Mitsubishi Outlander XL. Manual — part 1282

GENERAL

M23500000001USA0000010000

Brake systems with higher reliability and durability
have achieved distinguished braking performance.

FEATURES

IMPROVEMENT OF BRAKING PERFORMANCE

｠

The 10-inch single brake booster with the variable
boost ratio mechanism has been installed to assure
the maximum braking force with less pedal pressure
in case of emergency.

｠

In addition to the 10-inch single brake booster, the
small and long stroke-type master cylinder has
been adopted to achieve the downsizing and
secure the assist force.

｠

The installation of 16-inch ventilated disc brake on
the front axle and 16-inch solid disc brake on the
rear axle achieves the secure braking force and
direct braking feeling.

IMPROVEMENT IN SAFETY

｠

The 4-wheel anti-skid brake system (4ABS) has
been installed to prevent slippage resulting from the
wheel lock and assure stable vehicle posture and
driveability.

｠

Electronic control braking force distribution system
(EBD)

assures

maximum

braking

force

independent of the passenger's position in the
vehicle.

｠

X-type piping of brake lines have been adopted for
the front and rear wheels.

｠

Audible wear indicators are used on the front and
rear brake pads to warn the driver of the wear limit.

SERVICE QUALITY IMPROVEMENTS

｠

Diagnostic function has been adopted to ABS for
easier inspection.

｠

Brake fluid reservoir, master cylinder, and brake
booster have been integrated for downsizing and
better serviceability.

ZC6016900000

Brake booster

Master cylinder

Hydraulic unit

Front disc brake

Rear disc brake

Reserve tank

35A-2

BASIC BRAKE SYSTEM

GENERAL

SPECIFICATIONS

Item

Specifications

Master cylinder

Type

Tandem type

I.D. mm (in)

20.6 (0.81)

Brake booster

Type

Vacuum type, single

Effective dia. of power cylinder mm
(in)

254 (10.0)

Boosting ratio

6.5 (Pedal pressure: 60N)
8.5 (Pedal pressure: 140N)

Rear wheel hydraulic control method

Electronic

control

braking

force

distribution system (EBD)

Front brake

Type

Floating caliper 1 piston ventilated disc
(V6-S57)

Disc effective dia × thickness mm
(in)

294 × 26 (11.6 × 1.02)

Wheel cylinder I.D. mm (in)

57.2 (2.25)

Pad thickness mm (in)

10.0 (0.39)

Clearance adjustment

Automatic adjustment

Rear brake

Type

Floating caliper 1 piston solid disc (S6-
S38)

Disc effective dia × thickness mm
(in)

302 × 10 (11.9 × 0.39)

Wheel cylinder I.D. mm (in)

38.1 (1.50)

Pad thickness mm (in)

10.0 (0.39)

Clearance adjustment

Automatic adjustment

CONSTRUCTION DESCRIPTION

MASTER CYLINDER

M23500000010USA0000010000

ZC6018590000

Secondary piston assembly

Primary piston assembly

The master cylinder is a tandem type and is integrated
with the brake fluid reservoir with the level sensor.

BASIC BRAKE SYSTEM

35A-3

CONSTRUCTION DESCRIPTION

BRAKE BOOSTER

M23500000020USA0000010000

ZC6009900000

Diaphragm

Reaction disc

Operating rod

Push rod

Barometric pressure chamber

Booster return spring

10-inch single brake booster has been installed. The
variable boost ratio mechanism which increases the
brake booster gain has been adopted.

VARIABLE BOOST RATIO MECHANISM

The variable boost ratio mechanism changes the input/output
characteristics of the brake booster in two phases by changing
the reaction force applied to the valve plunger during the assist
phase.

AT INITIAL BRAKE ASSIST

ZC6009910000

Disc

Reaction
washer

Ring piston

1.

When the brake pedal is not depressed (no input load applied),
the reaction washer is not deformed.

2.

When the brake pedal is depressed, the reaction washer is
deformed to reach the ring piston and disc, then the first input
characteristics begin (Ratio 1).

35A-4

BASIC BRAKE SYSTEM

CONSTRUCTION DESCRIPTION

AT AN INCREMENT OF ASSIST RATIO

ZC600992 0000

Valve
piston

Spring
seat

Spring

Lock washer

1.

The reaction washer is further deformed and pushes down the
ring piston and lock washer, deflecting the spring. All the force
pushing the ring piston and disc is transferred to the brake
pedal via spring seat and disc as the reaction force.

ZC6009930000

Reaction
washer

Ring piston

Control
housing

Lock washer

2.

The reaction washer is then further deformed, and when the
lock washer makes contact with the control housing, the input
characteristics change. All the force applied from the reaction
washer to the ring piston is now transferred to the control
housing via the lock washer, so no force is applied to the brake
pedal. The second input characteristics (Ratio 2) begin.

BASIC BRAKE SYSTEM

35A-5

CONSTRUCTION DESCRIPTION