1. Toyota 8A history of
Toyota 8A is a 1990s Toyota specifically for the development of a small car engine, which is mainly used in Toyota on some low-end products. Because 8A good power performance and low fuel consumption, low cost control at the same time, popular in the after-market, known as “the power of 1.5, 1.0 fuel consumption.” In 1998 the first batch of imported Toyota 8A engine Xiali in domestic production. In 2000, when Toyota and Tianjin Xiali Automobile Co. joint venture plant, Tianjin Xiali the proximity and easier, after domestic 8A engine mounted in succession on their own Xiali 2000, Yaris, Xiali N3 and other models.
Since the early Toyota 8A engine is external sales, in which non-Toyota cars can also be purchased. So it was represented by Geely series models, through the procurement 8A engine to achieve a power matching the first models. But with the gradual improvement in Toyota’s domestic vehicle layout, 8A engine will no longer be available to non-partner of automobile manufacturers.
flat technology, rugged, durable
the displacement of
8A Toyota engine is 1342ml, maximum power 63kW (86Ps) / 6000rpm, maximum torque of 110N · m / 5200rpm, such a data even today does not seem backward, but also in the assembly curb weight less than 900 kg of Xiali, can be described as a large horse-drawn cart, such dynamic performance just spend little money to be able to enjoy, or to meet the car was part of human psychology.
The engine employed in the structure of the DOHC 16 valve design, the compression ratio is 9.3, liters power 47kW. Using the ignition distributor ignition relatively backward, since the mechanical structure, so less accurate control on ignition timing. andThe car is now widely and there is no variable valve timing assembly, electronic throttle technology. 8A engine technically it can be said without any bright spot, and it become a classic of the most important reason is rugged, durable, low fuel consumption, maintenance is also very convenient, and it is most important to focus on economy car buying public’s point .
using 90 gasoline, made after the still maintaining the quality of Toyota
. 8A engines equipped with catalytic converters, exhaust emissions reached Euro Ⅱ standard. Due to the compression of the engine is relatively low, so even if long-term use of gasoline 90 will not have any problems while using 93 gasoline, it can be more energy efficient, dynamic and better, this is not very picky eaters characteristics suitable for China’s national conditions. 8A engine while still maintaining a certain quality in the localization of Toyota, it is the improvement of product quality, so that these engines in 8A in domestic production accounted for almost half of economic family cars engine room.
Later, Tianjin FAW Toyota 8A engine has been improved, the old technology into a distributor ignition electronic ignition, launched an upgraded version of the engine 8A +. 8A + while the engine is also equipped with an electronic throttle valve, a throttle opening degree not only determined by the depth of the accelerator pedal, but by acquiring a series of data sensors, controlled directly by the ECU opening of the throttle, which also reduces the Fuel consumption. With these improvements, 8A + the maximum power of the engine is improved 5kW, reached 68kW. From the original torque of 110N · m increased 114N · m.
technology and brand royalties let Tianjin FAW began independent research engine
When the Tianjin FAW will have Toyota’s technology and quality engine mounted Charade when the models, Toyota will not only do a silent “dedication” and Tianjin FAW is paid for each of a car engine assembly 8A are required to pay a fee for the technology and brand Toyota, which led to the vehicle relatively high cost. The same is Xiali model, equipped with 1.3L displacement engine models 8A than 1.0 displacement models more expensive over 10,000 yuan. To this end, Tianjin FAW have also started to develop proprietary engine.
Tianjin FAW on the basis of the engine by expanding 8A square boreStyle developed 1.4L engine, and in 2005 began to assemble on the Charade models. But for engine design and development of not only “expand” or “zoom out” so simple. The 1.4L engine is a slight increase in displacement, but the parameters of the engine has not changed. While saving technology and brand royalties, but the simplest way to expand the bore has destroyed the balance of the original engine, this engine 1.4L engine is not as 8A both in noise, fuel consumption or mechanical properties.
At the same time, due to the FAW Toyota 8A engine will no longer be sold to non-cooperative enterprise, so the other domestic auto companies make a determined effort to determine their own R & D . Geely is the first developed their imitation 8A engine, all of a sudden take the initiative in the market. Followed by Great Wall Motor and Lifan cars are also based on the Toyota 8A engine on the completion of the foundation to develop its own engine.
auspicious first 1.3-liter engine is derived MR479Q Toyota 8A, the entire process took 3 years. Geely 8A of this engine will be replaced by an electronic ignition distributor ignition, to solve the technical problem 8A old engine fundamentally. Due to more precise control of ignition timing by the functioning of the engine, so the engine knock largely avoided. At the time of domestic technology and equipment is relatively backward production conditions, the indicators MR479Q fully meet the original performance 8A, the map can be almost exactly the same with Toyota 8A. Geely this engine will be mounted on many of their pride, the US and Japan, free ship, Beauty Leopard, such as Maple’s economy car.
independently developed by Lifan engine 479Q1 also borrowed ready-made experience unlucky, but in particular with minor adjustment is different. 479Q1 maximum power with a 65kW increase than the Toyota 8A and Geely MR479Q the 2kW, maximum torque has also increased 5N · m, and maximum torque speed reduced from 5200rpm to 3500rpm, this tune is more suitable for urban everyday driving. In addition, the Great Wall Wizard, Soyat such as number of independent models are also equipped with imitation 8A engines, and these engines in the structure and parameters are also essentially the same engine with Toyota 8A.
8A engine power matching imitationAnd disadvantages of tuning result in a final performance with the original 8A very different
many brand cars in the form of imitation and secondary development, developed the first engine with independent intellectual property rights. While watching from the engine parameters with no gap between Toyota 8A engine, but in real driving experience, the two are quite different. Among the key point is that there is between the engine and transmission matching and tuning issues. At present, a lot more power data model, its performance is often worse smaller than the data model, which is also derived from this situation abound.
8A original engine after Toyota engineers repeated the tests and careful tuning, coupled with the experience accumulated over the years and completed. Not only that, the transmission gear ratio corresponding to each speed range, and even the whole match and models are also very important. If any part of a problem, dynamic performance will be greatly reduced.
At the same time, Wei-chi, Vizi these models, the prototype car is the Toyota car, Toyota 8A engine itself is developed for that car, the car early stage of development, we have considered the matching of engine power, so overall dynamic performance naturally good. 8A imitation models, just to be on the engine which structure is similar to 8A engine, but the specific calibration can not be consistent with the original 8A, here involves adjustment of the valve means, the ignition timing and fuel injection control and other aspects, the prevailing domestic independent manufacturer’s technical strength, but also difficult to set too perfect. So at the end 8A dynamic performance with the original very different, naturally, it is not surprising.
Summary:
Toyota 8A engine can become a classic, has a special historical background, China’s auto market has just started the era, which by virtue of rugged, durable , fuel-efficient and so has won the trust of many consumers. At the same time use it as a benchmark, some of the national car brand also opened a new road of imitation plus secondary development. Although it does not have outstanding technical highlights, but to some extent it is in line with China’s national conditions, even if it seems to stay in people’s memories of 8A engine is still so wonderful.