Chapter 2 Mi-04 Lpg System Operational Overview; Mi-04 General Description - Daewoo G420E Service Manual

CHAPTER 2 MI-04 LPG SYSTEM OPERATIONAL
OVERVIEW

MI-04 General Description

MI-04 control system is designed to provide a complete, fully integrated solution that will meet or exceed TIER-2
Large Spark Ignited Engines emission standards established by the California Air Research Board (CARB) and the
Environmental Protection Agency (EPA) for 2004. The MI-04 is a closed loop system utilizing a catalytic muffler to
reduce the emission level in the exhaust gas. In order to obtain maximum effect from the catalyst, an accurate
control of the air fuel ratio is required. A small engine control module (SECM) uses a heated exhaust gas oxygen
sensor (HEGO) in the exhaust system to monitor exhaust gas content.
Fault Light
Key switch
Accel Pedal
APP
Air Cleaner
Oxygen
Catalytic
Muffler
Figure 10
Tier
G420E/G424E
MI-04 System with the N-CA55-500 Mixer
Main
PWR
Relay
Vacuum Line
Mixer
DBW Throttle
TMAP
Engine
VR Sensor
LP Engine
Fuel Filter
LP Fuel Line
Fuel Lock
Converter
Coolant Line
TPS
Distributor
15
Fuel Trim Valve
SECM
Coolant Temp Sensor
System Operational Overview