The speaker failure check

The car horn is not a frequently used device is sometimes necessary, but not wishful ringing or makes strange sound, very big sense of confusion.
The horn chirp big reasons for the poor are poor contact. Wherein, in particular the steering wheel around each contact, due to prolonged use, so that contact poor contact. Check the fault of the speaker, left and right to turn the steering wheel, if this case a larger the hissing friction sound, mostly contact surface is not smooth. To solve this problem, it can be removed to the upper cover of the steering column, injection grease to the contact portion. So most of them can reduce the hissing sound of friction, can also improve the response of the speaker.
For thorough maintenance of the speakers push switch contacts, it is necessary to remove the steering wheel itself to clear the dirt on the contacts, re-coated with a layer of grease, so that we can significantly improve the conductive contacts, which can be assured by move the car horn.
Check the speaker of the song, if you feel song not ringing, low and weak, are contacts of a bad contact.
Repeatedly pressing the switch, pressing the speaker if the speaker sometimes ringing, sometimes not ringing, mostly pressing the switch contacts within the contact is not good.
Left and right to turn the steering wheel, larger the hissing friction sound, injected some grease to the contact site.
If the speaker is completely sound, is likely to be a fuse is blown, check the fuse. Speaker power cord, to find the speaker's power cord, the wiring of the power cord plug disassembly, check whether there is poor contact.
If the horn chirp dull, very horn itself is faulty, then as long as the horns knocked most of them can be improved.

Highway lane driving -5 rules

The freeway run up happy chic, even the usually drive carefully ladies and the age of the vehicle is not too long "childish" drivers who have tasted recruit speed on the highway, "You" to 100 km / h or more. However, some every robbery by grinding, "many vicissitudes" old man "motorists they often taste have another choice: Ning to wear vegetable market, not take the" slaughterhouse "(highway). Up fine but wondering, there is some truth in this argument.In fact, "Zhiyizhibi, know yourself" discipline-honored, as long as a good understanding of the characteristics of highway driving, and then according to their actual ability to lane can be safely and quickly through the highway destination. 

1, the highway is generally much smaller than the city's downtown area density of vehicles, while the intersection, bend majority moderate, so the speed limit is higher. Many motorists in the high-speed set foot naturally and unconsciously speed mentioned that the upper limit of their ability to control the car, at which point any unforeseen circumstances will result in a dangerous situation or accident. So the most important thing is for highway traffic to control their emotions, maintain a safe speed, never exceeding the speed limit by speed limit signs. Of course, can not exceed their own ability to control the car to the pursuit of speed limits on the speed limit.  

Best to let the speed to 8O% lower than the capacity of their own control car.Highway speed, it seems everybody seems rapid staunch, but be sure to keep in mind the principle of the high-speed lane on the road should be: gentle, tender, and then gentle. High-speed traffic is the most taboo action blunt, hit the steering wheel when the steering to excessive over most of the rear wheels lose grip and cause loss of control of the vehicle. 

 Especially the current square unexpected, but can not scramble to play the direction should decelerate while as comfortable as possible to the direction of rotation, allowing the car to escape the danger smooth.3, 'early' referrals' late 'reporting' is also a highway driving one of the safety rules. Whether to overtake or to slow down, want to change the channel and line, or to exit the main road, each intent should be early signals of vehicles around the action has to later. Signals consequences of immediate action is often not the cause of the accident is to interfere with the normal running of other vehicles.

5 ways to solve the bad engine system cooling

Engine and air conditioning system cooling efficiency, causing the water temperature is too high following failure phenomenon:
    In bad traffic - traffic jams or long idling, engine water temperature gauge shows excessive, long working hours electronic fan high gear, the engine noise increases, the failure is most obvious when the temperature is too high off the air conditioning.
    Reminder: air conditioning refrigerant filling too little or too much will reduce the cooling effect.
    The car doctor Quotations: 5 warning signal to determine a patient
    When you take the car to the repair shop, should pay attention to the noise and symptoms related to the maintenance man described the the automotive performance degradation or problems. It can be said, the more you understand the car, the better you can describe the car failed to help the maintenance man to make a correct diagnosis, which prescribe the right medicine.
    1 new or unusual noise is usually the the car fault indication signal. For example, the low hum of voices could be bearing failure, may also just be a tire problem; screaming sound may indicate the need to replace the brake pads, or loose belt. In the description of the failure, it is best to explain clearly the reason or action causing the noise.
    Addition to performance loss or noise indication signal on the instrument panel is another place can not be ignored. Carefully read the user manual of the car, to understand the meaning of various signals that can help you to discover a new failure.
    If you feel the steering wheel while driving tight car to one side, or abnormal vibration in a certain speed range, you need to check the tire or wheel balance and positioning. Just found these problems in a timely manner for maintenance can prevent the failure to continue to expand, but also to avoid a greater loss.
    4. Require special attention with the braking system, braking system have a very close relationship with traffic safety, to ignore such failure is tantamount to take personal and other people's lives do adventure.
    Note the car start smoothly. If the car begins to become difficult to start, the best time to open to the repair station overhaul.

car modification knowledge in multi valve engine technology

 The multi-valve technology by improving the intake air, increasing the output power of the engine. 2-valve engine intake limited cross-sectional area at high speed is likely to cause its intake is not smooth, multi-valve technology will be able to change this situation effectively.


 4 valve engine

    Traditional 2-valve engine can only occupy 1/3 of the area of ​​the top of the combustion chamber as the area of ​​the intake port, the intake efficiency is limited. When the 4-valve engine plot with respect to the 2-valve engine, the cross section of the intake air can be increased more than 50%, and more suitable for high speed running smoothly. Meanwhile, since the 4-valve design may be a spark plug can be disposed at the center of the combustion chamber, the flame of the spark plug can be more evenly distributed to the respective corners of the combustion chamber, the combustion of the mixture can burn more fully, the heat loss is small, so the 4 valve engine is also more conducive to improve combustion efficiency and reduce emissions.

    The 4-valve engine can be designed two camshafts to drive the valve, a driven intake valve, a drive exhaust valve, can be more accurately controlled, and may adopt more new technology. Now, most mainstream 4-valve engine with a double overhead camshaft design. Honda and Mitsubishi in its ordinary civilian car still prefer to use a single overhead camshaft for cost considerations. It needs to be arranged on the camshaft rocker, ultimately driven by rocker valve. This design can reduce costs, but increase the frictional resistance and movement inertia affect the power output when the high engine speed. Honda and Mitsubishi sports car for performance improvement considerations are equipped with a dual overhead camshaft design engine.
3 valve engine

    Early multi-valve engine in general using three valves, this is due to the technical structure of valve 3 is simple - the three valves may be arranged in a straight line, so only need a camshaft of a cylinder can be simultaneously driven into the and exhaust valves. Until now, still a small number of multi-valve engine with this low-cost design, for example, the old Mercedes-Benz V6 and V8 engines, KIA Maxima 1.3 liter engine. Of course, this low-cost design for improving the work efficiency of the engine is very limited.

    4 valve engine

    Traditional 2-valve engine can only occupy 1/3 of the area of ​​the top of the combustion chamber as the area of ​​the intake port, the intake efficiency is limited. When the 4-valve engine plot with respect to the 2-valve engine, the cross section of the intake air can be increased more than 50%, and more suitable for high speed running smoothly. Meanwhile, since the 4-valve design may be a spark plug can be disposed at the center of the combustion chamber, the flame of the spark plug can be more evenly distributed to the respective corners of the combustion chamber, the combustion of the mixture can burn more fully, the heat loss is small, so the 4 valve engine is also more conducive to improve combustion efficiency and reduce emissions

Car Audio routine maintenance tips and four Troubleshooting

The car audio considered important parts in the automotive equipment, good sound allows you to enjoy the journey in the wonderful music, to reduce driving Lawton sense. Especially when you Lu-yu traffic jam, surround sound, high-quality CD series of notes out of rhythm, irritable mood soon evaporated. However, the city's dirty and dust is the biggest enemy of your car stereo, so be sure to pay attention to regular cleaning and maintenance of car audio.

    1 often wipe with a wet cotton swab

    Audio cassette machine platen and the head of the CD player are easy to dust accumulation. The most important parts of the CD player laser head laser head wearing parts and more expensive, should focus on conservation. Although now part of the car stereo in the design process to consider the problem of dust, but the protective measures is necessary, you can often use a wet swab to wipe the cassette tape cartridge, and the disc slot CD player as well as a panel of the sound system.

    2 cleanup tool cleaning tape and CD-ROM

    In addition to audio host kept clean, tape and CD-ROM should guarantee clean. The dirt will not only affect the sound quality of the playback tape and disc damage even be sound. CD player laser head at high speeds, dust, make the laser head deviate from the track of the original laser, resulting in distortion of the sound, and the laser head damage. It is understood, tape and disc cleanup tool can buy in most audio and video store.

    3, slow disk less disc change

    Spring is the high incidence of damage to the car audio laser head, because of the dry climate, prone to static electricity. Put the disk when it is best not to directly touch by hand, do not take the middle, slowly into them, try not to frequent CD changer plug plate to make lighter.

    4 Do not suddenly maximize volume

    Audio use them to avoid a sudden maximize volume, so that the speaker coil will burn, the amplifier will affect the amplitude suddenly increase also burning power amplifier.

    Common Faults

    Car audio is generally difficult to achieve due to the environment of the effect of the same grade home audio, home audio than in the course of some failures easier, Here are some common car audio fault and fault exclusion method.

Positive and negative effects brought by BMW 5 long wheelbase

Wheelbase like discussion today we discussed the car, the house facing south or north just as common and important. Obviously, you can see the impact of increased wheelbase also obvious need long-term feelings only experience the difference.
Positive impact
A space increases. The increase of the wheelbase, often at the same time will increase the track (height is not necessarily). For example, the 2010 BMW wheelbase is 3028 Wheelbase 1558 and 1581, while the the 2011 BMW wheelbase is 3108, the front and rear tracks of 1600 and 1627, respectively. Therefore, the increase of the wheelbase is the means that the vehicle becomes longer fat. The direct benefits of variable length fat of course, is the increased space.
Second, increased comfort. Increased comfort is also well understood. Imagine you lying in a 2 m long bed, bed one was filed a meter high, the other head is still on the ground, it is estimated that you can not lay, but slide down. But if you lie is a 10-meter-long bed, a lift of 1 m, it is estimated that not sleeping, you wake. Although this is an exaggerated example, but the truth is, the longer the width of the car, in the face of the same bumps, the smaller the internal changes, so the more comfortable.
Negative impact
Three car look a bit difficult to avoid touching the rear wheel. The larger the car, see a bit more difficult, "turn to turn, but" I believe we can guess intuitively. But in the end Difficulties How things have changed? How to avoid I am afraid that is not easy to say clearly. To see bit difficult, let's do an experiment.
Attentive friend should ordinarily be able to find this problem: steering wheel, if the pool of water on the ground, there is left round India. Seal of the front and rear wheel does not coincide, sometimes deviate from the big points, sometimes deviate from a small point, steering wheel play more small turning radius, deviate from the big hand on small. If we look at the analysis, you will find: the rear wheel of the imprinted forever in the same side of the inner side of the front wheel.

How to care for BMW OPS DIS V57 tire frequent flat

Their car in heavy rain occurs, such as engine suddenly stalled, brake runaway, which is mostly a flat tire. The experts have warned that the rainy summer, the public car should drive carefully in the rain, after the rain, do not forget to doing the maintenance for the car.
"To the rainy season, more tires damaged leak, one morning today, there are several cars to fill tires." Second Ring Road of an auto repair shop owner Zhang Xiaodong, told reporters slippery due to rainy weather, combined with the road surface is not small puddle, the car quickly through, is likely to hurt the tires.
Remind car owners, rainy day traveling to be careful to avoid the foreign body, encounter puddles when the speed is not too fast. When feeling increasingly heavy or there is a body tilt steering wheel, it may be a flat tire, car owners should find the nearest repair shop processing. Zhang Xiaodong, also listed in the public a rainy car maintenance list.
1, should be promptly cleaned. Some owners believe that rainy day without car wash, In fact, encountered heavy rain, the car should be carried out promptly cleaned, otherwise the gap at the front and rear car tires easily accumulated sludge, moisture hiding them, the car body will rust. To prevent of acidic substances rainwater damage to the body, the most simple and effective way owners can prepare a dry cloth, the body to conduct a simple wipe Until the weather turned fine after the repair shop or 4S shop to the car to a full range of waxing and polishing once sealed glaze.
2, rainy day cover sewing more susceptible to injury. In addition, many owners habits put on a sewing machine to the vehicle, although you can prevent damage to the vehicle surface, but weather such as the case of wind and rain, sewing repeatedly whip paint, especially when sand blown into sewing, to draw countless Road tiny scratches in the body of the vehicle, and over time will cause the paint to darken.
3, the scratch should be repaired immediately. Car surface scratch place, paint protective layer peeling a case of damp weather, rust born. Therefore, the body of the vehicle spray paint peeling or deeper scratches should be repaired immediately, and regular inspection and cleaning drainage holes at the bottom of the door and the body.
4, the self-check whether the brake fluid damp. Produce a lot of water in the rainy season when the wet weather causes the brake fluid cup and into the brake fluid. If moisture into the brake fluid, the heat generated by the vehicle in the braking process transpiration a lot of water vapor, the compressibility of gas will cause Zhidongshiling or even failure.
The owners three cases confirmed brake system: brake very deep need to step on the brakes heard a noise, extended braking distances than ever before, to appear in one of three vehicles to go into the repair plant inspection.

5, headlights, fog into a hidden danger. Rainy day, the car's headlights easily water affected brightness change the direction of the light exposure, may also damage the headlight, a security risk. If mist in the headlights, you can open the headlights. Open 10 minutes after the lights mist began to disappear completely disappeared after one hour; if there is mist, it is necessary to professional service station for processing.