Mitsubishi Eclipse. Technical Information Manual (1994) — part 61

DRIVE-CONTROL COMPONENTS Brakes

The brake system offers high dependability and

and brake sensitivity.

durability along with improved braking performance

FEATURES

1.

The

anti-lock brake system (4ABS) prevents skid-

ding that may result from locked wheels, thereby assuring
safe braking.

2. For some models,

type ventilated disc brakes

have been adopted for front wheels to provide more stable
braking and better braking feel.

3. For some models, a tandem brake booster has been

adopted which provides powerful braking with a light foot

pressure.

4.

For some models, drum-in-disc brakes have been adopted

for rear wheels. This type of brakes have built-in parking

brakes which provide outstanding braking stability.

Improved

serviceability

Higher safety

1.

For ease of inspection, a self-diagnosis capability has been

adopted for the 4ABS.

2. Both the front and rear brakes use a lug nut mounted

outer disc design for ease of removal and installation

3. The master cylinder reserve tank cap is white for easy

recognition

1. An audible wear indicator alerts the driver to the brake

pad limit.

2.

Proportioning valves prevent the rear wheels from locking

too quickly

3. Front and rear X brake lines.

CONSTRUCTION DIAGRAM

Service Brakes

SPECIFICATIONS

FWD

Items

Non-Turbo

Medium price

Except medium

price

Turbo

AWD

Master cylinder

Tandem type

Tandem type

Tandem type

Tandem type

(with level sensor)

(with level sensor)

(with level sensor)

(with level sensor)

I.D.

mm (in.)

23 8

23 8

23 8

25.4 (1)

Brake booster

Vacuum type

Vacuum type

Vacuum type

Vacuum type

Effective dia. of power

230 (9)

230 (9)

cylinder

mm (in.)

Boosting ratio

6.0,

6.0,

6.5,

6.5,

Proportioning valve

Dual type

Dual type

Dual type

Dual type

Decompression ratio

0.25

0.25

0.25

0.25

Front brakes

Floating caliper,

Floating caliper,

Floating caliper,

Floating caliper,

single-piston,

single-piston,

single-piston,

single-piston,

ventilated disc

ventilated disc

ventilated disc

ventilated disc

Disc effective dia.

mm (in.)

204 (8)

204 (8)

228 (9)

Wheel cylinder I.D.

60.3 (2

60.3 (2

60.3 (2

42.9 x 2

mm (in.)

(1

x 2)

Rear drum brakes

Leading-trailing

Drum I.D.

mm (in.)

203 (8)

Wheel cylinder I.D.

mm (in.)

20.6

Lining thickness

mm (in.)

4.4

Rear disc brakes

Floating caliper,*

Floating caliper,

Floating caliper,

Floating caliper,

single piston,

single piston,

single piston,

single piston,

solid disc

solid disc

solid disc

ventilated disc

Disc effective dia.

mm (in.)

222

222 (8.7)

222 (8.7)

237 (9.3)

Wheel cylinder I.D.

mm (in.)

34.9 (1

34.9 (1

34.9 (1

38.1 (1

ABS

Rotor teeth

Front

43

43

43

43

Rear

43

43

43

43

Speed sensor

Magnet coil type

Magnet coil type

Magnet coil type

Magnet coil type

NOTE Vehicles with ABS

DRIVE-CONTROL COMPONENTS Service Brakes

MASTER CYLINDER

Constructed to provide a maximum measure of safe-
ty, the master cylinder offers the following features.

l

A tandem type master cylinder.

l

On ABS equipped vehicles, a filter is provided
in the reserve tank to prevent foreign matter
from entering when adding or replacing brake
fluid.

<Vehicles without

l

The reserve tank cap is white for easy recogni-

tion which improves serviceability.

l

The master cylinder for the ABS equipped ve-

hicles incorporates a center valve to cope with

a high pressure that is generated when the ABS

is in operation.

<Vehicles with

Filter

Center valve

Brake booster comes in three types: 230 mm (9
in.), 180 205 mm (7 8 in.) and 205 230 mm
(8 9 in.) diameter ones. An appropriate one of

them is used to each model variation. The tandem
type boosters have two diaphragms each. The

mm (9 in.) Brake Booster>

Push
rod

205 mm (7 8 in.)

Tandem Brake Booster>

Front

diaphragm Rear diaphragm

rod

Booster

Reaction disc

spring

Atmospheric
chamber

Vacuum
chamber

diaphragm configuration can utilize a doubled pres-
sure difference between the vacuum and the atmo-
spheric pressure, so that a large boosting effect
can be obtained with a small outside diameter, there-
by contributing to size and weight reduction.

Push
rod

Booster

spring

230 mm (8 9 in.)

Tandem Brake Booster>

Front

Rear diaphragm

d i a p h r a g m

Operating

return

Vacuum
chamber

rod