Pedal Acelerador FAW: Um guia especializado para seu 3 Componentes Lógicos

Bem-vindo a este guia técnico especializado sobre o Pedal Acelerador FAW conjunto (Parte não. 1108010-42A-C00), the critical driver-to-engine interface for the FAW Jiefang CA4251P66K24T1A3E5 6×4 trator semirreboque diesel. This is not a mechanical cable, but a sophisticated electronic sensor.

O Pedal Acelerador FAW, parte do “Engine Control Unit Logic Assembly,” é o principal “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.

Este guia é um recurso essencial para técnicos profissionais, gestores de frota, e especialistas em peças. Vamos desconstruir todo Pedal Acelerador FAW montagem e sua 3 componentes reparáveis, including the electronic pedal, its mounting hardware, and the critical firewall seal, to ensure a complete understanding of this vital system.

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

The main component is the ‘Electronic Accelerator Pedal Assembly’ (1108010-42A-C00). Este é o completo Pedal Acelerador FAW unidade. It has replaced the old-fashioned mechanical throttle cable. Esse “drive-by-wire” system offers immense advantages in efficiency, segurança, and integration with other systems like cruise control, Controle de tração, and the engine brake.

O “lógica” disso Pedal Acelerador FAW 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 (Por exemplo, 0.5V at idle, 4.5V at full throttle) that is sent directly to the ECU. This signal is the “torque request” do motorista. Um produto de alta qualidade Pedal Acelerador FAW sensor provides a smooth, linear signal, which allows the ECU to deliver power without any “dead spots” ou “surging.”

The Critical Safety Logic: Dual Sensor Redundancy

Uma característica fundamental do Pedal Acelerador FAW (1108010-42A-C00) is its fail-safe design. Porque é um 100% eletrônico “drive-by-wire” sistema, a failure is a critical safety issue (Por exemplo, a “stuck” full throttle). To prevent this, o Pedal Acelerador FAW 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 exemplo:

• **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” (Por exemplo, 0.7V + 3.0V = 3.7V). The ECU instantly recognizes this “disagree” falta, logs a Diagnostic Trouble Code (DTC), illuminates the “Verifique o motor” luz, and immediately puts the engine into a “limp-home” mode (Por exemplo, idle-only power).

This redundancy is the core safety logic of the Pedal Acelerador FAW. A fault in this component is often the cause of a sudden, unexplained loss of power or a “modo manco” event. O inteiro Pedal Acelerador FAW conjunto deve ser substituído, as its internal sensors are sealed and not serviceable.

O sistema de montagem: Parafusos (CQ1420840) and Seal (1108011-42A)

O Pedal Acelerador FAW 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 “parafuso de combinação” 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 “flexão” ou “solto” pedal, providing poor driver feedback and potentially damaging the sensor. The 3-bolt “tripod” pattern provides a very stable, rigid mount for the Pedal Acelerador FAW.

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 Acelerador FAW assembly passes through.

This seal serves four critical functions for the driver:

1. **Barulho:** It blocks the immense noise from the diesel engine bay.
2. **Fumes:** It prevents toxic, dangerous fumes (escape, óleo) from entering the cab.
3. **Temperatura:** It seals out the scorching heat from the engine bay in summer and the freezing cold in winter.
4. **Água:** Impede a água, neve, and road salt from splashing into the cab.

FAW Accelerator Pedal Parts List

A tabela a seguir fornece o completo, detalhamento de todos 3 components identified in the ‘Accelerator Pedal’ diagrama para o trator FAW CA4251P66K24T1A3E5. O Pedal Acelerador FAW is a key part of the engine’s electronic control system.

Especificações Técnicas e Contexto de Montagem

As especificações para o Pedal Acelerador FAW are defined by its function as a high-reliability electronic sensor. Esse Pedal Acelerador FAW is a key input for the Engine Control Unit Logic Assembly.