).
    Anavar has a modification to its chemical
    construction, often identified as 17-a-alkylation modification, which allows us to make use of this steroid
    orally. But in comparison with injectable steroids, oral steroids will take longer to clear from the liver, and
    that’s the place the attainable danger lies for liver stress or liver injury.

    Winstrol is prone to cause virilization results
    in girls, together with voice hoarseness30, acne, adjustments in menstrual durations, and development of facial hair.
    Females would need to use very low doses Health Risks Of
    Anabolic Steroids [Celiacosmurcia.Org] Winstrol to avoid these effects, within the 4mg
    to 10mg daily range. Anavar at 10mg/day for 6-8 weeks is
    good, and you most likely won’t have any unwanted facet effects.
    As for the best time to take Oxandrolone, cut up
    it into two doses daily at 5mg/each (once with breakfast and
    once more earlier than bedtime).
    These cycles are solely sometimes utilized by seasoned steroid users who’ve developed a tolerance to poisonous steroids and try to drop their body fats quickly.
    The downside to this cycle is that it’s particularly cardiotoxic, with blood pressure rising considerably.

    Customers can incorporate regular cardiovascular train into their
    schedule to cut back cardiac pressure. We have found that four g/day of fish
    oil and a food regimen high in unsaturated fats or low in saturated fat are optimum for improved levels of cholesterol.
    However, such strategies usually are not guaranteed to
    normalize blood strain completely from this
    stack. We have found this to be the most efficacious oral cycle for getting ripped.

    In small doses for short quantities of time, when their use
    is monitored by a doctor, anabolic steroids have lower danger of long-term or harmful unwanted
    aspect effects. Biologic brokers, similar to Humira and Enbrel, play a major function within the
    treatment of autoimmune conditions. Given by intravenous infusion or subcutaneous
    injection, these medicine block the inflammatory mediator known as
    tumor necrosis issue (TNF).
    The construction of the testosterone hormone is strictly the identical in these two ester
    variants. Only the hooked up ester differs, controlling the discharge rate of the hormone.
    Each are very related, but Testosterone Cypionate has a slightly longer half-life of 1 further day.
    At the practical stage, users are unlikely to note a difference, and the selection often comes
    down to availability.

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