Geely EC718 2009 Workshop Manual page 674

2-592 Control System JL4G15-D
The throttle valve assembly opening is determined by ECM
according to the driver-controlled throttle pedal control input
signals, and other input signals. ECM calculates the vehicle
currently needed power to control the fuel supply (spray)
amount, and adjusts based on feedback signals to make sure
that the engine works in the best controlled status. Electronic
throttle body valve adds the drive motor, gear drive mechanism
and other components, as well as a function and reliability
enhanced throttle position sensor.
Without power supply, throttle body initial angle is 14.5
degrees. When the ignition switch is turned on, it has a 13
degree angle. At this point, the data stream readings of the
throttle body opening is 6.62 %. (Note: the former represents
percentage of opening, the latter perspective of value.)
13. Canister Solenoid Valve (EVAP)
The Canister control valve is located at the engine cylinder
head side (transmission side) and is used to control the
Canister clean air flow. ECM controls intake manifold gasoline
vapor volume through Canister solenoid valve. ECM sends
square pulse wave. Air flow volume and control square wave
pulse relationship is linear.
ECM changes canister working time and rate according to
engine speed and load conditions.
Solenoid valve coil resistance: 19-22 Ω.
EC718/EC718RV EC715/EC715RV 10/2009
14. Variable Valve Timing Solenoid Valve (VVT)
VVT solenoid valve is located at the engine intake manifold side
near the front. VVT magnetic valve is a 4-bit 4-pass solenoid
valve, the working power supplied from main relay controlled
by ECM. ECM controls VVT solenoid valve ground with a pulse
width modulation signal. The crankshaft to the camshaft timing
relations can be continuously changed. The best valve timing
control can be achieved at different engine running conditions.
This will help to increase engine efficiency, improve idle
stability, and provide more torque and power, while helping to
improve fuel economy and lower emissions of hydrocarbons
and nitrogen oxides.
Solenoid valve resistance: 7.2 Ω/20°C (68 ℉)
FE02-8036b
Engine
FE02-5133b