SAFARI

4 DLT ENGINE

ELECTRICALLYOPERATEDAUTOMATIC

KSB:

Refer Fig.160.

(Wherever Fitted)

Control device is ON.

The pump has got an automatic KSB (cold start

accelerator) operated by a 12V power supply. The

control device (1) Contains a wax module which is

connected to the KSB control lever (2) Through a

cable (3) When the engine is running, the control

device draws current from battery through the stop

solenoid (4) The current drawn from the battery is

used to heat the wax module and the expanded wax

releases the KSB control lever (which is held against

a torsion spring) towards the ‘ZERO’ position of the

injection advance unit plunger through the connecting

cable (3). In this position, the KSB control lever rests

against a stop plate (5) Fitted with pump housing.

When the current supply is cut OFF to the actuating

unit, the wax solidifies and the KSB control lever is

pulled back to the advanced position (max. 2.5 deg.

cam angle). This ensures automatic timing advance

during engine start. It is to be noted that during engine

running the power supply to the KSB control device

is on.

Setting static timing on the engine fitted with

KSB unit.

After fitting the pump loose on the engine a 12V

power supply to be connected to the KSB control

device to ensure that the KSB control lever rests

against the KSB stop plate. (This takes 3 to 4

minutes after giving supply.) This corresponds to

the fully retarded position of the advance unit plunger.

At this position, the specified lift of pumping plunger

to be set at TDC of the engine and the pump is

tightened.

Temperature controlled idle speed increase

(TLA):

Above pump has also got the feature TLA. The TLA

is likewise actuated by the control device (1) and is

an advisable addition to the automatic KSB. For this

purpose, the KSB control lever (2) is extended and

a ball pin (6) is fitted. When the engine is started in

cold, this ball pin presses against the speed control

lever and lifts it off the idle stop screw (7).

The idle speed is thus increased and engine warm

up is improved. By the time the engine is warm, the

KSB control lever is against the KSB stop plate.

Consequently, the speed control lever also rests

against the idle stop screw ensuring normal idling

and the temperature controlled idle speed increase

is no longer operative.

Refer enclosure for description of various parts and

the electrical circuit connected with the automatic

KSB & TLA.