Great Wall GW491QE, Service Manual

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EF.1-2
Model GW491QE petrol engine adopts BOSCH Motronic1.5.4 and Motronic7.9.7 engine management system
for electric-injection: As for the exhaust, the former is in compliance with European Class-II standard, and the
latter is in compliance with European Class-III standard.
BOSCH Motronic1.5.4 engine management system for electric-injection
As one set of advanced engine management system, M1.5.4 system has one engine electronic control unit
abbreviated to ECU used as the control center, and is able to measure various working parameters of
engine using appropriate sensors installed at different position of engine, to precisely control the oil injection
amount and the ignition lead-angle as per control programs set in engine electronic control unit, and to have
engine working with best performance under various conditions, ie. optimum dynamic output, most cost-
effective oil consumption, and best tail gas exhaust.
M1.5.4 system is subject to a multi-point oil injection control as per some sequence, and its control strategy
covers: starting control, closed-loop control of idle-speed, closed-loop control of air /fuel ratio, carbon-canister
control, transition working condition control, ignition angle control, knock control, air-conditioner control, slide
oil cut control, over-speed oil cut control, heating &protection control by three-way catalytic converter, and
system self-diagnosis, etc. The system has provided ABS, automatic gear box, air bag, etc, with applicable
communication interfaces, and is with theft-prevention function. The system is composed of three parts: sensor
air inlet pressure /temperature sensor, throttle position sensor, cooling-fluid temperature sensor, knock sensor,
oxygen sensor LSH25, rotating speed sensor, phase sensor , actuator idle-speed adjustor EWD3, oil injector
EV6, electrical fuel pump, fuel pressure adjustor DR, carbon-canister control valve TEV, and ignition coil
ZSK , and ECU electronic controller.
BOSCH Motronic7.9.7 engine management system for electric-injection
The key feature of M7.9.7 engine electronic control management system is the application of a control
strategy based on torque aimed at linking a number of various controlled objects together. And this is the only
fixed method to have various functions integrated on ECU flexibly in accordance with the model of engine and
vehicle.
Basic components within the M7.9.7 engine electronic control system include: electronic controller ,
air inlet pressure /temperature sensor, air mass flowmeter, cooling-fluid temperature sensor, throttle position
sensor, phase sensor, rotating speed sensor, knock sensor, oxygen sensor, idle-speed adjustor, oil injector,
electronic fuel pump, fuel pressure adjustor, oil pump support, fuel distributing pipe, carbon-canister control
valve, and ignition coil.
M7.9.7 engine management system, namely a petrol engine electronic control system, is available with many
control characteristics fit for operator, vehicle, and device, and is the combination of open-looped control and
closed loop control feedback to provide various control signals while engine is running. Key function of
system includes:
1. An application physical model of basic engine management function
(a) System structure based on torque
(b) The cylinder loading capacity to be determined by the air inlet pressure sensor /air-flow sensor
(c) Improve the function as to control the gas mixture under a static or dynamic status;
(d) typed closed-loop control
(e) Fuel injection by cylinder as per some sequence
(f) Ignition timing, inclusive of knock control by cylinder
Description of system
UASE Electronic Control Engine Management System -System Introduction
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