System for forbidding vehicle starting when vehicle door is not closed in place

Abstract

The invention relates to the technical field of starting systems, in particular to a system for forbidding vehicle starting when a vehicle door is not closed in place, a pedal circuit is connected with a door control circuit in series, the pedal circuit comprises an accelerator pedal control valve BH1 and a pedal lock control air cylinder UG1, and the pedal lock control air cylinder UG1 receives gas conveyed by the accelerator pedal control valve BH1 and locks the accelerator pedal control valve BH1. The accelerator pedal control valve BH1 is used for controlling the telescopic state of a piston rod of the pedal lock control air cylinder UG1. When the vehicle door is opened, a piston rod of the pedal lock control air cylinder UG1 is pushed out and abuts against the accelerator pedal ST, the accelerator pedal ST is locked, even if a driver steps on the accelerator pedal ST downwards at the moment, the accelerator pedal ST cannot be stepped down by the driver, it is guaranteed that the vehicle cannot be started when the vehicle door is opened, and passengers are prevented from falling off from the vehicle door to cause casualties after the vehicle is started; after the automobile door is completely closed, the piston rod of the pedal lock control air cylinder UG1 is retracted and does not abut against the accelerator pedal ST any more, the accelerator pedal ST is unlocked, and a driver can step on the accelerator pedal ST.

Description

Technical Field

[0001] The invention relates to the technical field of starting systems, and in particular to a system for prohibiting a vehicle from starting if a door is not fully closed. Background Art

[0002] A bus is a motor vehicle specially used for carrying passengers, and is widely used in public transportation, tourism, long-distance transportation and other fields. Buses can be divided into many types according to their purpose, passenger capacity and design features. According to their purpose, they can be divided into city buses, long-distance buses, tourist buses, school buses, commuter buses, etc.; according to passenger capacity, they can be divided into small buses, medium-sized buses, large buses, etc.; according to the power type, they can be divided into fuel buses, electric buses, hybrid buses, etc. Each bus is equipped with a pneumatic door for passengers to get on and off. The pneumatic door consists of several parts such as the air pressure system, cylinder, control switch, and anti-pinch device. The air pressure system provides power for the pneumatic door, which usually shares the air source with the vehicle's brake system. The air pressure system drives the cylinder through compressed air to control the opening and closing of the door. The cylinder is the core component of the pneumatic door. The door is opened and closed by the push of air pressure. The cylinder is usually installed on the upper or lower part of the door and connected to the door through a connecting rod. The driver operates the door through the control switch (button or handle) in the cab. During the door closing process, if the anti-pinch device detects an obstacle, the door will automatically stop or reopen to prevent passengers from being pinched. Pneumatic doors are easy to operate. The driver can easily operate the door through the control switch without manual operation. The opening and closing speed is fast, which is suitable for occasions with frequent opening and closing. Pneumatic doors have a simple structure, low maintenance cost and long service life.

[0003] However, traditional pneumatic doors are not equipped with a system to prohibit the vehicle from starting when they are closed. During the use of the bus, accidents caused by improper operation of the driver often occur. The vehicle doors have not been completely closed, and the bus has already started running, causing passengers standing near the doors to be thrown out of the bus, resulting in casualties. Summary of the invention

[0004] The main purpose of the present invention is to provide a system for prohibiting a vehicle from starting when the vehicle doors are not fully closed, so as to solve the problem in the related art that the vehicle doors have not been fully closed but the bus has already started running.

[0005] In order to achieve the above object, according to one aspect of the present invention, a system for prohibiting a vehicle from starting when a door is not fully closed is provided, comprising: a gate control circuit, the gate control circuit comprising a gate control cylinder UG2 and a gate control solenoid valve BH2, the gate control cylinder UG2 receiving gas delivered by the gate control solenoid valve BH2, the gate control solenoid valve BH2 being used to control the extension and retraction state of the piston rod of the gate control cylinder UG2; A pedal circuit, wherein the pedal circuit is connected in series with the gate control circuit, wherein the pedal circuit comprises an accelerator pedal control valve BH1 and a pedal lock control cylinder UG1, wherein the pedal lock control cylinder UG1 receives gas delivered by the accelerator pedal control valve BH1, and wherein the accelerator pedal control valve BH1 is used to control the extension and retraction state of the piston rod of the pedal lock control cylinder UG1; A feedback circuit is connected in parallel with the gate control circuit. The feedback circuit comprises an operational amplifier A, a transistor VT1 and a transistor VT2. The operational amplifier A, the transistor VT1 and the transistor VT2 are used to amplify the voltage signal.

[0006] Furthermore, the gate control circuit is connected to a DC24V or DC12V voltage.

[0007] Furthermore, the gate control circuit also includes a fuse FU, a rocker switch BR1, a door-closed switch BR2 and a signal light LED. The fuse FU is connected in series in the gate control circuit. When the current of the gate control circuit exceeds 5A, the fuse FU will automatically blow, cutting off the circuit to protect other components.

[0008] Furthermore, one end of the rocker switch BR1 is connected to the fuse FU, and the other end is connected to the gate-controlled solenoid valve BH2, for controlling the opening state of the gate-controlled solenoid valve BH2. The rocker switch BR1 is connected to both the door-closed switch BR2 and the accelerator pedal control valve BH1.

[0009] Furthermore, the door-closed-to-position switch BR2 is connected in series with the signal light LED and in parallel with the rocker switch BR1. The door-closed-to-position switch BR2 includes a normally closed point and a normally open point. The other end of the signal light LED is grounded. When the normally open point of the door-closed-to-position switch BR2 is connected, the signal light LED is off. When the normally closed point of the door-closed-to-position switch BR2 is connected, the signal light LED lights up.

[0010] Furthermore, the pedal circuit also includes an emergency valve CF, an air source processor DN and an air source AP. The air source AP is connected to the emergency valve CF via the air source processor DN. The air source processor DN is used to filter and pressure-regulate the gas.

[0011] Furthermore, the outlet end of the emergency valve CF is divided into two air paths, one air path is connected to the accelerator pedal control valve BH1, and the other air path is connected to the gate-controlled solenoid valve BH2. The emergency valve CF delivers gas to the pedal lock control cylinder UG1 through the accelerator pedal control valve BH1, and the emergency valve CF delivers gas to the gate-controlled cylinder UG2 through the gate-controlled solenoid valve BH2. The emergency valve CF is used to control the on / off or flow direction of the airflow.

[0012] Furthermore, the feedback circuit also includes a resistance component, an adjustment resistance component and a coupling capacitor component, the resistance component includes a resistor R1, a resistor R2 and a resistor R3, the adjustment resistance component includes a collector resistor RC1, a collector resistor RC2, an emitter resistor RE and a feedback resistor RF, and the coupling capacitor component includes a coupling capacitor C1 and a coupling capacitor C2.

[0013] Furthermore, resistor R1, resistor R2 and resistor R3, the resistor R1 and resistor R3 are connected in series, one end of the resistor R1 is connected to the output end of the operational amplifier A, and the other end is connected to the reverse input end of the operational amplifier A, one end of the resistor R3 is grounded, and the other end is connected to the reverse input end of the operational amplifier A, one end of the resistor R2 is grounded, and the other end is connected to the output end of the operational amplifier A, the positive input end of the operational amplifier A is connected to the DC power supply VCC, and the reverse input end is connected to the DC power supply VEE.

[0014] Furthermore, the emitter of the transistor VT1 is connected to the resistor R2, the collector of the transistor VT1 is connected to the base of the transistor VT2, the collector of the transistor VT1 is connected to the collector resistor RC1, the collector resistor RC1 is used to convert the change of the collector current of the transistor VT1 into a voltage change, the base of the transistor VT1 is connected to the resistor R2 through the coupling capacitor C1, the coupling capacitor C1 is used to isolate DC and pass AC, the emitter of the transistor VT2 is connected to the emitter resistor RE and the feedback resistor RF, the emitter resistor RE is grounded, the collector of the transistor VT2 is connected to the coupling capacitor C2 and the collector resistor RC2, the collector resistor RC2 is used to convert the change of the collector current of the transistor VT2 into a voltage change, the coupling capacitor C2 is used to isolate DC and pass AC, the coupling capacitor C2 is connected to the emitter resistor RE and is grounded.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the transistor VT1 amplifies the voltage signal again, and the amplified voltage signal is input to the transistor VT2 for amplification three times, and finally outputted through the coupling capacitor C2, the emitter resistor RE and the feedback resistor RF form a negative feedback network, and a part of the output signal is fed back to the gate control circuit, thereby increasing the input resistance, reducing the output resistance, widening the frequency band, and reducing the nonlinear distortion, thereby stabilizing the output voltage and improving the performance of the amplifier circuit; when the door is opened, the piston rod of the pedal lock control cylinder UG1 is pushed out to press against the accelerator pedal ST, and the accelerator pedal ST is locked, and even if the driver steps on the accelerator pedal ST downward at this time, the accelerator pedal ST cannot be stepped on by the driver, thereby ensuring that the car cannot be started when the door is opened, and preventing passengers from falling from the door after the car is started, causing casualties; after the door is completely closed, the piston rod of the pedal lock control cylinder UG1 is retracted, no longer pressing against the accelerator pedal ST, and the accelerator pedal ST is unlocked, and the driver steps on the accelerator pedal ST to refuel the bus engine, and the bus runs normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall circuit diagram of the present invention; Figure 2 This is the feedback circuit diagram of the present invention. DETAILED DESCRIPTION

[0017] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0018] See also Figure 1 and Figure 2 , this embodiment provides a system for prohibiting a vehicle from starting when a door is not fully closed, comprising: a gate control circuit, the gate control circuit comprising a gate control cylinder UG2 and a gate control solenoid valve BH2, the gate control cylinder UG2 receives gas delivered by the gate control solenoid valve BH2, and the gate control solenoid valve BH2 is used to control the extension and retraction state of the piston rod of the gate control cylinder UG2; The pedal circuit is connected in series with the gate control circuit. The pedal circuit includes an accelerator pedal control valve BH1 and a pedal lock control cylinder UG1. The pedal lock control cylinder UG1 receives gas delivered by the accelerator pedal control valve BH1. The accelerator pedal control valve BH1 is used to control the extension and retraction state of the piston rod of the pedal lock control cylinder UG1. The feedback circuit is connected in parallel with the gate control circuit. The feedback circuit includes an operational amplifier A. The operational amplifier A is used to amplify the voltage signal.

[0019] The gate control circuit is connected with a DC24V or DC12V voltage.

[0020] The gate control circuit also includes a fuse FU, a rocker switch BR1, a door-closed switch BR2 and a signal light LED. The fuse FU is connected in series in the gate control circuit. When the current of the gate control circuit exceeds 5A, the fuse FU will automatically blow, cutting off the circuit to protect other components.

[0021] One end of the rocker switch BR1 is connected to the fuse FU, and the other end is connected to the door-controlled solenoid valve BH2, which is used to control the opening state of the door-controlled solenoid valve BH2. The rocker switch BR1 is connected to both the door-closed switch BR2 and the accelerator pedal control valve BH1.

[0022] The door closing switch BR2 is connected in series with the signal light LED and in parallel with the rocker switch BR1. The door closing switch BR2 includes normally closed points 1 and 3 and normally open points 1 and 2. The other end of the signal light LED is grounded. When the normally open points 1 and 2 of the door closing switch BR2 are connected, the signal light LED goes out. When the normally closed points 1 and 3 of the door closing switch BR2 are connected, the signal light LED lights up.

[0023] The pedal circuit also includes an emergency valve CF, an air source processor DN and an air source AP. The air source AP is connected to the emergency valve CF through the air source processor DN. The air source processor DN is used to filter and pressure-regulate the gas.

[0024] The outlet end of the emergency valve CF is divided into two air paths, one of which is connected to the accelerator pedal control valve BH1, and the other is connected to the gate control solenoid valve BH2. The emergency valve CF delivers gas to the pedal lock control cylinder UG1 through the accelerator pedal control valve BH1, and the emergency valve CF delivers gas to the gate control cylinder UG2 through the gate control solenoid valve BH2. The emergency valve CF is used to control the on / off or flow direction of the airflow.

[0025] The feedback circuit also includes a resistor component, an adjustment resistor component and a coupling capacitor component. The resistor component includes resistors R1, R2 and R3. The adjustment resistor component includes collector resistors RC1, RC2, emitter resistors RE and feedback resistors RF. The coupling capacitor component includes coupling capacitors C1 and C2.

[0026] Resistors R1, R2 and R3, resistors R1 and R3 are connected in series, one end of resistor R1 is connected to the output end of operational amplifier A, and the other end is connected to the reverse input end of operational amplifier A, one end of resistor R3 is grounded, and the other end is connected to the reverse input end of operational amplifier A, one end of resistor R2 is grounded, and the other end is connected to the output end of operational amplifier A, the positive input end of operational amplifier A is connected to the DC power supply VCC, and the reverse input end is connected to the DC power supply VEE.

[0027] The emitter of the transistor VT1 is connected to the resistor R2, the collector of the transistor VT1 is connected to the base of the transistor VT2, the collector of the transistor VT1 is connected to the collector resistor RC1, the collector resistor RC1 is used to convert the change of the collector current of the transistor VT1 into a voltage change, the base of the transistor VT1 is connected to the resistor R2 through the coupling capacitor C1, the coupling capacitor C1 is used to block the DC and pass the AC, the emitter of the transistor VT2 is connected to the emitter resistor RE and the feedback resistor RF, the emitter resistor RE is grounded, the collector of the transistor VT2 is connected to the coupling capacitor C2 and the collector resistor RC2, the collector resistor RC2 is used to convert the change of the collector current of the transistor VT2 into a voltage change, the coupling capacitor C2 is used to block the DC and pass the AC, the coupling capacitor C2 is connected to the emitter resistor RE and grounded, the coupling capacitor C1 and the coupling capacitor C2 have the same function, so that the DC operating points of the transistors VT1 and VT2 are independent of each other, and the AC signal can pass smoothly.

[0028] The DC power supply supplies power to the operational amplifier A to ensure that the operational amplifier A can work normally. When the car door squeezes the door-closed switch BR2, the voltage at the normally closed points 1, 3 and the normally open points 1, 2 is unstable at the moment of switching, which can easily cause the door-closed switch BR2 to output an error signal to the accelerator pedal control valve BH1. After the signal is amplified by the operational amplifier A, the possibility of the door-closed switch BR2 outputting an error signal to the accelerator pedal control valve BH1 is reduced.

[0029] The voltage signal amplified by the operational amplifier A is input to the transistor VT1 through the coupling capacitor C1. The transistor VT1 amplifies the voltage signal again. The amplified voltage signal is then input to the transistor VT2 for three-times amplification and finally output through the coupling capacitor C2. The emitter resistor RE and the feedback resistor RF form a negative feedback network, which feeds back part of the output signal to the gate circuit, increases the input resistance, reduces the output resistance, widens the bandwidth, reduces nonlinear distortion, and stabilizes the output voltage and improves the performance of the amplifier circuit.

[0030] The accelerator pedal control valve BH1 and the gate control solenoid valve BH2 both use two-position five-way solenoid valves, which can control the gas to flow out through different outlets, so that the cylinder connected to it can make corresponding movements and the piston rod can be extended or retracted.

[0031] When no external force is applied, the normally closed points 1 and 3 of the door closing position switch BR2 are connected, and the normally open points 1 and 2 are disconnected.

[0032] The driver presses the rocker switch BR1, and the rocker switch BR1 controls the door control solenoid valve BH2 to operate, so that the air source AP flows into the piston rodless cavity of the door control cylinder UG2 through a channel of the door control solenoid valve BH2, and the piston rod of the door control cylinder UG2 extends to push the door open. At the same time, the rocker switch BR1 transmits the door opening signal to the accelerator pedal control valve BH1, and a channel of the accelerator pedal control valve BH1 is opened, and the air source AP flows into the piston rodless cavity of the pedal lock control cylinder UG1 through the opened channel in the accelerator pedal control valve BH1, and the piston rod of the pedal lock control cylinder UG1 is pushed out to support the accelerator pedal ST, and the accelerator pedal ST is locked. Even if the driver steps on the accelerator pedal ST at this time, the accelerator pedal ST cannot be stepped on by the driver, ensuring that the car cannot be started when the door is opened, preventing passengers from falling from the door after the car starts, causing casualties.

[0033] The driver presses the rocker switch BR1 again, and the rocker switch BR1 controls the door control solenoid valve BH2 to operate, so that the air source AP flows into the piston rod cavity of the door control cylinder UG2 through another channel of the door control solenoid valve BH2, and the piston rod of the door control cylinder UG2 retracts, driving the door to close. When the door is completely closed, the door squeezes the door closing switch BR2, so that the normally closed points 1 and 3 of the door closing switch BR2 are disconnected and the normally open points 1 and 2 are connected, and the other channel of the accelerator pedal control valve BH1 is opened, and the air source AP flows into the piston rod cavity of the pedal lock control cylinder UG1 through the opened channel in the accelerator pedal control valve BH1, and the piston rod of the pedal lock control cylinder UG1 is retracted and no longer presses against the accelerator pedal ST, so that the accelerator pedal ST is unlocked, and the driver presses the accelerator pedal ST to refuel the bus engine, and the bus runs normally.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A system for prohibiting a vehicle from starting when a door is not fully closed, characterized in that: include: A gate control circuit, wherein the gate control circuit comprises a gate control cylinder UG2 and a gate control solenoid valve BH2, wherein the gate control cylinder UG2 receives gas delivered by the gate control solenoid valve BH2, and the gate control solenoid valve BH2 is used to control the extension and retraction state of the piston rod of the gate control cylinder UG2; A pedal circuit, wherein the pedal circuit is connected in series with the gate control circuit, wherein the pedal circuit comprises an accelerator pedal control valve BH1 and a pedal lock control cylinder UG1, wherein the pedal lock control cylinder UG1 receives gas delivered by the accelerator pedal control valve BH1, and wherein the accelerator pedal control valve BH1 is used to control the extension and retraction state of the piston rod of the pedal lock control cylinder UG1; A feedback circuit is connected in parallel with the gate control circuit. The feedback circuit comprises an operational amplifier A, a transistor VT1 and a transistor VT2. The operational amplifier A, the transistor VT1 and the transistor VT2 are used to amplify the voltage signal.

2. The system for prohibiting vehicle starting when the vehicle door is not fully closed according to claim 1, characterized in that: The gate control circuit is connected to a DC24V or DC12V voltage.

3. The system for prohibiting vehicle starting when the vehicle door is not fully closed according to claim 1, characterized in that: The gate control circuit also includes a fuse FU, a rocker switch BR1, a door-closed switch BR2 and a signal light LED. The fuse FU is connected in series in the gate control circuit. When the current of the gate control circuit exceeds 5A, the fuse FU will automatically blow, cutting off the circuit to protect other components.

4. The system for prohibiting vehicle starting when the vehicle door is not fully closed according to claim 3, characterized in that: One end of the rocker switch BR1 is connected to the fuse FU, and the other end is connected to the door-controlled solenoid valve BH2, for controlling the opening state of the door-controlled solenoid valve BH2. The rocker switch BR1 is connected to both the door-closed switch BR2 and the accelerator pedal control valve BH1.

5. The system for prohibiting vehicle starting when the vehicle door is not fully closed according to claim 3, characterized in that: The door-closed-to-position switch BR2 is connected in series with the signal light LED and in parallel with the rocker switch BR1. The door-closed-to-position switch BR2 comprises a normally closed point (1, 3) and a normally open point (1, 2). The other end of the signal light LED is grounded. When the normally open point (1, 2) of the door-closed-to-position switch BR2 is connected, the signal light LED is off. When the normally closed point (1, 3) of the door-closed-to-position switch BR2 is connected, the signal light LED is illuminated.

6. The system for prohibiting vehicle starting when the vehicle door is not fully closed according to claim 3, characterized in that: The pedal circuit also includes an emergency valve CF, an air source processor DN and an air source AP. The air source AP is connected to the emergency valve CF via the air source processor DN. The air source processor DN is used to filter and pressure-regulate the gas.

7. The system for prohibiting vehicle starting when the vehicle door is not fully closed according to claim 6, characterized in that: The outlet end of the emergency valve CF is divided into two air paths, one of which is connected to the accelerator pedal control valve BH1, and the other is connected to the gate-controlled solenoid valve BH2. The emergency valve CF delivers gas to the pedal lock control cylinder UG1 through the accelerator pedal control valve BH1, and the emergency valve CF delivers gas to the gate-controlled cylinder UG2 through the gate-controlled solenoid valve BH2. The emergency valve CF is used to control the on / off or flow direction of the airflow.

8. The system for prohibiting vehicle starting when the vehicle door is not fully closed according to claim 6, characterized in that: The feedback circuit also includes a resistor component, an adjustment resistor component and a coupling capacitor component. The resistor component includes resistors R1, R2 and R3. The adjustment resistor component includes collector resistors RC1, RC2, emitter resistors RE and feedback resistors RF. The coupling capacitor component includes coupling capacitors C1 and C2.

9. The system for prohibiting vehicle starting when the vehicle door is not fully closed according to claim 8, characterized in that: The resistor R1 is connected in series with the resistor R3, one end of the resistor R1 is connected to the output end of the operational amplifier A, and the other end is connected to the reverse input end of the operational amplifier A, one end of the resistor R3 is grounded, and the other end is connected to the reverse input end of the operational amplifier A, one end of the resistor R2 is grounded, and the other end is connected to the output end of the operational amplifier A, the positive input end of the operational amplifier A is connected to the DC power supply VCC, and the reverse input end is connected to the DC power supply VEE.

10. The system for prohibiting vehicle starting when the vehicle door is not fully closed according to claim 8, characterized in that: The emitter of the transistor VT1 is connected to the resistor R2, the collector of the transistor VT1 is connected to the base of the transistor VT2, the collector of the transistor VT1 is connected to the collector resistor RC1, the collector resistor RC1 is used to convert the change of the collector current of the transistor VT1 into a voltage change, the base of the transistor VT1 is connected to the resistor R2 through the coupling capacitor C1, the coupling capacitor C1 is used to block direct current and pass alternating current, the emitter of the transistor VT2 is connected to the emitter resistor RE and the feedback resistor RF, the emitter resistor RE is grounded, the collector of the transistor VT2 is connected to the coupling capacitor C2 and the collector resistor RC2, the collector resistor RC2 is used to convert the change of the collector current of the transistor VT2 into a voltage change, the coupling capacitor C2 is used to block direct current and pass alternating current, the coupling capacitor C2 is connected to the emitter resistor RE and is grounded.

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