New energy heavy-duty truck transmission actuator and self-learning operation method

Table of contents

1、Actuator

2、Self-learning operation

1、 Actuator:

Operating Voltage: 12/24V,

Operating Air Pressure: 7-10 Bar,

Operating Temperature: -30-120°C.

The transmission's six gear selections and shifts can be accomplished through electro-pneumatic control. The Transmission Controller (TCU) controls the opening and closing of corresponding pins on solenoid valve 1, thereby enabling forward and backward movement of shift knob 1. Position sensor 1 provides feedback to the TCU, forming a closed-loop control loop for shifting. Similarly, the TCU controls the corresponding movement of shift knobs 2 and 3, thereby engaging gears.

Shift Control Schematic Diagram: Energizing pins 1/2 activates the left solenoid valve, which opens the left air intake.

Energizing pins 3/4 activates the right solenoid valve, which opens the right air intake.

When the left solenoid valve is energized,

the air intake opens, air enters the left cylinder, and the piston moves the shift knob to the right, engaging a gear.

Energizing the right solenoid valve opens the air intake,

air enters the right cylinder, and the piston moves the shift knob to the left, engaging a gear.

The left and right solenoid valves are energized simultaneously

both cylinders are simultaneously inflated, the piston is in the middle position, and the shifter is in neutral.

2、Self-learning operation

The transmission can manually activate ramp self-learning and transmission gear self-learning.

2.1 Hill self-learning: Slope zeroing, quickly move the shift handle N/R back and forth 3 times within 5 seconds;

   Self-learning conditions: the vehicle is on a level road, the vehicle is ready, in neutral, the parking brake is applied and the foot brake is released, the vehicle is stationary, and there is no throttle;

   After learning is completed, turn off the key and power on for 3 seconds;

2.2 Transmission gear self-learning:

    Quickly move the handle, N/R back and forth 5 times within 10 seconds;

    Self-learning conditions: the vehicle is ready, the parking brake is applied, in neutral, there is no throttle, and no brakes are applied;

   After learning is completed, turn off the key and power on for 3 seconds;

Note: If the TCU controller, transmission, sensors, solenoid valves, and various actuators are replaced in the vehicle, transmission self-learning must be performed. If the transmission is moved on the vehicle frame or the TCU has been disassembled and assembled, hill self-learning must be performed at the same time.