Honda Fit car one cylinder two spark plugs why

Because they are all Japanese cars.

Honda Fit. The engine is the engine used in the early models, this Honda Fit i-DSI engine, which uses dual spark plugs.

Devise. So although it is a four-cylinder engine, it is designed as a double spark plug, that is, a cylinder is equipped with two spark plugs, and the four-cylinder is 8 spark plugs.

Many people probably know that most of the car engines.

All are single spark plug designs, that is, one cylinder is equipped with one spark plug. Through the ignition of the spark plug and the combustion of the mixed gas in the cylinder, the work process of the engine is completed.

So why is this four-cylinder engine from the Fit designed with dual spark plugs? The main purpose is to improve the engine's low-torque characteristics and improve fuel economy. The Fit i-DSI engine, despite its small displacement, has plenty of low-torque power on city roads.

Medium driving, no less than some large displacement models, and the actual fuel consumption of the vehicle is also ultra-low.

Unlike the common spark plug for one cylinder, the spark plug of the Fit engine is installed symmetrically on both sides of the cylinder. The two spark plugs are at an equal distance from the center of the cylinder combustion chamber and the ignition time is controlled by intelligent sequential phase ignition. According to the actual demand change, at medium and low speeds, there is a certain interval between the ignition time of the two spark plugs; At high rpm, the ignition time of the two spark plugs tends to coincide.

The Honda Fit's i-DSI engine, with a dual spark plug design, at the same time, simplified the single-cylinder four-valve to a single-cylinder two-valve, and eliminated the complicated Honda car.

Department of proprietary "variable valve timing."

and Valve Lift Electronic Control System (VTEC)", the structure is greatly simplified, and the failure rate is also reduced. Therefore, the design of double spark plugs can simplify the hardware structure of the engine, and it is not necessary to use an overly complicated valve mechanism, which can also save the manufacturing cost of the engine to a certain extent.

Honda Fit's i-DSI engine ignition control, ECM PCM uses rev signals and throttle valves according to changes in engine operating conditions and combustion conditions.

Position signal, intake pressure signal and vehicle speed signal, logic analysis of the best control conditions, automatic adjustment of the size and time difference of the ignition advance angle of the front and rear spark plugs.

Achieve optimal control of power, economy and purification.

Honda Fit's i-DSI engine dual spark plug ignition system adopts intelligent control of ignition time, and the ignition time of two spark plugs is ignited at the same time during idle conditions, which can improve idle stability and exhaust emission indicators. At medium and low speeds, the two spark plugs are ignited differently to improve the fuel economy of the engine; At high speed and high load, the two spark plugs are ignited at the same time, which increases the maximum torque of the engine and shows better dynamics.

Well, the engine of the Honda Fit four-cylinder is designed with dual spark plugs, and there are 8 spark plugs in the four cylinders. This design saves the manufacturing cost of the engine, improves the fuel economy of the engine, and can also reduce the fuel consumption of the vehicle. Despite its many advantages, it was only used on the earlier Honda Fit models at the time, and was eventually replaced by engines with new technology.

Honda's engineers arranged two spark plugs diagonally on the top of each cylinder. And each spark plug has an independent ignition coil to control the ignition timing, which means that there are 8 independent ignition coils. Honda's i-DSI engine was developed based on the technology of a single overhead camshaft with two valves per cylinder.

This technical detail can be seen in the image below. It doesn't matter if it's a two-cylinder, or a multi-cylinder, or even multiple spark plugs. Its working principle will not change, only the control performance of each controller will be improved.

Depending on the operating conditions, the I-DSI system can produce two different ignitions through two spark plugs during the combustion process, the first of which ignites the mixture, just like a conventional ignition. The second ignition is a little later, which can ignite the remaining gasoline in the recylinder that is not completely burned. Honda has designed a high-tumbling airway specifically for this purpose, which helps to optimize the mixing of gasoline and air.

The engine of the Honda Fit sedan is a four-cylinder engine with dual spark plugs for direct ignition, so there are eight spark plugs. It uses a four-cylinder electronically controlled multi-point sequential injection system, while the ignition system uses an intelligent dual spark plug direct ignition system.

That's the intelligent layered ignition method adopted by Honda, which is used on the displacement car, and why is it on the car, because the displacement car is mainly used for private commuting, focusing on the purpose of low rotation and high torque and economic fuel saving, so two spark plugs are used on each cylinder. There is no problem at all with this car to add 92 or even 90 gasoline, you have to add 95 to have money, well, it will not cause damage to the car, but it will not do any good, the octane number is high, it is mainly to avoid. Engine occurrence leopard is common in the rigid pressure ratio, regardless of the supercharged engine, and the ordinary naturally aspirated engine is really not necessary.

The Fit is equipped with a naturally aspirated engine of Earth Dream Technology, using I-VTEC and in-cylinder direct injection technology, with a maximum output of 96kW 6600rpm and a peak torque of 155Nm 4600rpm, with low fuel consumption under comprehensive working conditions, matched with 5-speed manual and CVT continuously variable transmissions.

Because then the engine will be better, and it will be more popular, and it is also a feature of the car, and it will also make the car go faster.

In this way, you can meet a lot of your experience on the road, and the displacement is already very large, 8 spark plugs have been able to meet many needs of the vehicle, which will make the performance play to the maximum experience and ensure safety.

Because this will be more fully combusted, there will be no residual combustion gas in the cylinder.

It is because such a design will be more scientific and more in line with the performance of this car, so this situation will occur.

The main thing is to play vividly on IVTEC!

The Honda Fit's four-cylinder engine does have 8 spark plugs. Why does the Honda Fit use a 4-cylinder engine and 8 spark plugs? In fact, the reason is very simple, that is, two spark plugs are used in each cylinder block of the engine, and the compression stroke of each cylinder is ignited once, but then the other spark plug also begins to ignite, which greatly increases the thermal efficiency of this engine, so that the gasoline that is not fully burned in the cylinder body is burned again, which not only increases the power, but also saves fuel consumption.

The result is a dual-ignition system that allows the Honda Fit to use a naturally aspirated engine that works at its best. <>

The engine technology of the Honda Fit car uses a special process, which is called the intelligent dual-sequential ignition system, which is the dual-ignition system I mentioned above. In short, the two spark plugs of each cylinder are arranged in a symmetrical form, respectively at the exhaust side and the intake side, and then the ignition time of the two spark plugs is controlled by the trip computer, so as to meet the needs of the engine to do work. <>

Honda Fit this car is still very good, both in fuel consumption and in the power line is very good, but I personally think that this car can still be purchased if you are for commuting to work, if you are for family use then this car is not suitable, because the space of this car is relatively small, and a family of four sitting in it is very crowded. But the strange thing is that the value retention rate of this car is very high, but I found that the reason why this car has such a high value retention rate is because this car is very economical, and the use of a spark plug dual ignition system allows this small displacement car to maximize the power output. <>

With the merger of the world economy, our domestic automobile market is becoming more and more huge, in my country I have such a significant feature, that is, many consumers like large displacement cars, and rarely like small displacement cars, this is because we Chinese consumers pursue the handling and power of cars. This is not the case in Japan, a country where consumers prefer cars with a small displacement because their pace of life is slower and their requirements for cars are not too high.

Yes, because when it was designed, there was such a design, and it was also to be able to have a larger displacement and power, so there will be 8 of them.

It's really like this, there are indeed 8 of them, and this is also done for better ignition, which can increase thermal efficiency and can be better driven.

Yes, and this is also a very critical part, and then it has a decisive effect on the engine, the output is getting more and more power, and the fuel is very sufficient.

Yes, because this increases the thermal efficiency of the engine, which can fully burn gasoline, so it will produce different car constructions.

The best thing about the Honda Fit engine is that the wide permeability configuration inside is very good, and it is also very fuel-efficient, the failure rate is very low, and it will not be damaged after driving for a period of time.

Honda Fit engines, they are all made by the original factory, and this cavity elimination is a unique skill of their own, other manufacturers will not have this kind of skillful technology, so there will be high sales.

In this way, the engine performance of the car will be particularly good, and the driving will be very comfortable, and the sound of the engine will be particularly good.

This crack macro can achieve a very fast speed, the car will be more fuel-efficient, and at the same time, it can also achieve a good light source and closed situation, which can easily solve the problem. Respectful cracks.

This car uses a special engine, this car is very powerful, the appearance is also very stylish, and the price is also very reasonable.

If you install this engine on the 28 bars, you can second the plane.

The analysis is as follows: 1. The engine of the Honda Fit sedan is a four-cylinder engine with dual spark plugs for direct ignition, so there are eight spark plugs. It uses a four-cylinder electronically controlled multi-point sequential injection system, while the ignition system uses an intelligent dual spark plug direct ignition system.

2. The purpose of direct ignition with double spark plugs is as follows:

1) The direct ignition of double spark plugs can shorten the stroke of flame propagation, improve the combustion speed of combustible mixture, improve the dynamic index, and reduce fuel consumption.

2) The time difference of double spark plug direct ignition oil can meet the needs of working conditions, which can realize layered combustion, improve purification index and reduce fuel consumption.

3) The direct ignition of double spark plugs can improve the combustion conditions, eliminate the deflagration hazard, and prolong the service life of related components.

4) The direct ignition of double spark plugs can improve the reliability of the ignition system, and it is not easy to have "lack of cylinder" failure.

5) The use of double spark plugs and double ignition coils makes the current through the ignition coil small per unit time at the same speed, and the ignition coil is not easy to heat, which can increase the current and conduction time of the primary side of the ignition coil, and can provide sufficient ignition energy in the speed range of 9000r min.

3. Due to the intelligent double spark plug direct ignition system, the power, economy and purification of the car have been improved, so as to simplify the structure of the hardware system.

Only two spark plugs per cylinder are allowed.

The Honda Fit has 4 spark plugs, and the Fit engine is 4 cylinders, and each cylinder has a spark plug. Honda Fit spark plug 100,000 km replacement. It uses a double iridium double needle spark plug.

The better the spark plug material, the longer it will last, and the spark plug material and model can be selected according to the engine.

The Honda Fit has 4 spark plugs, and the Fit engine is 4 cylinders, each with spark plugs. Honda Fit spark plug 100,000 km replacement. It uses a double iridium double needle spark plug.

The better the spark plug material, the longer it will last, and the spark plug material and model can be selected according to the engine.

The steps to replace the spark plug are as follows:

1. Unplug the ignition coil harness plug and disassemble the ignition coil fixing bolt; Check the spark plug (check whether the binding post is damaged, check whether the insulator is broken, check whether the electrodes are worn, etc.);

2. Select the appropriate tool, assemble the tool, disassemble the spark plug, and take out the spark plug one by one; Cover the spark plug hole on the cylinder with a cleaning cloth to prevent objects from entering the inside of the cylinder;

3. Align the ignition coil with the spark plug, install it in place, and use a tool to screw in the bolt; Clean the gage, measure the spark plug gap, and judge the spark plug;

4. Check whether there is a problem with the appearance of the new spark plug, install the spark plug into a special sleeve, screw it into the spark plug hole and use a digital torque wrench, tighten the spark plug, turn off the ignition switch, open the hood, and install the three-piece set;

5. Use a digital torque wrench to tighten. Start the vehicle, eliminate faults, and organize the station.