Compressor Suction Air Conduit Throttle Flap for Idle Power Loss
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Solution Overview
Problem
Compressor systems driven by vehicle drive motors, which utilize precompressed air from turbochargers, experience high power losses during idling phases due to continuous air delivery, leading to inefficient energy consumption and increased oil consumption.
Innovation Solution
A mechanism is introduced in the suction air conduit to reduce the flow cross section, allowing for adjustable backpressure control, which limits the charging pressure supplied to the compressor, particularly during idling phases, using actuatable components like throttle flaps, pneumatic working cylinders, and electrically activatable valves to manage the flow cross section and charging pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the compressor draws in precompressed air from the turbocharger, then the air volume delivered is significantly enhanced and efficiency is improved, but the power loss in idle phase is significantly higher
Solution Approach 1:
The patent applies a dynamically adjustable flow cross-section mechanism (throttle flap) in the suction air conduit that can adapt its opening degree based on operating conditions. During idle phase, the throttle flap reduces the flow cross-section to limit charging pressure and minimize air delivery volume, thereby reducing power loss. During operation, the throttle flap opens to allow full precompressed air flow for maximum productivity. This dynamic adjustment resolves the contradiction between high air volume delivery and low idle power loss.
2Adaptability or versatility
If the mechanism for reducing flow cross section is actuated by a pneumatic working cylinder, then rapid and precise adaptation of charging pressure is achieved, but the device complexity increases
Solution Approach 1:
The patent employs a pneumatic working cylinder to actuate the throttle flap mechanism. The working cylinder receives controlled pneumatic pressure through valves to adjust the throttle flap position, enabling rapid and precise adaptation of the flow cross-section and consequently the charging pressure supplied to the compressor. This pneumatic actuation system provides smooth, controllable, and responsive pressure regulation while maintaining relatively simple mechanical construction compared to alternative actuation methods.
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
This solution reduces power consumption and oil ejection during idling phases by minimizing air delivery volume and maintaining low oil discharge, while ensuring efficient operation by adapting charging pressure based on operating conditions, thus matching the efficiency of conventional compressors.
Implementation Method 1
by way of the backpressure produced, to achieve any desired reduction in the charging pressure supplied to the pressure-charged compressor
Implementation Method 2
Examples of mechanisms that can be used for reducing the flow cross section are a throttle flap
Implementation Method 3
provision is made for the mechanism for reducing the flow cross section to be actuable mechanically by a pneumatic working cylinder
Data Source
AI summary
A compressor system for a vehicle includes a compressor driven by a drive motor of the vehicle and a suction air conduit for supplying air that has already been precompressed by a turbocharger of the drive motor to the compressor. A mechanism is disposed in the suction air guide for reducing the flow cross-section. The mechanism is able to limit the charging pressure of the already precompressed air supplied to the compressor. A method for controlling a compressor system having a turbocharged compressor limits a charging pressure of the already precompressed air to an adjustable maximum value.