Clutch Control Device Dynamic Capacity Adjustment
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Solution Overview
Problem
Mechanical type slipper clutches in vehicles cannot freely vary clutch capacity based on vehicle state, leading to suboptimal performance and abrupt engine braking due to constant clutch capacity during slippage, especially when engine rotational speed is low relative to vehicle speed.
Innovation Solution
A clutch control device and system that includes sensors for engine rotational speed, throttle opening angle, bank angle, and gear position, with a controller calculating an estimated engine torque and adjusting clutch capacity accordingly to optimize clutch performance based on vehicle state, using a clutch actuator to vary clutch capacity and a control target value map for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mechanical type slipper clutch with constant clutch capacity is used, then the structure is simple, but the clutch capacity cannot be freely varied according to vehicle state, leading to suboptimal performance
Solution Approach 1:
The patent transforms the static mechanical slipper clutch into a dynamic controlled system where clutch capacity can be varied in real-time based on vehicle state. The clutch actuator dynamically adjusts the clutch capacity according to detected parameters (engine rotational speed, vehicle speed, throttle opening) to optimize performance under different operating conditions.
Solution Approach 2:
The control system implements feedback by detecting vehicle state parameters (engine rotational speed, vehicle speed, throttle opening angle) and using this information to calculate and adjust the clutch capacity. The controller continuously monitors the difference between actual and target clutch capacities and adjusts the actuator accordingly to maintain optimal clutch performance.
2Object-generated harmful factors
If clutch capacity is constant during slippage, then the mechanical structure is simple, but abrupt engine braking is generated when engine rotational number is low relative to vehicle speed
Solution Approach 1:
The control system prevents abrupt engine braking by proactively adjusting clutch capacity before the harmful condition occurs. When the controller detects that engine rotational speed is low relative to vehicle speed, it preemptively modifies the clutch capacity to reduce the torque difference, thereby preventing the abrupt engine braking effect before it can manifest.
Solution Approach 2:
The patent changes the clutch capacity parameter dynamically based on the relationship between engine rotational speed and vehicle speed. By adjusting this key parameter in real-time, the system prevents the condition where constant clutch capacity would cause abrupt engine braking, smoothing the torque transmission and eliminating the harmful effect.
3Stability of the object's composition
If clutch capacity is increased to maintain engine rotational number, then vehicle speed stability is improved, but clutch operation complexity increases
Solution Approach 1:
The clutch control system operates autonomously without requiring manual intervention. The controller automatically detects vehicle state parameters, calculates the appropriate clutch capacity, and adjusts the clutch actuator accordingly. This self-service capability maintains vehicle speed stability while eliminating the need for complex manual clutch operation by the driver.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables optimal clutch capacity output by varying clutch capacity according to vehicle state, reducing abrupt engine braking and maintaining consistent torque transmission, thereby improving vehicle stability and performance.
Implementation Method 1
a clutch actuator configured to drive the clutch device and vary a clutch capacity
Implementation Method 2
operated by a centrifugal force to release the engagement when the rotational number of the clutch center exceeds the threshold value
Implementation Method 3
a friction torque of an engine (a force applied in a direction in which the engine rotational number is decreased)
Data Source
AI summary
A clutch control device includes an engine, a gearbox, a clutch device configured to disconnect and connect power transmission between the engine and the gearbox, a clutch actuator configured to drive the clutch device and vary a clutch capacity, an engine rotational number sensor configured to detect an engine rotational number, a throttle opening angle sensor configured to detect a throttle opening angle, and a controller configured to calculate a control target value of the clutch capacity, wherein the controller calculates an estimated engine torque and causes the clutch device to change a slip clutch capacity according to the estimated engine torque.