Remote Vehicle Engine Speed Control via Rotary Encoder
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Solution Overview
Problem
Existing systems lack the capability to remotely and efficiently control the speed of vehicle engines, particularly in applications like fire trucks, where engine power is needed for both propulsion and operation of mounted equipment, requiring manual adjustment from a location other than the vehicle cab.
Innovation Solution
A remote control apparatus with a housing, control knob, rotary encoder, and processor that generates signals to a primary engine control unit to adjust engine speed, including an interlock system for safety and an idle button for setting engine speed to idle, allowing operators to control engine speed from a distant location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If engine control is centralized in the vehicle cab, then control simplicity is maintained, but operational flexibility and safety are limited when engine power is needed for mounted equipment
Solution Approach 1:
The control system is segmented into two separate locations: the primary engine control unit remains in the vehicle cab, while a remote control unit is positioned at the equipment location. This segmentation allows operators to control engine speed from either location, providing operational flexibility without requiring complete redistribution of control functions.
Solution Approach 2:
A communication interface and control unit act as intermediaries between the remote control location and the primary engine control system. The remote control unit generates control signals that are transmitted through this intermediary system to the primary control unit, enabling remote operation while maintaining system integration and safety protocols.
2Ease of operation
If remote control capability is added to the engine control system, then operational flexibility is improved, but system complexity increases
Solution Approach 1:
The primary engine control unit is designed with multi-functionality to handle both local cab operations and remote control signals. The control unit can process commands from either the traditional cab interface or the remote interface, eliminating the need for completely separate control systems and reducing overall complexity.
Solution Approach 2:
The system incorporates feedback mechanisms where the primary control unit receives and processes control signals from the remote unit, and the system status is monitored to ensure proper engine operation. This feedback loop enables safe remote operation while maintaining system integrity through automated monitoring and control.
3Productivity
If manual control of engine speed is enabled remotely, then operational efficiency is enhanced, but safety risks may increase without proper controls
Solution Approach 1:
The control system incorporates feedback mechanisms where the primary control unit receives and processes control signals from the remote unit, and the system status is monitored to ensure proper engine operation. This feedback loop enables safe remote operation while maintaining system integrity through automated monitoring and control.
Solution Approach 2:
The system is designed with preliminary safety measures including an interlock system that prevents unauthorized or unsafe operation. The control unit validates control signals before executing engine speed changes, and the system can be configured with safety protocols that must be satisfied before remote control becomes active, preventing unsafe operations before they can occur.
Data Source
AI summary
An apparatus for remotely controlling the speed of an engine includes a housing and a control knob. A position shaft is fixedly connected to the control knob for rotation therewith and a position gear is fixedly secured to the position shaft for rotation therewith. A rotary encoder has a shaft in operative engagement with the position gear such that rotation of the position gear rotates the encoder shaft. The rotary encoder generates output signals based on a direction of rotation and angular displacement of the control knob. A processor receives the output signals from the rotary encoder and generates output signals proportional to the direction of rotation and angular displacement of the control knob. A primary engine control unit is remotely located with respect to the remote housing for receiving the output signals from the processor and directly controlling the speed of the engine based upon the received signals.