Brake system and brake control method

Patent metadata

Field	Value
Publication number	US-10625718-B2
Application number	US-201515320555-A
Country	US
Kind code	B2
Filing date	Jun 23, 2015
Priority date	Jun 24, 2014
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A brake system includes a service brake and a parking brake that brake a vehicle including a lift axle capable of ascending and descending. The brake system further includes a brake blocker device and a controller that controls the brake blocker device. The brake blocker device blocks at least one of supply of compressed air to the service brake and supply of compressed air to the parking brake. The service brake and the parking brake act on the lift axle. The controller actuates the brake blocker device when the lift axle is at a lifted position.

First claim

The invention claimed is:

1. A brake system comprising a service brake and a parking brake that are configured to brake a vehicle including a lift axle capable of ascending and descending, the brake system comprising:
a brake blocker device configured to block at least one of supply of compressed dry air to the service brake and supply of compressed dry air to the parking brake,
wherein the service brake and the parking brake are configured to act on the lift axle; and
an electronic controller electrically connected to an on-vehicle network, which forwards data of devices connected to each other, and is configured to electrically obtain operation information of the lift axle via the on-vehicle network and control application of electrical current to the brake blocker device,
wherein the operation information indicates whether the lift axle is at a lifted position,
wherein the electronic controller actuates the brake blocker device by applying the electrical current to the brake blocker device in response to determining that the lift axle is at the lifted position based on the operation information of the lift axle, and
wherein the electronic controller is arranged in any of an air dryer that dries compressed air to be supplied to the brake system, an electronic brake system, a traction control system, and an electric parking brake that controls the parking brake.

2. The brake system according to claim 1 , wherein the brake blocker device is a solenoid valve arranged in a supply passage through which compressed dry air is supplied to the service brake or the parking brake.

3. A brake control method for a brake system including a service brake and a parking brake that are configured to brake a vehicle including a lift axle capable of ascending and descending, wherein the brake system includes:
a brake blocker device configured to block at least one of supply of compressed dry air to the service brake and supply of compressed dry air to the parking brake, which operate the lift axle; and
an electronic controller configured to control application of electrical current to the brake blocker device, configured to be electrically connected to an on-vehicle network, which forwards data of devices connected to each other, and configured to be arranged in any of an air dryer that dries compressed air to be supplied to the brake system, an electronic brake system, a traction control system, and an electric parking brake that controls the parking brake, and
the brake control method comprising:
by the electronic controller, electrically obtaining operation information of the lift axle via the on-vehicle network, wherein the operation information indicates whether the lift axle is at a lifted position, and
by the electronic controller, actuating the brake blocker device by applying the electrical current to the brake blocker device in response to determining that the lift axle is located at the lifted position based on the operation information of the lift axle.

4. A brake system comprising a service brake and a parking brake that are configured to brake a vehicle including a lift axle capable of ascending and descending, the brake system comprising:
a brake blocker device configured to block at least one of supply of compressed dry air to the service brake and supply of compressed dry air to the parking brake, wherein the service brake and the parking brake are configured to act on the lift axle; and
an electronic controller configured to control application of electrical current to the brake blocker device and electrically connected to an on-vehicle network, which forwards data of devices connected to each other,
wherein the electronic controller is configured to:
electrically obtain operation information of the lift axle via the on-vehicle network, wherein the operation information indicates whether the lift axle is at a lifted position, and
in response to determining that the lift axle is at the lifted position based on the operation information of the lift axle, actuate the brake blocker device by applying the electrical current to the brake blocker device, and
wherein the electronic controller is arranged in any of an air dryer that dries compressed air to be supplied to the brake system, an electronic brake system, a traction control system, and an electric parking brake that controls the parking brake.

Assignees

• Nabtesco Automotive Corp

Inventors

• Minato Ichiro
• Hasebe Hiroki
• Yoketa Kazuya

Classifications

• B60T11/108

  to a trailer fluid system · CPC title

• B60T8/172

  Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters {(B60T8/17551 takes precedence)} · CPC title

• B60T17/004

  Draining and drying devices · CPC title

• B62D61/12

  with variable number of ground engaging wheels, e.g. with some wheels arranged higher than others, or with retractable wheels (for manoeuvring purposes only B60S) · CPC title

• B60T8/1708 Primary

  for lorries or tractor-trailer combinations · CPC title