201223820 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種電動機車限速切換裝置，尤指一種 不必變更整機結構，直接判斷啟動單元訊號作為電動機車 限速切換依據之電動機車限速切換裝置。 【先前技術】 因使用電動機車的使用者騎乘環境及習慣不同，故非 鲁所有使用者均滿忍原訂的最高限速值，但早期電動機車又 未提供可設定最高限速值功能，因此只能依固定限速值使 用’無法改變限速。 近期電動機車已針對此項缺失提出改良方案，請進一 步參閱圖5,為一習用電動機車之局部示意圖，該電動機車 於其儀錶板上進一步增設有一限速設定按鈕53，供使用者 切換咼限速值或低限速值作為最高限速 。因此，此一電動 機車係藉由變更整機結構，以硬體手段增加一限速設定按 ®紐53來達到切換最高限制值的目的；然而，變更整機結構、 增加硬體元件就電動機車製造商而言無疑提高製作成本， 自然提高賣價，將成本轉嫁到消費者身上。 此外’誠如圖5所示之習用電動機車，其啟動單元包 有電門把手51、一煞車桿54、一啟動按鍵55及一主 開關52;該電門把手51、該煞車桿54及該啟動按鍵“係 由使用者操作，並輸出一電門訊號、一煞車訊號及啟動按 鍵訊號。再請進一步參閱圖6，啟動該電動機車時係依照以 下步驟’首先將鑰匙插入主開關52中，由關閉位置（〇fF) 201223820 轉動至開啟位置（〇fsn<5fli . 。太& m丄 _ ( N)S81，此時❹者僅需操作該煞車桿 令煞車訊號為已煞車狀離，並同.總欢仙* ^ 亚丨』時觸發啟動按鍵令啟動201223820 VI. Description of the Invention: [Technical Field] The present invention relates to a speed limit switching device for an electric motor vehicle, and more particularly to a motor limit for directly determining the starting unit signal as a basis for switching the speed limit of the electric motor vehicle without changing the structure of the whole machine. Speed switching device. [Prior Art] Because the environment and habits of the users who use the electric motor car are different, all the users of the non-Rulu are full of the maximum speed limit value, but the early electric motor car does not provide the function of setting the maximum speed limit value. Therefore, it can only be used according to the fixed speed limit value. Recently, the electric motor vehicle has proposed an improved solution for this lack. Please refer to FIG. 5 for a partial schematic view of a conventional electric motor vehicle. The electric motor vehicle further has a speed limit setting button 53 on the instrument panel for the user to switch the limit. The speed value or the low speed limit value is used as the maximum speed limit. Therefore, by changing the structure of the whole machine, the electric motor system increases the speed limit setting by the hardware to press the button 53 to achieve the purpose of switching the maximum limit value; however, changing the structure of the whole machine and adding the hardware components to the electric motor car Manufacturers will undoubtedly increase production costs, naturally increase the selling price, and pass the cost on to consumers. In addition, as shown in FIG. 5, the starting unit includes a door handle 51, a lever 54, a start button 55 and a main switch 52; the door handle 51, the lever 54 and the start button "It is operated by the user and outputs a door signal, a vehicle signal and a start button signal. Please refer to Figure 6 again. When starting the motor car, follow the steps below: 'First insert the key into the main switch 52, from the closed position. (〇fF) 201223820 Turn to the open position (〇fsn<5fli . too & m丄_ (N)S81, at this time, the latter only needs to operate the brake lever to make the brake signal as the vehicle has been separated, and the same. When you win the fairy * ^ Aachen, the start button is triggered to start
按鍵訊號為已啟動狀熊.如心B 恶b82，如此即可啟動該電動機車 S83 ’此時使用者只要轉動雷M ^ ^ 受得動電門把手，電動機車即依據電門 把手轉動角度大小，改變鱼涉，甚古、* A· 汉變早迷，最兩速度則不超過設定後 的最尚限速值。 综上所述，目前電動機車切換最高限速方式有待進一 步改良。 【發明内容】 有鑑於上述現有電動機車限速切換裝置之技術缺陷， 本發明的主要目的係提出一種電動機車限速切換裝置，不 僅能確保電動機車騎士能在安全狀態下啟動電動機車進行 騎乘，亦能直接利用電動機車上原有經使用者操作產生作 動訊號進行最高限速的切換動作，並只要下次再啟閉騎乘 電動機車，即可以新最高限速值進行限速控制。 欲達上述目的所使用的主要技術手段係令該電動機車 限速切換裝置包含有： 一主開關； 一限速選擇單元，係由使用者操作，輸出一第一作動 訊號及一第二作動訊號；其中該限速選擇單元可包含有一 煞車桿、-電門手把及—啟動按鍵；目此中央控制器係可 以煞車訊號及電門訊號作為第一及第二作動訊號，或可將 電門訊號及啟動按鍵訊號作為第一及第二作動訊號。 一中央.控制器，係與該主開關及該限速選擇單元電連 201223820 第二作動訊號，且該中央控制 中央控制器係依據第一及第二 速切換模式，並於進入該限速 接，以接收第一作動訊號及 器内建一限速切換模式，該 作動訊號狀態，判斷進入限 切換模式後，將原％ $ & 、°疋限速值轉換為重新設定限速值，並 儲存作為啟動後的—最高限速值；及 一電源供應電路，在φ& , 係電連接至該中央控制器，用以供應 該中央控制器所需之工作電源。The button signal is the activated bear. If the heart B is evil b82, then the motor car S83 can be started. At this time, the user only needs to turn the lightning M ^ ^ to receive the electric door handle, and the electric motor car changes according to the rotation angle of the electric door handle. Fish involved, very ancient, * A · Han changed early, the most two speeds did not exceed the set maximum speed limit. In summary, the current maximum speed limit mode for electric motor vehicles needs to be further improved. SUMMARY OF THE INVENTION In view of the technical defects of the above-mentioned conventional motor vehicle speed limit switching device, the main object of the present invention is to provide a motor vehicle speed limit switching device, which not only ensures that the electric motor vehicle rider can start the electric motor vehicle in a safe state for riding. It is also possible to directly use the operation signal generated by the user on the electric motor to perform the maximum speed limit switching operation, and the speed limit control can be performed at the new maximum speed limit value as long as the riding motor vehicle is reopened and closed next time. The main technical means for achieving the above purpose is that the motor vehicle speed limit switching device comprises: a main switch; a speed limit selecting unit is operated by the user to output a first actuation signal and a second actuation signal. The speed limit selection unit may include a brake lever, a switch handle, and a start button; the central controller may use the brake signal and the electric gate signal as the first and second actuation signals, or may activate the electric gate signal and start The button signal is used as the first and second actuation signals. a central controller is electrically connected to the main switch and the speed limit selection unit 201223820 second actuation signal, and the central control central controller is based on the first and second speed switching modes, and enters the speed limit connection Receiving the first action signal and the built-in speed limit switching mode, the action signal state, after determining the entry limit switching mode, converting the original %$&, °疋 speed limit value to the reset speed limit value, and The storage is the post-start-up speed limit value; and a power supply circuit is electrically connected to the central controller at φ& for supplying the working power required by the central controller.
/本發月該中央控制器係於騎士將錄匙插入主開關轉動 後始接收該限速選擇單元輸出的作動訊號，判斷是否進 入限速切換模式》 。當中央控制器判斷電門訊號的電門開度為G且煞車訊 號為已煞車時，則判斷不進人限速切換模式，而會進一步 判斷啟動按鍵疋否已為啟動狀態；當判斷為啟動狀態，則 確定騎士已確實準備騎乘電動機車，並啟動電動機車，再 依據電門訊號的電門開度調整電動機車轉速，並限制轉速 不超過原設定限速值；反之，則不啟動電動機車；是以， 本發明的中央控制器必須加入啟動按鍵的判斷，才決定是 否啟動電動機車，以有效提高電動機車騎士騎乘安全性。 當中央控制器於主開關轉動後，判斷電門訊號為電門 開度達一半以上且煞車訊號為已煞車時，則確定騎士欲進 入限速切換模式，此時將原設定限速值轉換為重新設定限 速值，並儲存作為啟動後的一最高限速值；因此，當使用 者關閉主開關再重新啟動主開關為開啟狀態，並由該中央 控制器依照上段判斷過程確定騎士已確實準備騎乘電動機 車後，即啟動電動機車，並讀取重新設定限速值限制轉速 201223820 不超過此-限速值。是以 緩使用去握“ 令赞“要以原有電動機車上 ，口使用者_作產生作動訊號進行最高限速的切換動作並 只要下次再啟閉騎乘電動機車，即可以新最高限速值進行 限速控制。 η由上述說可知，本發明在使用者轉動主開關至開啟狀 態後’中央控制器必須同時確認電門訊號為零、煞車訊號 為煞車狀態及啟動按鍵訊號為啟動狀態肖，才&據電門訊 號改變車速’使該電動車行駛’因此，使用者無法只轉動 主開關至開啟狀態就依據電門訊號改變車速，進而提高啟 動行駛的安全性，且本發明的中央控制器直接以限速選擇 早兀輸出的第一及第二作動訊號，作為判斷使用者是否切 換最尚限速值的依據，如此即不會造成因誤觸發單按鍵而 造成誤切換之情形。 【實施方式】 請參考圖1及2，係為本發明電動機車限速切換裝置， 其中包含有： 一主開關28，係供錄匙插入，並依錄起插入轉動，轉 動至與電源導通時，呈開啟狀態，反轉至電源斷路時，則 呈關閉狀態； 一限速選擇單元，係由使用者操作，至少輸出一第一 作動訊號及一第二作動訊號；於本實施例中，該限速選擇 單元係包含有一煞車桿22及一電門手把23，係由使用者操 作並輸出煞車訊號及電門訊號’而該第一作動訊號係為煞車 訊號，第二作動訊號為電門訊號；或可為一電門手把23及 6 201223820 一啟動按鍵24,係由使用者操作並輸出電門訊號及啟動按 鍵訊號’而該第一作動訊號係為電門訊號，第二作動訊號為 啟動按鍵訊號； 一中央控制器21 ’係分別與該主開關28、該煞車桿 22、該電門手把23及該啟動按鍵24電連接，並接收來自 該限速選擇單元的煞車訊號、電門訊號及啟動按鍵訊號， 且該中央控制器21内建一限速切換模式及一騎乘模式，該 中央控制器21係依據第一及第二作動訊號狀態，判斷進入 # 限速切換模式或騎乘模式，並於進入該限速切換模式後， 將原設定限速值轉換為重新設定限速值，並儲存作為啟動 後的一最尚限速值；又該中央控制器21係又電連接該電動 機車的一儀表25及一電動馬達26,以驅動儀表顯示一限速 狀態指不碼，並依據電門訊號改變驅動該電動馬達26轉動 並調整轉速；及 一電源供應電路27 ’係電連接至該中央控制器21，以 供應該中央控制器21所需之電源。 • λ電動機車可進一步設置-啟動單元，以配合包含有 有煞車桿22及電門手把23的限速選擇單元，亦與該中央 控制器21電連接，其中該啟動單元係同時作動該煞車桿& 及-啟動按鍵24,由使用者操作並啟動該電動機車行驶。 以上為本發明電動機車限速切換裝置的硬體結構說 月以下謹進一步說明本發明的中央控制器2彳判斷使用者 使用狀態的對應執行步驟。 請先參閱圖3所示，當主開關28為開啟狀態後（S10)， 中央控制$ 21會進—步接收電門訊號及煞車訊號，作判斷 201223820 使用者欲使用騎乘或切換限速功能。 當中央控制器21判斷電門訊號的電門開度為〇時 (S11 )，會再判斷煞車訊號為已煞車且啟動按鍵為啟動狀態 (S12);此時，該中央控制器21即確定使用者欲騎乘電動 機車’而不會進入切換限速功能，而控制電動馬達26依電 門訊號的電門開度改變轉速，並依原設定限速值控制電動 馬達26轉動。若一開始判斷電門開度不為〇(s 11 )，則縱使 判斷煞車訊號為已煞車且啟動按鍵為啟動狀態（S14)，仍不 _ 控制電動馬達26轉動’即電動機車不啟動；意即，不啟動 電動機車（S1 5)。同理，如判斷電門訊號的電門開度為〇時 (S. 11)’但判斷煞車號為未煞車狀態或啟動按鍵為未啟動 狀態（S1 2)’則在主開關28仍為開啟狀態下，繼續判斷電 門訊號的電門開度為0、煞車訊號為已煞車狀態以及啟動按 鍵為啟動狀態（S12)後’才確定控制電動馬達轉動，並依原 設定限速值行駛（S13)。 惟一般使用者不滿意原設定限速值，而欲改變騎乘時 籲的最高限速值；故以下進一步以實施例說明本發明提供使 用者進行限速切換過程。 請配合參閱圖4所示’當中央控制器21於主開關28 開啟後（S20)會延遲一段時間（S21)再接收並判斷煞車訊號 及電門訊號。 當中央控制器21判斷煞車訊號為已煞車狀態（S22)且 電門訊號的電子開度已達一半以上（S23)，則進入限速切換 模式（S24);反之，若判斷煞車訊號為未煞車狀態（S22)或電 門訊號的電門開度未達一半以上者（S23)，則不進入該限速 201223820 切換模式S31，並進入圖3的騎乘模式判斷⑻。 進入該限速切換模式後（S24)，將原m速值切換 為重新設定限速值，並儲存作為下次重新啟動的最高限速 值’再驅動儀表顯示重新設定限速值之限速狀態指示碼， 即結束限速切換式模^於本實施例中，由於中央控制器21 可包含二組高低不同的限速值，故於進入限速切換模式後 (S24)，係讀取原設定限速值，與二組高低限速值進行比對， 以判斷欲切換至低限速或高限速（S25);若判斷原設定限速 值為高限速值時，則代表使用者欲以低限速值為最高限速 值將該低限速值设為該重新設定限速值並予以儲存於該 中央控制器21 (S 2 6 )，再顯示低限速值之限速狀態指示碼於 儀表上（S27);反之，若判斷原設定限速值為低限速值時， 則代表使用者欲將原設定限速值為低限速值，故將高限速 值设定為該重新設定高限速值並予以儲存於該中央控制器 21 (S29) ’再顯示高限速值之限速狀態指示碼於儀表上 (S30)，並結束限速切換模式（S31)。 爾後，使用者欲以本次的重新設定高限速值作為騎乘 最咼限速的依據，則使用者必須轉動鑰匙將主開關28轉動 至關閉狀態（S32)，再重新轉動主開關28(S33)呈開啟狀態 (S33)，並操作電門手把及煞車，此時，中央控制器在主開 關為開啟狀態下’判斷電門訊號的電門開度為（S34)、煞車 訊號為已煞車狀態且啟動按鍵為啟動狀態（S35)，即控制電 動馬達轉動，依重新設定限速值作為騎乘最高限速的依據 加以行駛（S36)。當然’為確保騎乘安全，如判斷電門訊號 的電門開度非為〇(S33)，縱使煞車訊號為已煞車狀態且啟 201223820 動按鍵已按下（S37) ’則仍不驅動電動馬達轉動，意即無法 啟動電動機車（S38)。 由圖4可知，本發明中央控制器確實只要藉由使用者 操作電動機車上原有的電門把手及煞車，即可完成限速切 換功能，此外，中央控制器亦可以啟動按鍵訊號取代上述煞 車訊號，也就是說，可藉由電門訊號與啟動按鍵訊號作為判 斷是否進入限速切換之依據，意即當該中央控制器判斷啟閉 按鍵訊號已作動且電門訊號的電子開度已達一半以上，則 鲁進入限速切換模式；反之，若判斷啟動按鍵訊號未作動或 電門訊號的電門開度未達一半以上者，則不進入該限速切 換模式。 綜上所述，當使用者欲啟動該電動機車時，必須同時 保持電門訊號為零，並啟動該煞車桿與該啟動按鍵，如此 除了可以避免因單鍵誤觸發造成該電動機車誤發動，亦因 電門手把不被啟動係為一發動該電動機車之必要條件，因 此該電動機車於發動時並不會無預警行欲，可避免使用者 •受到傷害，又由於使用者切換該限速值必須同時對該煞車 +干與違電門手把做觸發動作，因此不會造成單鍵誤觸發之 情形，故本發明確實可以改良習用之電動機車啟動裝置與 限速切換裝置之缺陷。 【圖式簡單說明】 圖1 .為本發明之一較佳實施例電動機車局部外觀圖。 圓2 :為本發明之限速切換裝置的示意圖。 圖3 :為本發明之啟動流程示意圖。 10 201223820 圖4 ··為本發明之限速切換及啟動流程示意圖。 圖5:為習知之電動機車局部外觀圖。 圖6 :為習用電動機車的啟動流程示意圖。 22煞車桿 24啟動按鍵 26電動馬達 28主開關 52主開關 54煞車桿 【主要元件符號說明】 21中央控制器 23電門手把 25儀表 27電源供應電路 51電門手把 53限速設定按鈕 5 5啟動按鍵/ The current central controller is to receive the action signal output by the speed limit selection unit after the knight inserts the key into the main switch to determine whether to enter the speed limit switching mode. When the central controller determines that the door opening degree of the electric door signal is G and the braking signal is the vehicle being braked, it judges that the speed limit switching mode is not entered, and further determines whether the starting button is in the starting state; when it is determined to be the starting state, Then it is determined that the knight is indeed ready to ride the electric motor car, and start the electric motor car, and then adjust the electric motor car speed according to the electric door opening degree of the electric door signal, and limit the rotation speed not to exceed the original set speed limit value; otherwise, the electric motor car is not started; The central controller of the present invention must add the judgment of the start button to determine whether to start the electric motor to effectively improve the riding safety of the electric motor vehicle rider. When the central controller rotates the main switch and judges that the electric door signal is more than half of the electric door opening degree and the brake signal is braked, it is determined that the knight wants to enter the speed limit switching mode, and the original set speed limit value is converted into resetting. The speed limit value is stored as a maximum speed limit value after startup; therefore, when the user turns off the main switch and then restarts the main switch to the on state, the central controller determines that the knight is indeed ready to ride according to the above judgment process. After the electric motor car, start the electric motor car and read the reset speed limit value limit speed 201223820 does not exceed this - speed limit value. In order to use the slow-moving use of the "Lang Zan" to use the original motor car, the port user _ to generate the action signal to perform the maximum speed limit switching action and as long as the next time you turn on and off the riding motor car, you can reach the new maximum limit The speed value is used for speed limit control. η As can be seen from the above, after the user turns the main switch to the on state, the central controller must simultaneously confirm that the gate signal is zero, the brake signal is the brake state, and the start button signal is the startup state. Changing the vehicle speed 'to drive the electric vehicle', therefore, the user can not change the vehicle speed according to the electric door signal only by turning the main switch to the open state, thereby improving the safety of the starting driving, and the central controller of the present invention directly selects the speed limit early. The output of the first and second actuation signals is used as a basis for determining whether the user switches the most current speed limit value, so that no accidental switching occurs due to a false triggering of a single button. [Embodiment] Please refer to FIG. 1 and FIG. 2, which are the speed limit switching device for an electric motor vehicle according to the present invention, which includes: a main switch 28 for inserting a recording key, and rotating according to the recording, rotating to be turned on when the power is turned on. When the power is turned off, the power is turned off, and then turned off; a speed limit selecting unit is operated by the user to output at least a first motion signal and a second motion signal; in this embodiment, The speed limit selection unit includes a handlebar 22 and a switch handle 23, which is operated by the user and outputs a brake signal and an electric door signal ', and the first actuation signal is a brake signal, and the second actuation signal is an electric door signal; or It can be a door handle 23 and 6 201223820 a start button 24, which is operated by the user and outputs a door signal and a start button signal. The first action signal is a door signal, and the second action signal is a start button signal; The central controller 21' is electrically connected to the main switch 28, the brake lever 22, the switch handle 23 and the start button 24, respectively, and receives the brake signal from the speed limit selection unit. The number, the door signal and the start button signal, and the central controller 21 has a speed limit switching mode and a riding mode. The central controller 21 determines to enter the # speed limit switching mode according to the first and second actuation signal states. Or the riding mode, and after entering the speed limit switching mode, the original set speed limit value is converted to the reset speed limit value, and stored as the most current speed limit value after starting; and the central controller 21 is again Electrically connecting a meter 25 of the electric motor vehicle and an electric motor 26 to drive the meter to display a speed limit state indicating no code, and driving the electric motor 26 to rotate according to the switch signal to adjust the rotation speed; and a power supply circuit 27' It is electrically connected to the central controller 21 to supply the power required by the central controller 21. • The lambda motor car may further be provided with a starter unit for cooperating with the speed limit selection unit including the brake lever 22 and the switch handle 23, and is also electrically connected to the central controller 21, wherein the activation unit simultaneously activates the brake lever The & and - start button 24 is operated by the user and starts the motor car. The above is the hardware structure of the motor vehicle speed limit switching device of the present invention. The corresponding execution steps of the central controller 2 of the present invention for determining the user's use state will be further described below. Please refer to FIG. 3 first, when the main switch 28 is turned on (S10), the central control $21 will step forward to receive the gate signal and the brake signal for judging 201223820. The user wants to use the ride or switch speed limit function. When the central controller 21 determines that the door opening degree of the electric door signal is 〇 (S11), it is determined that the brake signal is the braked vehicle and the start button is in the activated state (S12); at this time, the central controller 21 determines the user desire Ride the electric motor vehicle' without entering the switching speed limit function, and control the electric motor 26 to change the rotation speed according to the door opening degree of the electric door signal, and control the electric motor 26 to rotate according to the original set speed limit value. If it is determined at the beginning that the opening degree of the switch is not 〇 (s 11 ), even if it is determined that the brake signal is braked and the start button is in the activated state (S14), the electric motor 26 is not controlled to rotate, that is, the electric motor vehicle does not start; , do not start the electric motor car (S1 5). Similarly, if it is judged that the door opening degree of the electric door signal is 〇 (S. 11) 'but it is judged that the car number is the un-driving state or the start button is the un-started state (S1 2)', then the main switch 28 is still open. Then, it is determined that the electric door opening of the electric door signal is 0, the braking signal is the braking state, and the start button is in the starting state (S12), then it is determined that the electric motor is controlled to rotate, and the driving speed is set according to the original set speed limit (S13). However, the general user is dissatisfied with the original set speed limit value, and wants to change the maximum speed limit value of the ride time; therefore, the present invention further provides an embodiment to provide a speed limit switching process for the user. Please refer to FIG. 4' when the central controller 21 is turned on (S20) after the main switch 28 is turned on (S20), and then the bus signal and the gate signal are received and judged. When the central controller 21 determines that the brake signal is in the braked state (S22) and the electronic opening of the switch signal has reached more than half (S23), the speed limit switching mode is entered (S24); otherwise, if the brake signal is determined to be in the untrained state (S22) or the door opening of the electric door signal is less than half (S23), the speed limit 201223820 is not entered in the switching mode S31, and the riding mode judgment (8) of Fig. 3 is entered. After entering the speed limit switching mode (S24), the original m speed value is switched to the reset speed limit value, and the maximum speed limit value as the next restart is saved, and the speed limit state of the reset speed limit value is re-driven. In the present embodiment, since the central controller 21 can include two sets of different speed limit values, after entering the speed limit switching mode (S24), the original setting is read. The speed limit value is compared with the two sets of high and low speed limit values to determine whether to switch to the low speed limit or the high speed limit (S25); if it is determined that the original set speed limit value is the high speed limit value, it means the user desires The low speed limit value is set as the maximum speed limit value, and the low speed limit value is set to the reset speed limit value and stored in the central controller 21 (S 2 6 ), and then the speed limit state indication of the low speed limit value is displayed. The code is on the meter (S27); otherwise, if it is judged that the original set speed limit value is the low speed limit value, it means that the user wants to set the original set speed limit value to the low speed limit value, so the high speed limit value is set to The reset the high speed limit value and store it in the central controller 21 (S29) 'redisplay the high speed limit The speed on the meter status indication code (S30), and ends the mode switching speed (S31). Thereafter, if the user wants to reset the high speed limit value as the basis for the final speed limit, the user must turn the key to turn the main switch 28 to the off state (S32), and then re-rotate the main switch 28 ( S33) is turned on (S33), and the switch handle and the brake are operated. At this time, the central controller determines that the door opening degree of the electric door signal is (S34) and the brake signal is the braked state when the main switch is turned on. The start button is in the start state (S35), that is, the electric motor is controlled to rotate, and the speed limit value is used as the basis for riding the maximum speed limit (S36). Of course, in order to ensure the safety of riding, if the door opening of the electric door signal is not 〇 (S33), even if the brake signal is in the state of being braked and the 201223820 button is pressed (S37), the electric motor is not driven to rotate. This means that the electric motor car (S38) cannot be started. As can be seen from FIG. 4, the central controller of the present invention can complete the speed limit switching function by simply operating the original electric door handle and the brake on the electric motor vehicle. In addition, the central controller can also activate the button signal to replace the brake signal. That is to say, the gate signal and the start button signal can be used as a basis for judging whether or not to enter the speed limit switching, that is, when the central controller determines that the opening and closing button signal has been activated and the electronic opening of the door signal has reached more than half, then Lu enters the speed limit switching mode; otherwise, if it is judged that the start button signal is not activated or the gate signal of the door signal is less than half, the speed limit switching mode is not entered. In summary, when the user wants to start the electric motor vehicle, the electric door signal must be kept at zero at the same time, and the brake lever and the start button are activated, so that the motor vehicle can be prevented from being accidentally triggered due to a single key false trigger. Since the electric door handle is not activated as a necessary condition for starting the electric motor car, the electric motor car does not have an early warning when it is started, and the user can be prevented from being injured, and the user switches the speed limit value. At the same time, the triggering action of the brake car + dry and the illegal door handle must be performed, so that the single key false triggering is not caused, so the invention can indeed improve the defects of the conventional electric vehicle starting device and the speed limiting switching device. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial perspective view of a motor vehicle according to a preferred embodiment of the present invention. Circle 2: A schematic diagram of the speed limit switching device of the present invention. Figure 3 is a schematic diagram of the startup process of the present invention. 10 201223820 Figure 4 ··· This is the schematic diagram of the speed limit switching and starting process of the present invention. Figure 5: A partial exterior view of a conventional electric motor vehicle. Figure 6: Schematic diagram of the startup process for a conventional electric motor vehicle. 22 煞bar 24 start button 26 electric motor 28 main switch 52 main switch 54 煞 car bar [main component symbol description] 21 central controller 23 electric door handle 25 meter 27 power supply circuit 51 electric door handle 53 speed limit setting button 5 5 start button