Idling Stop Adjustment via Closed-Loop Control Switching
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Solution Overview
Problem
Existing combustion engines lack an efficient method to easily set the idling stop, which restricts the ability to regulate idling speed above a maximum rotational speed, and there is a need for a diagnostic arrangement and method to simplify this process.
Innovation Solution
A combustion engine with a fuel supply unit, ignition unit, adjustable throttle element, and a controller with a closed-loop control unit that can be switched off during idling, allowing for adjustment of the idling stop to achieve a set-point rotational speed, along with a diagnostic unit for evaluating and displaying the necessary adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the closed-loop control unit is activated to regulate rotational speed during idling, then the rotational speed remains constant, but the idling stop cannot be set above a rotational speed maximum
Solution Approach 1:
The control unit is designed to be dynamically switchable between active and inactive states. During normal operation, the closed-loop control is active to maintain constant rotational speed. During idling stop adjustment, the control is deactivated to allow free adjustment above maximum rotational speed, then reactivated afterward to restore speed stability.
2Adaptability or versatility
If the idling stop is adjusted to achieve a defined operating point, then the rotational speed can be set, but additional hardware and complex adjustment procedures are required
Solution Approach 1:
The diagnostic unit utilizes existing sensors and control unit capabilities to perform automatic evaluation and guidance of the idling stop adjustment process. The system self-evaluates rotational speed values and provides guidance information to the operator, eliminating the need for additional measurement hardware and simplifying the adjustment procedure through automated feedback.
Data Source
AI summary
A combustion engine has a fuel supply unit, an ignition unit and a controller controlling the amount of fuel and the ignition time. An adjustable throttle element controlling the amount of combustion air to the engine and an adjustable idling stop for the throttle element are provided. The controller includes a regulating unit regulating the rotational speed of the motor to a set-point rotational speed (nsoll) when idling. To adjust the idling stop, the regulating unit is switched off when idling. A diagnostic unit switches off the regulating unit. A method for adjusting a combustion engines provides that the regulating unit is switched off, the amount of fuel supplied is adjusted during idling and a rotational speed is evaluated, and that on the basis of the rotational speed value, it is determined how the idling stop is to be adjusted to reach a set-point rotational speed maximum (nsollmax).