Honda CIVIC 10G 2016 Turbocharger Control System Page 1

Turbocharger Control System Description - Control
Outline
The turbine in the turbocharger is turned by the exhaust gas, compresses the fresh intake air with the compressor mounted coaxially
with the turbine, and discharges the air into the charge air cooler. The fresh intake air gets hot when compressed, is cooled in the
charge air cooler, then enter the cylinders.
The turbocharger equips with the turbocharger wastegate control valve and the turbocharger bypass control valve to control the
system pressure and gas flow rate. The turbocharger wastegate control valve is actuated by an electric actuator.
Operation
To control the boost pressure, the PCM changes the turbocharger wastegate control valve open ration using the duty control of the
stroke of the turbocharger wastegate control actuator.
When the turbocharger wastegate control valve closes, all the exhaust gas flows from the exhaust manifold to the turbine and serves
the driving force for turning the turbine. This increases the turbine shaft speed and increases the compression pressure of the fresh
intake air, causing the boost pressure to increase.
When the turbocharger wastegate control valve opens, some of the exhaust gas bypasses the turbine and flows directly into the
catalytic converter mounted downstream of the turbocharger. This decreases the turbine shaft speed, causing the boost pressure to
decrease. This mechanism prevents the boost pressure from increasing excessively, and protects the engine and turbocharger.
The turbocharger bypass control valve consists of a diaphragm, a return spring, and a valve and is connected to the turbocharger
bypass control solenoid valve for control.
Normally, the turbocharger bypass control solenoid valve is kept ON by the PCM. Because equal pressure is applied to the both sides
of the diaphragm, the turbocharger bypass control valve is kept closed by the return spring.
When the throttle valve is closed from the supercharged condition, the PCM turns OFF the turbocharger bypass control solenoid
valve. At this time, the negative pressure in the downstream of the throttle valve, which has passed through the solenoid valve, is
applied to the solenoid side of the diaphragm, causing a pressure difference between the both sides of the diaphragm. The differential
pressure overcomes the return spring force and the valve opens, causing the fresh intake air which has passed through the
compressor to leak into the upstream of the compressor. This adjusts the system internal pressure and at the same time prevents the
intake air drag in the compressor from increasing and the turbine shaft speed from decreasing, which provides improved response at
the time of re-acceleration.
Engine Output Control
The turbocharger wastegate control actuator is an electric type, which enables flexible and precise control of the turbocharger
wastegate control valve open ratio regardless of the operating condition of the engine. This enables the turbocharger wastegate
control valve to function as an engine output control device in cooperation with the throttle valve.
Turbocharger Control System Description - Control 3278 http://techinfo.honda.com/rjanisis/pubs/sm/1/2/Contents/enu/61TBAD/...
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Contents Summary of Turbocharger Control System

  • Page 1Turbocharger Control System Description - Control Outline The turbine in the turbocharger is turned by the exhaust gas, compresses the fresh intake air with the compressor mounted coaxially with the turbine, and discharges the air into the charge air cooler. The fresh intake air gets hot when compre
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  • Page 3In the area where the intake manifold absolute pressure (PBA) is below the atmospheric pressure (NA area), the engine output is controlled by changing the throttle valve open ratio. In the NA area, the turbocharger wastegate control valve is opened to keep the pressure in the upstream of the throttl
  • Page 4Turbocharger Boost Sensor Removal and Installation 1 cardiagn.com Torque: N·m (kgf·m, lbf·ft) Replace 1. Turbocharger Boost Sensor - Remove 2. All Removed Parts - Install 1. Install the parts in the reverse order of removal.
  • Page 5Turbocharger Boost Sensor Removal and Installation 1. Turbocharger Boost Sensor - Remove 1. Disconnect the connector (A). 2. Remove the turbocharger boost sensor (B) with the O-ring (C). 2. All Removed Parts - Install cardiagn.com 1. Install the parts in the reverse order of removal with a new O-rin
  • Page 6Turbocharger Bypass Control Solenoid Valve Inspection 1. Engine Cover - Remove 2. Turbocharger Bypass Control Solenoid Valve - Bypass Air Line Open Stuck Check Type A 1. Disconnect the hoses (A) 2. Connect the vacuum pump to the turbocharger bypass control solenoid valve (B) as shown. 3. Apply vacuu
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  • Page 84. Turbocharger Bypass Control Solenoid Valve - Bypass Air Line Closed Stuck Check 1. Turn the vehicle to the ON mode. 2. Select TURBOCHARGER BYPASS CONTROL SOLENOID VALVE ON in the INSPECTION MENU with the HDS. 3. Reapply vacuum to the port. If it holds vacuum, replace the turbocharger bypass contr
  • Page 9Type B cardiagn.com 6. Turbocharger Bypass Control Solenoid Valve - Vacuum Line Open Stuck Check 1. Turn the vehicle to the ON mode. 2. Select TURBOCHARGER BYPASS CONTROL SOLENOID VALVE ON in the INSPECTION MENU with the HDS. 3. Reapply vacuum to the port. If it does not hold vacuum, replace the tur
  • Page 10Turbocharger Bypass Control Solenoid Valve Inspection 1. Turbocharger Bypass Control Solenoid Valve - Bypass Air Line Open Stuck Check 1. Disconnect the hoses (A). 2. Connect the vacuum pump to the turbocharger bypass control solenoid valve (B) as shown. 3. Apply vacuum to the port. If it holds vacu
  • Page 111. Connect the vacuum pump to the turbocharger bypass control solenoid valve (A) as shown. 2. Apply vacuum to the port. If it does not hold vacuum, release the vacuum, then go to step 5. If it holds vacuum, replace the turbocharger bypass control solenoid valve. cardiagn.com 5. Turbocharger Bypass C
  • Page 12Turbocharger Bypass Control Solenoid Valve Removal and Installation NOTE: Where icon is shown, click for further information. 1 Type A 1/2 cardiagn.com Torque: N·m (kgf·m, lbf·ft) Replace *1 Special parts 2 Type A 2/2
  • Page 13cardiagn.com Detailed information, notes and precautions Torque: N·m (kgf·m, lbf·ft) 3 Type B
  • Page 14cardiagn.com Torque: N·m (kgf·m, lbf·ft) Type A 1. Engine Cover - Remove 2. Harness Holder - Move 3. Turbocharger Bypass Control Solenoid Valve Pipe A - Remove Note for installation Make sure the hose clamps are properly positioned and tightened, and make sure that they do not interfere with the sur
  • Page 151. Install the parts in the reverse order of removal. Type B 1. Turbocharger Bypass Control Solenoid Valve - Remove 2. All Removed Parts - Install 1. Install the parts in the reverse order of removal. cardiagn.com
  • Page 16Turbocharger Bypass Control Solenoid Valve Removal and Installation 1. Turbocharger Bypass Control Solenoid Valve - Remove 1. Disconnect the connector (A) and the hoses (B). 2. Remove the turbocharger bypass control solenoid valve (C). cardiagn.com 2. All Removed Parts - Install 1. Install the parts
  • Page 17Turbocharger Bypass Control Valve Inspection Special Tool Required Image Description/Tool Number Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially available cardiagn.com 1. Turbocharger Bypass Control Valve - Inspect 1. Disconnect the vacuum hose (A). 2. Connect the vacuum pum
  • Page 18Turbocharger Bypass Control Valve Inspection Special Tool Required Image Description/Tool Number Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000B* or equivalent, commercially available cardiagn.com *Available through the Acura Tool and Equipment Program 888-424-6857 1. Turbocharger Bypass Control Valve
  • Page 19Turbocharger Removal and Installation NOTE: Turbocharger/bracket mounting bolts and nuts (*) to be tightened in a particular order. 1. Turbocharger - Exploded View Exploded View cardiagn.com
  • Page 20cardiagn.com NOTE: Refer to the Exploded View if needed during this procedure. 1. Engine Coolant - Drain
  • Page 212. Intake Air Duct - Remove cardiagn.com
  • Page 22NOTE: After installation, check the length of the bands as shown. cardiagn.com 3. EVAP Canister Purge Nozzle - Remove 4. Turbocharger Joint - Remove 1. Disconnect the connector (A).
  • Page 232. Remove the harness holder (C) and the hose joint (D). cardiagn.com 3. Disconnect the hoses (E), the breather hose (F), and intake air duct G. NOTE: Make sure the end of hose band is aligned with the mark on the hose band after intake air duct G is installed. 4. Remove the turbocharger joint (H).
  • Page 248. Oil Feed Pipe - Remove NOTE: After installation, make sure the washer portion (A) is cardiagn.com installed on the area (B) as shown. 9. Turbocharger and Bracket - Remove
  • Page 251. Disconnect the water inlet hose (A), the water outlet hose (B), and the oil return hose (C). 2. Remove the bracket (D) and the turbocharger (E). NOTE: Do not hold the wastegate control valve rod (F) and the turbocharger wastegate control actuator (G). 10.Water Pipe and Oil Return Pipe - Remove ca
  • Page 261. Install the parts in the reverse order of removal. NOTE: Tighten the turbocharger/bracket mounting bolts and nuts in the numbered sequence shown. 12.Engine Oil Level - Check cardiagn.com Procedure After Replacing Turbocharger 13.PCM - Reset 14.PCM Idle - Learn
  • Page 27Turbocharger Removal and Installation NOTE: Where icon is shown, click for further information. 1 cardiagn.com
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  • Page 29Replace 2 cardiagn.com Detailed information, notes, and precautions Replace 3
  • Page 30cardiagn.com Replace 1. Engine Coolant - Drain 2. Engine Cover - Remove 3. A/C Condenser Fan Shroud Assembly - Remove 4. Water Bypass Pipe - Move
  • Page 315. Turbocharger Inlet Joint Pipe - Remove 6. TWC Assembly - Remove 7. Charge Air Cooler Hose - Disconnect NOTE: Remove the necessary part(s). 8. Water Pipe - Move 9. Oil Feed Pipe - Remove cardiagn.com 10.Turbocharger - Remove NOTE: Do not hold the wastegate control valve rod (A) and the turbocharge
  • Page 32NOTE: Where icon is shown, click for further information. 1 cardiagn.com Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) Replace
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  • Page 342 cardiagn.com Detailed information, notes, and precautions Torque: N·m (kgf·m, lbf·ft) Replace 3
  • Page 35cardiagn.com Torque: N·m (kgf·m, lbf·ft) Replace 1. Oil Return Pipe - Install
  • Page 36NOTE: If removed the oil return hose, install it as shown. Apply new engine oil to the inside edge of the oil return hose. 2. Charge Air Cooler Pipe - Install 3. Turbocharger - Install cardiagn.com NOTE: Tighten the turbocharger/bracket mounting bolts and nuts in the numbered sequence shown. 4. Oil
  • Page 372. Tighten the oil feed pipe mounting bolt (A) and the oil feed pipe orifice bolt (B) until the oil feed pipe sit on the turbocharger and the engine block. 3. Tighten the oil feed pipe mounting bolt to the specified torque. 4. Set the washer portion (C) to the direction of D. 5. Tighten the oil feed
  • Page 3813.Engine Oil Level - Check Procedure After Replacing Turbocharger 14.PCM - Reset cardiagn.com