Industrial Vehicle Controller Engine Speed Adaptation
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Solution Overview
Problem
Conventional industrial vehicle controllers do not adequately optimize engine performance across various operational states, limiting the maximum advantage of engine performance and operational efficiency, especially in distinguishing between traveling and non-traveling operations.
Innovation Solution
A controller with a traveling operation detection system and upper limit setting mechanism that differentiates between first and second engine speed upper limits based on detected operations, allowing for optimized engine performance in both traveling and non-traveling states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the engine speed is controlled within a single upper limit determined by traveling performance, then the vehicle traveling performance is ensured, but the engine performance cannot be maximized during non-traveling operations such as loading
Solution Approach 1:
The patent applies dynamics by making the engine speed upper limit adjustable based on operational state. The controller dynamically switches between a first upper limit (for traveling operations) and a second upper limit (for non-traveling operations), allowing the system to adapt its parameters according to real-time operational requirements rather than using a fixed limit
Solution Approach 2:
The patent changes the engine speed parameter based on operational state. By detecting whether the vehicle is in traveling or non-traveling mode, the controller adjusts the engine speed upper limit parameter accordingly - using a lower first upper limit during traveling and a higher second upper limit during non-traveling operations, thereby optimizing engine performance for each operational context
2Productivity
If the engine speed upper limit is set based on traveling performance, then vehicle stability during traveling is maintained, but operational efficiency during loading operations is reduced
Solution Approach 1:
The system dynamically adjusts the engine speed upper limit based on the detected operational state. During loading operations (non-traveling mode), the controller implements a second upper limit that allows higher engine speeds optimized for loading performance, while during traveling operations, it switches to a first upper limit that maintains vehicle stability
Solution Approach 2:
The controller changes the engine speed parameter according to operational mode. By detecting non-traveling operations through the operation detecting portion, the system applies a different speed parameter (second upper limit) that expands the engine speed range for loading efficiency, whereas traveling operations use a constrained parameter (first upper limit) for stability
Data Source
Figure 1.
Figure 2
Figure 3
AI summary
A traveling operation detecting portion (39, 40) detects traveling operation and non-traveling operation selectively. The traveling operation corresponds to operator operation that involves traveling of an industrial vehicle (10). The non-traveling operation corresponds to operator operation that does not involve the traveling of the industrial vehicle (10). An upper setting portion (42a-42d) selectively sets a first engine speed upper limit and a second engine speed upper limit, which are different from each other, as an upper limit of an acceptable speed range of an engine (11) in correspondence with a detection result of the traveling operation detecting portion (39, 40). Thus, maximum advantage of the performance of the engine (11) is ensured.in correspondence with operation of the industrial vehicle (10) (Fig. 2).