Camshaft Adjustment Control Device Pre-Activation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing camshaft adjustment devices for internal combustion engines require a significant startup time before the engine can be ignited, leading to increased pollutant emissions during the startup phase if the engine is started prematurely.
Innovation Solution
A monitoring circuit with sensors detects state changes in the vehicle, allowing the control device to turn on before the ignition switch is activated, ensuring the camshaft adjustment device is ready to operate simultaneously with ignition, thereby reducing startup time and pollutant emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the control device is turned on with the ignition switch, then the internal combustion engine can start, but the control device requires 50 to 150 milliseconds to complete its boot process, causing a delay in engine startup
Solution Approach 1:
The monitoring circuit detects when the driver approaches or interacts with the vehicle (via sensors detecting brake pedal position, gear stick position, or other driver actions) and activates the control device in advance of the ignition switch being turned on. This preliminary activation allows the control device to complete its boot process before the driver expects the engine to start, eliminating the perceived delay while maintaining battery conservation when the vehicle is not in use.
2Speed
If the internal combustion engine is started before the control device is ready, then immediate engine startup is achieved, but increased pollutant emissions are produced during the startup phase
Solution Approach 1:
By activating the control device in advance through the monitoring circuit, the system ensures that all control functions are ready before the engine starts. This eliminates the need to start the engine before the control device is prepared, allowing immediate startup with full control functionality and minimizing pollutant emissions during the startup phase.
3Reliability
If the control device remains turned on continuously, then the camshaft adjustment device is always ready to operate, but excessive battery energy is consumed
Solution Approach 1:
Instead of keeping the control device continuously on, the monitoring circuit activates it only when needed - specifically when driver presence or driver-related actions are detected. This on-demand activation maintains device readiness when the vehicle is in use while minimizing battery consumption when the vehicle is parked or not being operated.
Solution Approach 2:
The monitoring circuit automatically determines when the control device should be activated based on sensor inputs from driver actions (brake pedal, gear stick, etc.), eliminating the need for manual switching and optimizing the balance between readiness and energy consumption based on actual vehicle usage conditions.
Data Source
AI summary
A device for adjusting the position of the angle of rotation of the camshaft of a reciprocating piston internal combustion engine relative to the crankshaft in a motor vehicle is provided, which includes an adjusting gear mechanism in the form of a triple shaft gear mechanism having a drive shaft fixed to the crankshaft, an output shaft fixed to the camshaft and an adjustment shaft which is drivingly connected to an electric motor which can be positioned using an electric control device. The ignition of the internal combustion engine is connected to the motor vehicle battery via an ignition switch. The motor vehicle also includes at least one device which can be adjusted by a user of the vehicle. A monitoring circuit provided with at least one sensor for detecting a change of state of the at least one device. The monitoring circuit is connected to the control device when the latter is switched off, such that the control device is switched on when a change in state is detected.