Thermal Expanding Member Additive Dispensing Filter
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Solution Overview
Problem
Motor oil additives in internal combustion engines undergo thermal and mechanical degradation, leading to depletion and inability to suspend soot particles effectively, resulting in sludge and acid formation, which conventional filters fail to address adequately.
Innovation Solution
A thermally activated additive dispensing filter with a reservoir and metering valve system, utilizing a thermal expanding member to control pressure and dispense additives into the oil flow path, ensuring continuous soot particle suspension and extended filter functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional filters are used, then the structure is simple, but the additive replenishment function is insufficient and the useful life of motor oil is short
Solution Approach 1:
The patent combines the filter element with an additive dispensing device, merging the filtration function and additive replenishment function into a single integrated unit. The dispensing device includes a reservoir, metering valve, and thermal expanding member that work together to automatically dispense additive into the motor oil flow, eliminating the need for separate additive injection systems and extending motor oil life without requiring complex external systems
Solution Approach 2:
The thermal expanding member automatically responds to temperature changes in the motor oil to activate the dispensing mechanism. When the oil temperature reaches a threshold, the thermal expansion triggers the metering valve to dispense additive, and when the temperature drops, the member contracts to stop dispensing. This self-regulating mechanism eliminates the need for external temperature sensors or control systems, maintaining simplicity while enabling automatic additive replenishment
2Reliability
If additives are not replenished, then the device structure is simple, but the additives undergo thermal and mechanical degradation leading to depletion
Solution Approach 1:
The dispensing device enables continuous replenishment of additives into the motor oil flow throughout the oil's service life. The thermal expanding member continuously monitors temperature and triggers periodic dispensing cycles, ensuring that additives are constantly replenished as they degrade, rather than being depleted after a single use. This continuous action maintains reliable additive effectiveness from the start of oil life until replacement
Solution Approach 2:
The thermal expanding member responds to changes in temperature parameters to control the dispensing rate and timing of additives. As motor oil temperature varies during engine operation, the thermal expansion/contraction of the member adjusts the pressure differential across the metering valve, thereby regulating the flow rate of additive dispensing to match the degradation rate of existing additives in the oil
3Extent of automation
If a thermal expanding member is used to control pressure, then the additive dispensing is automated, but the device complexity increases
Solution Approach 1:
The patent replaces complex electronic or mechanical control systems with a purely thermal expansion-based actuation mechanism. The thermal expanding member uses thermal energy from the motor oil to directly drive the metering valve through pressure differential changes, eliminating the need for motors, sensors, electronics, or complex mechanical linkages. This substitution achieves full automation of additive dispensing control while keeping the mechanism remarkably simple
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
The solution prolongs the useful life of motor oil by continuously dispensing additives and effectively removing soot particles over a longer period, protecting the engine from sludge and related issues.
Implementation Method 1
The thermal expanding member is configured to expand and contract between an expanded position and a contracted position, respectively, in response to temperature
Data Source
AI summary
An additive dispensing device is provided. The additive dispensing device includes a reservoir configured to contain a supply of an additive. The reservoir is in fluid communication with a dispensing chamber of a metering valve device by a first one-way valve. The metering valve device is configured to dispense a portion of the additive from the dispensing chamber into a housing by a second one-way valve. The additive dispensing device further includes a thermal expanding member disposed in the dispensing chamber. The thermal expanding member is configured to expand and contract between expanded and contracted positions, respectively, in response to temperature. The thermal expanding member decreases a pressure in the dispensing chamber as the thermal expanding member moves toward the contracted position, such that additive is drawn from the reservoir into the dispensing chamber through the first one-way valve. The thermal expanding member increases the pressure in the dispensing chamber as the thermal expanding member moves toward the expanded position, such that additive previously drawn from the reservoir chamber into the dispensing chamber is dispensed through the second one-way valve.