Cars & Motobikes Random

[Wakayama column]Irreversible electrification trend


▲ Matteo Ferrari (Gresini Racing)

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MotoE has been merged with MotoGP since last year (2019). From the stimulating riding scene, it is obvious that the electric motorcycle event has a way to become a sports event.

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I had the opportunity to try the Energica EGO concept car provided by MotoE seven years ago, so I have never had any doubts about this.

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The fuel engine is a completely different riding tool

▲ Energica Ego Proto 2013

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▲ Energica Ego Proto 2013

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Moreover, there have been a lot of test ride reports of electric motorcycles recently. These presentations usually emphasize the amazing power performance of electric motorcycles (the motor can exert maximum torque at very low speeds) and natural controllability.

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Electric motorcycles do have such characteristics. What I want to emphasize here is that electric motorcycles and fuel-engine motorcycles are basically two different riding tools. In the 120-year history of motorcycles, the riding tools people have pursued have always been accompanied by uneasiness when they will fall, but electric motorcycles can give the rider a wealth of driving information, allowing the rider to ride Generate confidence.

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For the writer who has been pursuing the perfect form of motorcycles and has been a test driver for 45 years, there is something wrong with electric motorcycles in this part.

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From a technical point of view there are also significant differences

Next, let us consider the reasons for the differences. The main reasons should include the following 4 points:

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(1) There is no crankshaft that can produce a Gyro effect

As long as the motorcycle wheel frame is rotated and the axis is held, you will find that its state can be changed through the Gyro effect, and this effect will also appear on the crankshaft between the travels, so the movement state of the motorcycle changes When you feel resistance, not only does the rider feel the presence of the motorcycle, but it also brings a sense of relief when manipulating the motorcycle, but the electric motorcycle is not equipped with a crankshaft.

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(2) The torque will not change

Everyone knows that the motorcycle will affect the torque feeling due to the engine explosion interval. In addition, the momentary engine braking caused by the negative torque during the compression stroke will also increase the feeling of the front wheel brake biting, but the motor cannot expect such a reaction. , So it will make people feel that there is a lack of grounding before and after, and it is easy to become like a snake on the road when turning.

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(3) The moment of inertia when the car body is tilted is too large

Electric motorcycles tend to diverge up and down due to the large and heavy batteries. That is to say, the inertia when tilting becomes larger, and the reaction when the body is tipped becomes slower, making it difficult to cut into the rudder angle at the beginning.

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The grounding feeling of the front wheel can be actually felt by cutting into the rudder angle, and this is also the reason for the lack of grounding feeling. In order to make up for this shortcoming, most electric motorcycles will have a situation that is absolutely impossible to see in fuel-engine motorcycles-the load on the front wheels increases.

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(4) The rigid balance of the frame is not perfect

Today’s sports motorcycles generally use the engine fixed by Rigid as a rigid material. In this way, the center axis of rigidity balance and distortion can be adjusted to the best.

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In addition, by placing a six-axis sensor that exerts the effect of the crankshaft gyro (Gyro) on the body, it can also allow the rider to obtain more accurate information on the movement of the motorcycle. However, electric motorcycles have not yet used this technology.

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The technical trend of electric motorcycles that you want to protect

▲ Energica Ego Corsa (Gresini Racing)

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The trend that motorcycles can’t escape electrification is an unchangeable fact. Even if you have a fatal problem, you should overcome it and continue to upgrade and evolve. Including the improvement of motorcycles (now models with flywheels), body size and tire styles, it is expected that electric motorcycles may move in a completely different direction from fuel-engine motorcycles.

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If you want to enjoy the pleasure of riding an electric motorcycle, you may have to let my own feelings evolve.

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“Webike Famous Column” Wakayama Leehom
Compiled by “Webike Taiwan” editorial department

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