Description
Designed and manufactured under Schaeffler Group’s precision engineering standards, the INA Electronic Throttle Body (ETB) serves as a critical air-metering component for modern Drive-by-Wire (DbW) engine management architectures. Replacing traditional mechanical cable links, this unit combines an advanced brushless/brushed DC electric actuator, ultra-precise gear reduction, dual non-contact position sensors, and a dynamic throttle valve plate within an optimized die-cast aluminum body. Communicating directly with the Powertrain Control Module (PCM), the INA ETB executes dynamic position adjustments in fractions of a second to control engine breathing during idling, rapid acceleration, cruise control, and emissions regeneration cycles. Built to survive extreme intake air temperatures, severe vibration levels, and oily crankcase blow-by gases, it eliminates dead pedal lag, restores sharp throttle response, and stabilizes engine idling. It is a ideal OE-matching replacement part for auto parts distributors, engine rebuilders, and automotive diagnostic centers.
Technical Parameters
| Category | Specifications & Technical Details |
| Redundant Non-Contact Hall Effect Angle Sensing System | Utilizes completely non-contact dual-channel Hall effect magnetic sensing technology to monitor the throttle plate shaft rotation angle. This architecture eliminates signal noise and short-circuit risks caused by brush wear in traditional carbon-film potentiometers, ensuring the angle signal fed back to the ECU has a linearity error no greater than ±0.5%. Even under prolonged high-frequency vibration, it accurately reads throttle position. |
| High-Torque Actuator Motor & Low-Backlash Gearbox | The assembly incorporates a high-dynamic-response high-magnetic motor, combined with a low-backlash reduction gear transmission mechanism. It completes the full-closed to full-open action in less than 50 ms, effectively eliminating power lag when the driver presses the accelerator, achieving instantaneous airflow switching and excellent driving smoothness. |
| Mechanical Fail-Safe Dual Spring Architecture | Internally integrates two sets of independently acting mechanical return springs. When encountering electrical system power loss, abnormal sensor signals, or control circuit faults, the spring system immediately pulls the throttle plate back to the preset “Limp-Home Mode” angle (typically maintained at 5° to 7°). This prevents the plate from sticking in the fully open position and causing unintended vehicle surging, ensuring driving safety. |
| CNC-Precision Valve Bore & Ultra-Low Idle Air Bypass | The throttle body intake bore and aluminum alloy throttle plate edges are machined by high-precision CNC machine tools, with fit tolerances controlled at micron level. Under fully closed idle conditions, parasitic air leakage is strictly limited to below 1.5 kg/h, preventing additional unmetered air from entering the combustion chamber and completely eliminating idle hunting. |
| Rugged Die-Cast Aluminum Housing with IP6K9K Sealing | The overall housing is constructed from high-rigidity die-cast aluminum alloy. The electronic and motor control compartment meets IP6K9K protection standards. It effectively isolates high-pressure washing spray, moisture, high-temperature oil contamination, and oil vapor and carbon deposit corrosion from the PCV system. Operating temperature range reaches -40°C to +140°C. |
Applicable Car Brands & Models
Common operational failure signs include:
Dashboard Warning Lights: Sudden illumination of the Check Engine Light or Electronic Power Control (EPC) light.
Unstable or Rough Idling: The engine fluctuates between low and high RPMs when stopped or stalls out completely.
Limp-Home Mode Activation: The ECU restricts vehicle speed and throttle opening due to internal motor or sensor signal errors.
Sluggish Acceleration: Noticeable delay when depressing the accelerator pedal, accompanied by unexpected engine hesitation.
Yes. Once a new electronic throttle body is installed, a Throttle Body Adaptation (Relearn) procedure must be completed using an OBD-II diagnostic tool or factory scan software. This step allows the ECU to wipe previous learned offsets from the worn component and store the exact voltage references for the physical minimum 0% and maximum 100% throttle plate positions.
INA electronic throttle bodies feature precision-machined internal contours and high-torque electric motors that prevent the throttle plate from sticking when PCV oil mist condenses inside the bore. Additionally, the electronic actuator chamber is hermetically sealed to keep corrosive engine blow-by gases away from the sensor circuits.
Each INA Electronic Throttle Body is packed in an individual Schaeffler INA branded protective box, lined with anti-static bubble wrapping and protective covers on the mounting flange and electrical connector. For international B2B orders, the minimum order quantity typically starts at 5 to 10 units per part number, with palletized shipments arranged for bulk distributor orders.
