BENDIX M-21-M-22 ANTILOCK MOD ASSY Manual de servicio descargar pdf (Pagina 19)

Antilock Re-Apply

If the antilock controller senses that wheel speed has increased sufficiently to require

re-application of braking pressure, it de-energizes the supply and exhaust solenoids.

With both solenoids de-energized, the modulator valve re-applies air to the brakes in

the same manner it did during a Non-Antilock Application.

E-16 Antilock Electronic Control Unit

General Description

The EC-16 is an electronic antilock controller. It is the base component in the full-

vehicle control antilock system for Ottawa tractors. In addition to the antilock function,

the EC-16 can be assembled and programmed to provide an optional traction control

feature. Figure shows the basic EC-16 configuration.

Designed to minimize the potential of brake lock-up on all wheels during aggressive

braking, the EC-16 based antilock system provides the vehicle with a high degree of

stability and steerability during braking. In most cases, vehicle stopping distance is

also reduced. The antilock portion of the EC-16-based system minimizes wheel skid

during hard or aggressive braking. By controlling wheel skid at all wheels on the vehi-

cle, optimum steering control and stopping distance is obtained.

The E-16 contains a self-configuring or learning feature that allows the EC-16 to be

configured by Ottawa when installed on the tractor. Because of this feature, the EC-16

controllers contains all the features and options available, and will activate the specific

features required for the tractor that it is installed on. It can be installed only on trac-

tors with antilock or the traction control features. The procedure for activating the self-

configuring feature is contained in the section entitled “Configuring the E-16.”

In order to provide full-vehicle wheel control antilock, the E-16 is used in combination

with the following components:

Four wheel speed sensors

Four air pressure modulator valves

One dash-mounted antilock condition lamp

One service brake relay valve

When programmed to provide traction control in addition to antilock, the following

components are added:

One traction solenoid (incorporated into the relay valve)

Two additional wheel speed sensors (optional for tandem drive vehicles with

differential braking feature)

One dash-mounted traction condition lamp

Serial connection to engine control module (for vehicles programmable for

torque limiting feature)

Traction disable wiring and switch

Air Brake System

Revised 11/15/99

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BENDIX M-21-M-22 ANTILOCK MOD ASSY Manual de servicio Pagina 19