Heavy vehicle brake control device and method thereof

A heavy vehicle brake control device, applied to a heavy vehicle pneumatic brake system including main parts having at least a brake valve, a front-axle air reservoir, a front-axle brake module, a rear-axle air reservoir and a rear-axle brake module, comprising:

• a first electro-pneumatic proportional valve control module;
• wherein a front-axle electrical brake loop of the heavy vehicle brake control device includes the front-axle air reservoir, the brake valve, the first electro-pneumatic proportional valve control module and the front-axle brake module;
• wherein the first electro-pneumatic proportional valve control module and the brake valve are connected between the front-axle air reservoir and the front-axle brake module, and the first electro-pneumatic proportional valve control module controls the front-axle electrical brake loop by the brake valve or the electro-pneumatic proportional valve of the first electro-pneumatic proportional valve control module;
• a secondary electro-pneumatic proportional valve control module;
• wherein a rear-axle electrical brake loop of the heavy vehicle brake control device includes the rear-axle air reservoir, the brake valve, the secondary electro-pneumatic proportional valve control module and the rear-axle brake module;
• wherein the secondary electro-pneumatic proportional valve control module and the brake valve are connected between the rear-axle air reservoir and the rear-axle brake module, and the secondary electro-pneumatic proportional valve control module controls the-rear-axle electrical brake loop by the brake valve or the electro-pneumatic proportional valve of the secondary electro-pneumatic proportional valve control module;
• a brake-pedal cable control module, connected with a brake pedal of the brake valve;
• and
• an electronic control unit, connected with the first electro-pneumatic proportional valve control module, the secondary electro-pneumatic proportional valve control module and the brake-pedal cable control module;
• wherein electronic control unit controls activation of the first electro-pneumatic proportional valve control module and the secondary electro-pneumatic proportional valve control module to perform braking along the front-axle electrical brake loop and the rear-axle electrical brake loop, respectively;
• wherein the electronic control unit judges a malfunction by detecting the first electro-pneumatic proportional valve control module and the secondary electro-pneumatic proportional valve control module, and determines whether the brake-pedal cable control module needs to be switched on to perform braking.