Pedal del acelerador: Una guía experta para su 3 Componentes lógicos

Welcome to this expert technical guide on the Pedal del acelerador asamblea (Número de pieza. 1108010-42A-C00), the critical driver-to-engine interface for the FAW Jiefang CA4251P66K24T1A3E5 6×4 tractor semirremolque diésel. This is not a mechanical cable, but a sophisticated electronic sensor.

El Pedal del acelerador, parte del “Engine Control Unit Logic Assembly,” is the primary “torque request” sensor for the “drive-by-wire” sistema. It translates the physical movement of the driver’s foot into a precise voltage signal, which is then sent to the Engine Control Unit (ECU) to manage fuel injection and engine power.

Esta guía es un recurso esencial para los técnicos profesionales., administradores de flotas, y especialistas en repuestos. Deconstruiremos todo Pedal del acelerador asamblea y sus 3 componentes reparables, including the electronic pedal, its mounting hardware, and the critical firewall seal, to ensure a complete understanding of this vital system.

Componente central: Electronic Accelerator Pedal (1108010-42A-C00)

The main component is the ‘Electronic Accelerator Pedal Assembly’ (1108010-42A-C00). este es el completo Pedal del acelerador unidad. It has replaced the old-fashioned mechanical throttle cable. Este “drive-by-wire” system offers immense advantages in efficiency, seguridad, and integration with other systems like cruise control, control de tracción, and the engine brake.

El “lógica” de esto Pedal del acelerador lies in its internal sensors. The assembly is not just a pedal; it is a housing that contains a “non-contact” electronic sensor, typically a set of dual **potentiometers** or **Hall-effect sensors**. As the driver presses the pedal, it rotates a magnet or a wiper arm inside this sealed sensor unit.

This sensor outputs a precise, variable voltage signal (P.EJ., 0.5V at idle, 4.5V at full throttle) that is sent directly to the ECU. This signal is the “torque request” from the driver. A high-quality Pedal del acelerador sensor provides a smooth, linear signal, which allows the ECU to deliver power without any “dead spots” o “surging.”

The Critical Safety Logic: Dual Sensor Redundancy

A key feature of the Pedal del acelerador (1108010-42A-C00) is its fail-safe design. Because it is a 100% electrónico “drive-by-wire” sistema, a failure is a critical safety issue (P.EJ., a “atascado” full throttle). Para evitar esto, el Pedal del acelerador uses **dual redundant sensors**.

Inside the sensor housing are two (or sometimes three) separate potentiometers (APP1 and APP2) that read the same pedal movement. These two sensors are often programmed to work in opposite or parallel ways. Por ejemplo:

• **APP1 (Sensor 1):** May read from 0.5V (idle) up to 4.5V (full throttle).
• **APP2 (Sensor 2):** May read from 4.5V (idle) down to 0.5V (full throttle).

The ECU’s “lógica” constantly compares the signals from these two sensors. At any given pedal position, the sum of their voltages should be a constant 5.0V (in this example). If one sensor fails, the signals will no longer “agree” (P.EJ., 0.7V + 3.0V = 3.7V). The ECU instantly recognizes this “disagree” falla, logs a Diagnostic Trouble Code (DTC), illuminates the “Comprobar motor” light, and immediately puts the engine into a “limp-home” modo (P.EJ., idle-only power).

This redundancy is the core safety logic of the Pedal del acelerador. A fault in this component is often the cause of a sudden, unexplained loss of power or a “modo flácido” event. todo el Pedal del acelerador assembly must be replaced, as its internal sensors are sealed and not serviceable.

El sistema de montaje: Pernos (CQ1420840) and Seal (1108011-42A)

El Pedal del acelerador assembly is a simple three-part system, with two of those parts being the critical mounting hardware. The three ‘Combination Bolt’ (CQ1420840) fasteners are used to secure the entire assembly to the truck’s firewall or cab floor.

A “perno combinado” has a pre-installed, captive spring-lock washer. This is essential for preventing the bolts from vibrating loose over time, which would result in a “flexing” o “loose” pedal, providing poor driver feedback and potentially damaging the sensor. The 3-bolt “tripod” pattern provides a very stable, rigid mount for the Pedal del acelerador.

The ‘Sealing Plug Cover’ (1108011-42A) is the third and final component. This is not just a cosmetic cover; it is a critical environmental seal. This large rubber grommet or foam/plastic cover is designed to seal the large hole in the firewall where the Pedal del acelerador assembly passes through.

This seal serves four critical functions for the driver:

1. **Ruido:** It blocks the immense noise from the diesel engine bay.
2. **Fumes:** It prevents toxic, dangerous fumes (escape, aceite) from entering the cab.
3. **Temperature:** It seals out the scorching heat from the engine bay in summer and the freezing cold in winter.
4. **Agua:** It prevents water, nieve, and road salt from splashing into the cab.

FAW Accelerator Pedal Parts List

La siguiente tabla proporciona la información completa, desglose detallado de todos 3 components identified in the ‘Accelerator Pedal’ diagrama para el tractor FAW CA4251P66K24T1A3E5. El Pedal del acelerador is a key part of the engine’s electronic control system.

Especificaciones técnicas y contexto de montaje.

Las especificaciones para el Pedal del acelerador are defined by its function as a high-reliability electronic sensor. Este Pedal del acelerador is a key input for the Engine Control Unit Logic Assembly.