Tài liệu đào tạo hệ thống nhiên liệu Hyundai Porter

In traditional diesel engines the pump is driven by the engine, and it’s function is to each injector and to regulate there opening to control engine speed.. Injection amount to control

Mechanical Injection pump

Conventional (VE) Type Injection Pump System

Fuel cut solenoid valve

Plunger springDrive disc

Fly weight Governor

Altitude Compensator

Timer

Full load adjusting screwControl

lever

Construction

In traditional diesel engines the pump is driven

by the engine, and it’s function is to each injector and to regulate there opening to control engine speed.

Injection amount to control engine speed are controlled by mechanical or electrical governor system located inside of injection pump, it controlled by accelerator pedal with cable or wiring (in case of electric governor system

Governor System

Injection Presser 110~140 bar

Control

Control sleeve Plunger spring Cam Disc

Out let

Fuel cut solenoid valve

Control lever

Regulating Valve

Drive shaft Feed pump

Plunger operation

The Pressure is generated by a plunger

Plungers are driven by Drive disc cams.

1 3

How to control

Minimum injection

Half injection

Full injectionFuel Control

Control sleeve Plunger spring Cam Disc

Delivery valve

Mechanical type Injection Pump

Injection amount to control engine speed are controlled by

mechanical governor system located inside of injection

pump, it controlled by accelerator pedal with cable

Governor system

Control sleeve Plunger spring Cam Disc

The amount of injections are changed by position of control

sleeve, it is controlled by fuel control lever through the tension

lever.

Fuel control by control lever

Control sleeve Plunger spring Cam Disc

Delivery valve

#2 Governor

2) Fuel control by Governor

When the engine rpm is over the limit, the Fly weights are

expended by centrifugal force and tension lever is moved back

by push load than the control sleeves are moved back too, so fuel

injection amount are decreased so it’s make reduce the engine

rpm

Fuel control by Governor

Control sleeve Plunger spring Cam Disc

Delivery valve

#2 Governor

3) Fuel Cut Control Valve

When you turn on the Ignition Key, the fuel cut solenoid plungers

are fuelled up by magnetic force due to energized solenoid coil

Fuel cut control valve

Control sleeve Plunger spring Cam Disc

Delivery valve

#2 Governor

4) Timing control system

Pressure rpm

Timing control system

COVEC-F System

COVEC-F fuel injection system (Computed VE Control system - Full)

- Improved Power Performance

- Increased Comfort

- Decreased Smoke at sudden Acceleration

- Additional Devices Unnecessary

System Overview

Block Diagram

Pump Speed

Sensor

Electronic Governor

Timing position Sensor

Timing Control Solenoid Valve

Fuel temperature sensor

GE actuator Cont rol sleeve position sensor

Compensation resistor

Construction

Control sleeve Plunger spring Cam Disc

Current Acceleration

Poison Sensor

Control sleeve position sensor

PE sensor

GE Actuator

Symptoms :

Symptoms :

Symptoms :

NP Sensor

Symptoms :

NP Sensor Signal

Symptoms :

CKP NP

Q Compensation Resistance

Symptoms :

- With Hi-Scan Pro DTC Erasing

- Short pin 3 to pin 7 in ECM

Symptoms :

FT(Fuel Temperature) Sensor

Symptoms :

ECT Sensor

Symptoms :

BPS with IAT

Symptoms :

Symptoms :

Fuel Cut Valve

Symptoms :

Symptoms :

Prohibitive Condition :

EGR- Stage 1

Duty

No Works

Normal Operation

Current Data

Actuation Test