A heavy truck multi-mode remote throttle control method

Abstract

The application discloses a heavy truck multi-mode remote throttle control method, which outputs a high level to an upper controller BBM through one or more remote control modes of a knob type PTO control mode, a zipper type PTO control mode, a steering wheel SET+ / - control mode, a CAN bus control mode and a one-key speed setting control mode, the BBM detects whether a hand brake is pulled and whether a rotating speed is at an idle speed through a message on a PCAN, the BBM activates a speed setting mode and sends a speed setting request to an engine through the PCAN. The application can meet the demand of different functions of vehicle models on the control mode of the remote throttle, improves the diversity of the rotating speed control of the heavy truck, and is of great significance especially on the vehicle models with high requirements on the remote throttle, such as fire engines, pump trucks and sanitation vehicles.

Description

Technical Field

[0001] This invention relates to the field of heavy-duty vehicle control, and more specifically to a multi-mode remote throttle control method for heavy-duty vehicles. Background Technology

[0002] The demand for remote throttle control modes in heavy-duty vehicles is increasing. Traditional PTO knob and PTO cable control methods are no longer sufficient. Different types of vehicles have different requirements for remote throttle control modes. For example, oilfield trucks are accustomed to using steering wheel buttons in the cab to adjust the speed, fire trucks are accustomed to using PTO knobs to adjust the speed, pump trucks are accustomed to using CAN messages to adjust the speed, and some special-purpose vehicles are accustomed to using one-button speed control. As a result, a multi-mode remote throttle control strategy is needed to meet the remote throttle control needs of different vehicle types. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-mode remote throttle control method for heavy-duty vehicles, which can select one or more remote control modes of the throttle according to actual needs.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] A multi-mode remote throttle control method for heavy-duty vehicles outputs a high-level signal to the superstructure controller BBM through one or more remote control modes. The BBM detects whether the vehicle's handbrake is engaged and whether the engine speed is idling by detecting messages connected to the PCAN. The BBM activates the speed adjustment mode and sends a speed adjustment request to the engine through the PCAN.

[0006] Remote control modes include: rotary PTO control mode controlled by a knob, zipper PTO control mode controlled by pulling a zipper, steering wheel SET± control mode controlled by steering wheel buttons, CAN bus control mode controlled by setting CAN information, and one-button cruise control mode controlled by a one-button cruise switch.

[0007] Furthermore, in the rotary PTO control mode, a 24V high-level signal is output from the power take-off (PTO) of the gearbox, the request switch of the PTO on the first shaft, or the enable switch of the hand throttle knob to the superstructure controller BBM. The high-level receiving pin of the PTO is ST3.9, the receiving pin of the PTO on the first shaft is ST3.6, and the high-level receiving pin of the hand throttle knob is ST4.14.

[0008] The specific circuit implementation is as follows: the hand throttle knob controls the rotation between 2-a and 2-b. Point 2-a is connected between the internal circuit resistor R1 and the sliding resistor Rw. Point 2-b is connected to the sliding end and signal end of Rw. The sliding end slides between 2-a and the point between Rw and resistor R2. Capacitor C is connected to the ground and the signal end respectively. When 2-b slides to 2-a, Rw and R2 are connected in series and then in parallel with capacitor C. When 2-b slides to the point between Rw and R2, R2 is connected in parallel with capacitor C.

[0009] Furthermore, the zipper-type PTO control mode generates tension by pulling the zipper, causing the zipper to rotate, and controls the output high-level voltage through changes in internal resistance.

[0010] Furthermore, the steering wheel SET± control mode sends a 24V high level to ST1.10 of the superstructure controller BBM via the enable switch on the steering wheel to activate the speed regulation mode. The + button on the steering wheel is connected to ST1.4 of the BMM via a hard wire, and the - button on the steering wheel is connected to ST1.5 of the BMM via a hard wire. When pressed, it sends a 24V voltage to the BBM. After receiving the voltage signal, the BBM sends a speed request to the engine via P-CAN to control the increase and decrease of the engine speed.

[0011] Furthermore, the CAN bus control mode is as follows: the superstructure connects to the BBM's CCAN, with pins ST1.7 or ST1.8. The superstructure customer controls the engine speed to the required value through customized CUS1 information.

[0012] Specifically, the mode for controlling engine speed is as follows: first, set the first two bits of the first byte of CUS1 (Overridecontrol mode) to 1, and then set the required speed in the second and third bytes.

[0013] Furthermore, the one-button speed control mode is as follows: first press the power take-off (PTO) request switch of the gearbox rear PTO or the first shaft PTO, then press the one-button speed control switch to output a 24V high-level voltage to pin ST4.13 of the BBM.

[0014] Furthermore, when any remote control mode is activated, the remote throttle controller activates and sends the TSC1_FD message to request the engine to adjust the speed; when all remote control modes are deactivated, the remote throttle controller stops sending the TSC1_FD message.

[0015] The advantages of this invention are: five remote throttle control modes can coexist on a single vehicle, can be used individually, or can be combined according to the actual needs of the superstructure. This control strategy provides multiple control modes for remotely controlling engine speed, greatly improving the diversity of speed control in heavy-duty vehicles, which is particularly significant for vehicles such as fire trucks, pump trucks, and sanitation vehicles that have high requirements for remote throttle control. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the control method of the present invention;

[0017] Figure 2 The electrical schematic diagram of the BBM of this invention;

[0018] Figure 3 This is the circuit diagram of the hand throttle knob of the present invention;

[0019] Figure 4 This is a graph showing the relationship between the PTO zipper angle and voltage in this invention;

[0020] Figure 5 This is a diagram showing the relationship between the PTO zipper angle and tension of the present invention.

[0021] Specific implementation mode

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] This embodiment discloses a multi-mode remote throttle control method for heavy-duty vehicles, which includes five modes for controlling engine speed. Please refer to... Figure 1 This includes: a rotary PTO control mode controlled by a knob, a zipper PTO control mode controlled by pulling a zipper, a steering wheel SET± control mode controlled by steering wheel buttons, a CAN bus control mode controlled by setting CAN information, and a one-touch cruise control mode controlled by a one-touch cruise switch.

[0024] (1) Rotary PTO control mode: The user of the superstructure needs to press the request switch for the rear PTO or the broken axle (first axle) PTO, or the enable switch for the hand throttle knob, with the handbrake engaged and the engine running. At this time, the switch outputs a 24V high level to the superstructure controller BBM. The high level receiving pin for the rear PTO is ST3.9, the receiving pin for the first axle PTO is ST3.6, and the high level receiving pin for the hand throttle knob is ST4.14. Please refer to the specific electrical control connection diagram. Figure 2Upon receiving a 24V high-level signal, the BBM checks whether the vehicle's handbrake is engaged and whether the engine speed is idling via messages connected to the PCAN (pins ST1.1 / ST1.2). If both the handbrake and engine speed meet the requirements, the BBM activates the speed control mode and sends a speed control request to the engine via the PCAN. At this time, the engine responds to the speed control mode, and the foot throttle is disabled. The operator can adjust the engine speed by rotating the hand throttle knob from outside the vehicle. The effective voltage of the PTO knob is within the range of 0.42V±0.1V to 4.58V±0.1V. The knob has an internal resistive structure. Please refer to the specific circuit diagram. Figure 3 The power supply terminal is 1, the signal terminal is 2, and the ground terminal is 3. A resistor R1 (200Ω) and a sliding rheostat Rw (2kΩ) are connected in series between terminals 1 and 2. A resistor R2 (200Ω) and a capacitor C (0.1μF) are connected in parallel between terminals 2 and 3. The signal terminal 2 is connected to 2-b. The size of the part connected in parallel with capacitor C can be controlled by sliding the slider on Rw, which can slide as far as 2-a, which is connected between R1 and Rw. By rotating the knob to different resistor positions, different output voltages are controlled, corresponding to speeds of 550-2150 rpm.

[0025] Pull-lock PTO Control Mode: The control logic of the pull-lock control mode is the same as that of the PTO knob, the difference lies in the specific operation. The pull-lock PTO generates tension by pulling the pull zipper. Please refer to [link / reference]. Figure 5 The rotation angle of the zipper varies depending on the tension applied. Please refer to [the provided text for details on the rotation angle of the zipper]. Figure 4 The output voltage is controlled by changes in internal resistance.

[0026] Steering wheel SET± control mode: With the handbrake engaged, the customer must first press the Set+ / - speed control enable switch. Then, by jogging or pressing and holding the Set+ / - button on the steering wheel, the engine speed can be adjusted. The speed control enable switch is the MEM button on the steering wheel. When pressed, it sends a 24V high-level signal to ST1.10 of the BBM controller. Upon receiving the 24V high-level signal, the BBM checks whether the handbrake is engaged and whether the engine speed is idling via messages connected to the PCAN (pins ST1.1 / ST1.2). If both the handbrake and engine speed meet the requirements, the BBM activates the speed control mode and sends a speed control request to the engine via PCAN. At this time, the engine responds to the speed control mode, and the accelerator pedal is disabled. The + button on the steering wheel is hardwired to ST1.4 of the BMM, and the - button is hardwired to ST1.5 of the BMM. When pressed, it sends a 24V voltage to the BBM. After receiving the voltage signal, the BBM sends a 24V voltage to the BBM via PCAN. Send a speed request to the engine. Then press the "+" and "-" buttons on the steering wheel to control the increase and decrease of the engine speed. The speed adjustment step size for long press is calibrable: 100 rpm or 150 rpm, with 150 rpm as the default.

[0027] CAN bus control mode: The upper part needs to be connected to the BBM's CCAN, with pins ST1.7 / ST1.8. The upper part customer can control the engine speed to the required value through the custom CUS1 (message ID: 0x0CEFFD55) information: first set the first byte 1-2 of CUS1 to Override control mode to 1, and then set the required speed in bytes 2-3.

[0028] One-key speed control mode: With the handbrake engaged, the customer must first press the power take-off (PTO) request switch for the rear transmission or broken shaft (first shaft) PTO, and then press the one-key speed control switch to directly reach the set value of the engine speed. After pressing the switch, the switch outputs 24V voltage to BBM's ST4.13. After BBM detects that the handbrake and speed meet the requirements, it requests the engine speed. This value can be set through the EOL tool.

[0029] When none of the above speed control modes are activated, the remote throttle controller will not send a TSC1_FD message to request engine speed adjustment. When any one or more of the following speed control functions are activated: SET+ / - speed control, CAN information speed control, one-button cruise control, manual throttle knob speed control, or manual throttle lock speed control, the remote throttle controller will activate and send a TSC1_FD message to request engine speed adjustment. When all of the above speed control modes are deactivated, the remote throttle controller will stop sending TSC1_FD messages.

[0030] These five remote throttle control methods can coexist on one vehicle, or be used individually, or different control methods can be combined according to the actual needs of the superstructure.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-mode remote throttle control method for heavy-duty vehicles, characterized in that, The system outputs a high level to the upper-body controller BBM through one or more remote control modes. The BBM detects whether the vehicle's handbrake is engaged and whether the engine speed is idling by using messages connected to P_CAN. When it detects that the vehicle's handbrake is engaged and the engine speed is idling, the BBM activates the speed regulation mode. After BBM activates the speed control mode, it sends a speed control request to the engine via P_CAN, and at the same time activates the remote throttle controller to send TSC1_FD information to request the engine to adjust the speed. When all remote control modes are deactivated, the remote throttle controller stops sending TSC1_FD information; The remote control modes include: a rotary PTO control mode controlled by a knob, a zipper PTO control mode controlled by pulling a zipper, a steering wheel SET± control mode controlled by steering wheel buttons, a CAN bus control mode controlled by setting CAN information, and a one-button cruise control mode controlled by a one-button cruise switch. The rotary PTO control mode outputs a 24V high-level signal to the superstructure controller BBM via the request switch of the rear power take-off unit of the gearbox, the power take-off unit of the first shaft, or the enable switch of the hand throttle knob. The high-level receiving pin of the rear power take-off unit of the gearbox is ST3.9, the receiving pin of the power take-off unit of the first shaft is ST3.6, and the high-level receiving pin of the hand throttle knob is ST4.

14. The hand throttle knob is a control knob that rotates between 2-a and 2-b. Point 2-a is connected between the internal circuit resistor R1 and the sliding resistor Rw. Point 2-b is connected to the sliding end and the signal end of Rw. The sliding end slides between 2-a and the point between Rw and resistor R2. Capacitor C is connected to the ground and the signal end respectively. When 2-b slides to 2-a, Rw and R2 are connected in series and then in parallel with capacitor C. When 2-b slides to the point between Rw and R2, R2 is connected in parallel with capacitor C.

2. The multi-mode remote throttle control method for heavy-duty vehicles according to claim 1, characterized in that, The zipper-type PTO control mode generates tension by pulling the zipper, causing it to rotate, and controls the output high-level voltage through changes in internal resistance.

3. The multi-mode remote throttle control method for heavy-duty vehicles according to claim 1, characterized in that, The steering wheel SET± control mode sends a 24V high level to ST1.10 of the superstructure controller BBM via the enable switch on the steering wheel to activate the speed regulation mode. The + button on the steering wheel is connected to ST1.4 of the BMM via a hard wire, and the - button on the steering wheel is connected to ST1.5 of the BMM via a hard wire. When pressed, it sends a 24V voltage to the BBM. After receiving the voltage signal, the BBM sends a speed request to the engine via P_CAN to control the increase and decrease of the engine speed.

4. The multi-mode remote throttle control method for heavy-duty vehicles according to claim 1, characterized in that, The CAN bus control mode is as follows: the upper part connects to the BBM's C_CAN, with pins ST1.7 or ST1.

8. The upper part customer controls the engine speed to the required value through customized CUS1 information.

5. The multi-mode remote throttle control method for heavy-duty vehicles according to claim 1, characterized in that, The one-key speed control mode is as follows: first press the request switch for the rear power take-off unit or the first shaft power take-off unit of the gearbox, and then press the one-key speed control switch to output a high-level voltage of 24V to pin ST4.13 of the BBM.

6. The multi-mode remote throttle control method for heavy-duty vehicles according to claim 1, characterized in that, When any remote control mode is activated, the remote throttle controller activates and sends the TSC1_FD message to request the engine to adjust the speed; when all remote control modes are deactivated, the remote throttle controller stops sending the TSC1_FD message.

Images