Chapter V GW4D20 / GW4D20B Turbocharged Diesel Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
215
Chapter V GW4D20 / GW4D20B Turbocharged Diesel Engine
Fig. 5-1-2 Right view of GW4D20
turbocharged diesel engine
Fig. 5-1-3 Top view of GW4D20 turbocharged
diesel engine
Section I General
GW4D20 / GW4D20B turbocharged diesel engine
employs four-in-line, 16-valve and double overhead
camshaft (DOHC) technologies to increase the opening
area of the valve and improve volumetric efficiency so
as to boost the rated power and provide larger power at
high speed.
GW4D20 / GW4D20B turbocharged diesel engine
adopts DELPHI, BOSCH or XINFENG high-pressure
common rail system. It mainly consists of various
sensors, ECU actuators and connecting wires. The
max. fuel supply pressure is 1600 bar~1800 bar. And
the fuel supply process is automatically controlled by
electronic control unit (ECU).
GW4D20 / GW4D20B turbocharged diesel engine uses
electronically-controlled exhaust gas recirculation
(EGR) technique. The opening height of EGR valve is
driven by the motor to achieve more precise control of
EGR rate so as to control the density of NO
x
in
emissions.
At
the
same
time,
the
electronically-controlled EGR valve is equipped with
self-cleaning function which prevents the seizure of the
valve to a grate degree.
GW4D20 / GW4D20B turbocharged diesel engine is
mainly used for Hover and Fengjun models of Great
Wall Motor Company Limited and similar models of
other complete vehicle manufacturing enterprises.
GW4D20 turbocharged diesel engine has a rated
power of 110 kW / 4000 r / min, a max. torque of 310
N·
m /
（
1800~2800
）
r / min and a min. fuel consumption
rate of 210 g / kW·
h.
GW4D20 turbocharged diesel engine is equipped with
DELPHI fuel supply system and variable geometry
exhaust turbocharger (VGT).
GW4D20B turbocharged diesel engine has a rated
power of 100 kW / 4000 r / min, a max. torque of 310
N·
m /
（
1800~2800
）
r / min and a min. fuel consumption
rate of 210 g / kW h.
GW4D20B turbocharged diesel engine is optionally
installed with BOSCH, DELPHI or XINFENG fuel supply
system and equipped with WGT turbocharger.
