What are the advantages of 4a9 1 engine?

? The advanced design of 4A9 1 engine is embodied in the following aspects:

1 DOHC and MIVEC variable valve timing technology for double overhead camshafts

4A9 1 adopts MIVEC technology, which can not only optimize the valve opening time and phase, but also change the valve opening stroke, improve the air intake, and achieve low fuel consumption, low emission and high performance in a wide speed range. This technology is superior to Honda's VTEC and Toyota's VVTI technology, which do not have these two functions at the same time.

2. Aluminum-magnesium alloy die-casting cylinder block: Mitsubishi 4G series engines, as the representative, are economical small displacement engines widely used in China, all of which are cast iron cylinders. The use of aluminum alloy cylinder block can realize the lightweight of the engine, improve the heat dissipation capacity, acceleration performance and fuel economy, but it will reduce the yield and increase many manufacturing costs. 4A9 1 The result of applying cast aluminum cylinder block is that its overall weight is even less than 80% of 1.3 displacement 4G engine, which is basically equivalent to the 0.8-liter engine used by Chery QQ!

3. Resin intake manifold and rocker cover, and inverted exhaust manifold: Most traditional engines use aluminum or cast iron intake manifold with front exhaust manifold. With this design, 4A9 1 can reduce weight, fuel consumption and cost. However, there may be insufficient air intake at low speed, which needs to be compensated by careful design and adjustment. 4A9 1 solves this problem well.

4. Timing chain drive: In order to reduce production costs, most old engines use timing belts. The belt and tensioner must be replaced every tens of thousands of kilometers. Timing chain, under normal use, has a life of hundreds of thousands of kilometers, and the engine does not need to be replaced until it is scrapped. This alone can reduce the use cost of users' whole life cycle by 5000~ 10000 yuan!

5. Electronic throttle: 4G 1 series engines use traditional cable throttle, and 4A9 series engines use advanced electronic throttle. The sensor detects the signal of the accelerator pedal, and the ECU controls the DC stepping motor on the electronic throttle to control the air intake of the engine and realize the change of the speed. Electronic throttle can not only save fuel, but also reduce the emission of harmful substances. 4A9 series engines can easily meet the most stringent Euro 5 emission standards.

6. Independent ignition device: 4G 1 Engine uses group ignition, and two ignition coils control two cylinders respectively. 4A9 1 adopts independent ignition, and each cylinder has an independent ignition coil. Ignition energy will be higher, ignition time control will be more accurate, and combustion will be more thorough.