check the carbon jar state.
3. Avoid the water ,fuel and other liquid enter into valve during the maintenance.
4. For avoiding the solid-borne sound, suggest hanging the carbon jar in the air, installing on the soft tube.
Simple measure method:
(Take down the stitches) put the DMM gear to ohm, two instrument pens connect with the carbon jar control
valve stitches separately, at the 20 ,the rating resistance is 26±4
℃
Ω
.
Section
Ⅵ
ignition system
This type engine electric ignition system adopts two ignition coils, not distributor ignition system. The high
tension electricity ignition coil produced is sent to every spark plug, ignition coil exterior like the left picture
showing
，
its circuit like the right picture showing.
Ignition system is made up of ignition coil , spark plug and its circuit.
Ignition working principle
Two ignition coils were controlled by computer, produce high tension by turns, each ignition coil connect
with two cylinder spark plug (1. 3. cylinder connect one ignition coil, 2.3. cylinder connect with the other one).
So, every time both two cylinder spark plug flashover at the same time, the cylinder which at the end of pressure
stroke can ignite the mixing air and break out for working, it’s a “effective ignition”; conjugated cylinder is at the
instroke, belongs to “inefficacy ignition”. This high tension power distribution , though lost a little power because
of inefficacy ignition, however this let the ignition system cancelled the distributor block, improved the ignition
reliability ,decreased fault.
Spark plug
AF10-06 electroject engine spark plug type: F6RTC(4C7T) screw thread M14×1.25
Useful time: run 30,000km ,change
BG13-20 electroject engine spark plug type: K7RTC
Useful time: run 10,000 km change
Electrode clearance: 0.7
－
0.8mm
Check
•Electrode abrasion state
•Carbon deposition
•Insulant damage state
Attention: hold rubber tube tightly , pull out high voltage damper, then take down spark plug.
a. If find abnormal , adjust air clearance, use spark plug cleaner cleaning or change new spark plug accord with
the regulation.
b. install spark plug and screw down torsional moment accord with the regulation.
Spark plug prescribe screw down torsional moment: 25N·m
c. Hold the rubber tube, install and fasten the high voltage damper.
Section
Ⅶ
fuel injection and electic control system notice
Normal tools and special tester
Some tools and meters are needed when diagnosis and checking the malfunction. Before using these tools
and meters, we must know its structure, performance, and notice to decide which electric system metering can be
suitable. The electric control system of engine is very sensitive about the voltage, so when check and fix it should
be very careful, don’t test and fix optionally. Now we introduce several normal tools and special tester.
