How to determine what type of engine is better to give preference to 8 or 16 valve. Characteristics and recommendations.
Many car enthusiasts when buying a car have certain difficulties with the choice of the power unit. And there are long hours of reflection, which engine to give preference to 8 or 16 valve options. This problem is felt especially acute if you take the car in the secondary market. After all, we immediately think about which motor is more economical, it has a greater power and torque after several years of its operation.
Engine design
To get a response to the question of which engine for VAZ, Renault, Kalina or other brand is better and why you need to study their design and know the principle of work. Based on the results obtained, it is possible to identify all the advantages, disadvantages of each model and carry out their comparative analysis.
8 valve engine
The design of the 8 valve engine is considered traditional. It consists of the following main nodes:
The principle of operation consists in the injection of the fuel mixture through the intake channel and at the time of the maximum degree of compression of the piston of fuel due to the formation of the spark, it flammifies. The released energy through the mechanisms system is transmitted to the wheelgrow.
16 valve engine
The main layout of this type of engine is somewhat different from the traditional scheme. These differences are in the following main components of the motor:
- Cylinder block. The location of the cylinders and their number remains the same as in the standard version. That is, four pistons located in one row.
- Valves. This node is one of the main differences. In this type of DVS (internal combustion engine) valves are made pairwise. In each cylinder there are two inlets and two exhaust valves, only 4 per one "boiler" and 16 on the entire motor.
- Camshaft. In this power unit to adjust the valves, i.e. For their timely opening and closure, two camshafts are used. Structurally, they are made similarly to the one that is installed in the 8-valve unit.
The principle of operation of 16 valve internal combustion engine is similar to the previous type. The exception is that the fuel mixture is supplied through two inlets valves, and the exhaust gases are discharged through two exhaust valves.
After studying the main components of the two types of engines, a comparative analysis of these two mechanisms can be carried out.
Comparison of two types of engines
To compare and define the best layout, choose the motors of the same volume. As an analysis of the analysis, we choose, for example, a 1.6 liter power unit, installed on. For better perception, the results of the comparison of the technical characteristics are presented in the form of a table located below:
As can be seen from the comparative analysis of two motors of the same volume, but different layouts, variant V16 is more speed and has a greater power.
Attention! An increase in the traction force led to the installation of larger brake discs with a modified design (the presence of ventilation for cooling).
Advantages of 8 valve engines
By comparing these two types of power units, and having studied the design you can determine their advantages and disadvantages. The advantages of the 8 valve engines include:
- Open the belt of the gas distribution mechanism (TRM). In cases when the belt does not bend the valves.
- Butter. During operation, there are no strict limitations in quality.
- Availability during repair. Small dimensional dimensions provide free access to different places and to any car and engine mechanisms.
- Torque. The 8-valve type of motor can produce a sufficiently high torque at low engine speed.
disadvantages
The traditional scheme has a small number of shortcomings of their layout. Main cons:
- Noise and vibration. The morally obsolete model of the engine has a high noise and vibration during its work.
- Heat gaps. After the established service life, the manufacturer of the power unit requires adjustment of thermal gaps.
- Timing belt. Motor needs periodic adjustment of the belt of the gas distribution mechanism.
Attention! Adjusting thermal gaps requires high accuracy. The manual operation is easy to allow an error.
Advantages of the 16 valve engine
Like all aggregates, this type of engines has its advantages and disadvantages. The benefits include:
disadvantages
Among the minuses can be allocated as follows:
- Trouble belt timber. In cases of belt cliff, the valves bend occurs, which is associated with large capital investments during the repair.
- Bulkiness. The impressive dimensions of the aggregates limit access to the repaired node.
- Motor oil. The presence of hydrocomathers makes high demands on the quality of engine oil. The use of low-quality lubrication leads to the location of the hydrocomsators and their premature replacement.
- Torque. On low revs, the engine has insufficient torque.
View on safety and economy engines
Many car owners argue that 8 valve engines are safer than 16 valve beans. This is due to the consequences as a result of the gap of the timing belt. The improved design of the piston group of the 16-valve engine of 1.8 l, which is installed on modern models of VAZ, Kalina, Renault and other brands eliminates this disadvantage.
During the injection of fuel and removal of combustion waste through two valves, it carries out a uniform distribution and combustion of the mixture. Because of this, the work of the 16-valve engine smooth and economical. At the same time, the technological design of the unit requires expensive professional service.
Council. Residents of remote areas are better to acquire 8 valve engines in view of their unpretentiousness in maintenance and repair.
Every car enthusiast should choose for himself, which engine is suitable for him. In this question, it is necessary to rely on your driving style, financial condition, maintainability of the installation. Also important aspect are consumer reviews and professionals.
