Geely Emgrand X7. Manual part — 27

During a sudden acceleration or engine speed change, knocking is likely to happen. The system
predicts the likelihood of knocking, and automatically delays the ignition advance angle in order
to avoid a strong knocking.

–

Quickly delayed ignition advance angle

Once the system detects a knocking, according to different engine speeds, the system rapidly
delays ignition advance angle 3-5 degrees, and resumes to normal controls in 2-3 s afterward.

–

Adaptive control ignition advance angle

Due to wear and tear after long-term use, there is certain difference between the engines. When the
system and the engine are in initial use or ECM is resupplied with power, the engine knocking
may occur. The system will record the knocking, after a period of running-in, the system will
automatically generate an adaptive adjustment value of the ignition (self-learning value). When
the engine is running in the same conditions, the system will automatically make the adaptive
adjustment for the advance the ignition angle, to avoid the knocking occurring.

System adaptive learning is the constantly updating during the engine running.

2.2.3.7 Air-conditioning Switch off Control

In some cases, in order to ensure the engine power or protect the engine or protect the
Air-Conditioning system, ECM must stop the Air-Conditioning compressor working or prohibit
the Air-Conditioning system to start. At the same time, to prevent the frequently on-off of
compressor clutch, once the system enters the Air-Conditioning switch off mode, ECM delays for
a specified period of time to control Air-Conditioning clutch pull-in.

–

Full-throttle Air-Conditioning Switch off Mode: Ensure the vehicle power.

The engine speed is less than 3,600 rpm.

No TPS fault

TPS is greater than 101%, and since the last time full-throttle air-condition-off, the TPS has been
less than this value

– Engine Speed Too High Air-Conditioning Switch off Mode: Protect the Air-Conditioning

system.

A/C off, the engine speed should be less than 5,800 rpm before the compressor is allowed to start.

When A/C is on, once the engine speed is greater than 6,000 rpm, the compressor will be switched
off.

– Engine Coolant Temperature Too High Air-Conditioning Switch off Mode: Protect the

engine.

A/C off, the coolant temperature should be less than 106°C (223°F) before the compressor is
allowed to start.

A/C on, once the coolant temperature is greater than 108°C (226°F), the compressor will be
switched off.

2.2.3.8 Canister Solenoid Valve Control

Canister solenoid valve controls the opening and closing event and time of the channel between
the canister and intake pipe, so as to control the amount and time for fuel vapor entering the
cylinders, therefore maximizing the decrease of the vehicle evaporative emissions, while
minimizing the impact on engine performance.

1. Working conditions of canister solenoid valve

In order to reduce the impact on the normal combustion and doing work from the fuel vapor
entering the cylinder, the following conditions must be met before the canister solenoid valve is
open:

–

System voltage is less than 18 V but more than 8 V

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–

Engine coolant temperature is more than 0℃ (32 °F)

–

Engine intake air temperature is higher than 0℃ (32 ºF)

–

Non-correlation system fault

• Fuel

System

Malfunction

•

Fuel Pump Malfunction

•

Idle Speed Too High/Too Low Malfunction

•

Intake Air Pressure Sensor Malfunction

•

Engine Misfire Malfunction

•

Front Oxygen Sensor Heating Malfunction

•

Front Oxygen Sensor Signal Malfunction

•

System Voltage Too Low/Too High Malfunction

•

Crankshaft Position Sensor Malfunction

• Ignition

Coil

Malfunction

•

Fuel Injector Nozzle Malfunction

•

Canister Solenoid Valve Output Malfunction

2. Operating

Mode

Canister solenoid valve opening is determined by ECM according to the duty cycle (PWM) signal
coming from the engine status. In the non-idling state, the maximum canister solenoid valve
opening is determined by the close-loop air flow with a maximum of 100%.

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2.2.4 Component Location

2.2.4.1 Engine Coolant Temperature Sensor, Electronic Throttle Body, Intake Pressure
Temperature Sensor

1

2

3

NL02-1002e

1. Engine Coolant Temperature Sensor

2. Electronic

Throttle

Body

3. Intake Pressure Temperature Sensor

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2.2.5 Disassemble drawings

2.2.5.1 Electronic throttle body disassembly drawing

6

5

4

3

2

1

10

9

8

7

FE02-8042b

1. Fixing Bolts of Throttle Valve

2. Throttle

Valve

3. Fixing Bolts of Throttle Drive Motor

4. Throttle Drive Gear

5. Seal

Plate

6. Fixing Bolts of Seal Plate

7. Throttle

Body

8. Throttle Drive Motor

9. Throttle Position Sensor

10. Fixing Bolts of Throttle Position Sensor

110