E46 series BMW 3
since 1998 of release
Repair and car operation
E46 series BMW 3
+ BMW 3 Cars (Е46)
+ Current leaving and service
+ Systems of cooling, heating
+ Power supply systems, injection and release
+ engine Electric equipment
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
- Brake system
Removal and installation of brake shoes of forward wheels
Removal and installation directing a forward brake
Removal and installation of a brake disk of a forward wheel
Removal and installation of brake shoes of disk brakes
Removal and installation of a bracket of a brake of back wheels
Removal and installation of a brake disk of a back wheel
Measurement of thickness of a brake disk
Brake liquid - the main data and security measures
Air removal from brake system
Replacement of the brake pipeline
Replacement of a forward brake hose
Check of the amplifier of a brake
Removal and installation of blocks of the parking brake
Adjustment of the parking brake
Removal and installation of the lever of the parking brake
Removal and installation of a cable of a drive of the parking brake
Removal and installation of the switch of a stoplight
+ Suspension bracket and steering
+ Onboard electric equipment
+ electric equipment Schemes
The brake system consists of the main brake cylinder, the amplifier of a brake and disk brakes of lobbies and back wheels. The brake hydrosystem has two contours: one contour influences forward wheels, another on the back. Thanks to it at refusal of one of contours braking of the car is carried out by other contour. Pressure of liquid in brake system is created in the dual main brake cylinder by pressing a brake pedal.
The tank with brake liquid is located in an impellent compartment on the left side over the main brake cylinder. It provides with liquid all brake system. The amplifier of a brake at the block of cylinders accumulates a part of the vacuum created by the engine at absorption. Via the valve the effort of a pedal of a brake if necessary amplifies vacuum. As the diesel engine has not enough the vacuum created at absorption, the vacuum is created by the special vacuum pump located on a head of cylinders.
Disk brakes are equipped with supports with one cylinder.
The parking brake is actuated through hummock drafts and influences back wheels. As the disk brake is inefficient as lay, on back wheels there are in addition two drum-type brakes which have been built in brake disks. Drum-type brakes are put in action only via the lever of the parking brake.
Systems of stabilization of stability of the car on ABS/CBC/ASC Road + T/MSR/DSC
ABS: The anti-blocking system interferes with blocking of wheels at sharp braking of the car. Thanks to it even during braking the car remains operated.
Continuation of ABS is the braking monitoring system on turns of SVS (Cornering Brake Control). SVS on signals of four ABS sensors learns that the car moves on turn. If braking occurs on turn, it usually leads to that the car tries, as though to be screwed in turn. This effect is a consequence of increasing load of a forward axis. The braking monitoring system on turns of SVS regulates increase of brake effort in such a manner that it accrues quicker on external in relation to turn a forward wheel, than on other wheels. Thus, action, the return to the effect specified above is created. SVS works at turns practically as system of electronic distribution of effort. Thanks to it there is possible an impact on back wheels with big brake effort.
ASC (system of automatic stabilization) reduces a torque of both driving wheels by engine capacity reduction when wheels at dispersal of the car start to be turned.
In the presence of the effort monitoring system coupling (+Т) at a car troganiye from a place being turned wheels are braked. As a result of it the torque is switched to "being linked" wheels. The considered system practically operates as electronic blocked differential which is disconnected at speed over 40 km/h. ASC system use + in T is displayed to the driver by fire of a control lamp.
+ the T is integrated into ASC system system of regulation of the traction moment of MSR. This system interferes with blocking of driving wheels on the equal road at the expense of brake operation of the engine when switching on lower transfer or at gas reduction.
At car movement with snow chains in deep snow or at a troganiye from a place from deep dirt it is expedient to disconnect ASC system + T by means of the switch on the central console. At repeated turning on of the specified switch or at the following start of the engine ASC system + the T again automatically joins.
The system of dynamic control of stabilization of DSC is established as the additional equipment on model 328 i. The monitor of DSC system carries constantly out comparison of the current parameters of movement with the parameters of a perfect condition received by a settlement way. If, for example, the car at movement on turn it is too strong недоуправляется, the capacity of the car and, therefore, speed of movement decrease, at the same time the system brakes a back wheel, internal in relation to turn. Thanks to it the turned forward wheels create more lateral direction and the car does not leave turn.
Instructions on ABS/CBC/ASC systems + T/MSR/DSC
The safety scheme in the electronic control unit watches that in the presence of defect, for example, cable break, or at too low voltage of the storage battery (below 10 In) the system was disconnected. At normal work after ignition inclusion the control lamp lights up for short time and then dies away. If the lamp does not die away and in the course of movement continuously lights up, it indicates malfunction existence. The car can be maintained further, but the system of electronic regulation is disconnected.
If in the course of movement one or several control lamps on a control panel light up, pay attention to the following:
1 Stop the car for short time, switch off the engine and again start it.
2 Check tension of the storage battery. If it less than 10.5 In, charge the battery.
3 Check, whether plugs of the storage battery are tightened and whether there is a reliable contact.
4 Lift and establish the car on supports. Remove wheels, check external survey existence of damages of wires of sensors of number of turns of wheels (existence of retyrannies). More careful check of ABS/CBC/ASC system + should be carried out T/MSR/DSC by means of special devices. Address to the Section Diagnostics of malfunctions. Work it is desirable to lead HUNDRED in conditions.