Vehicle Heat Source Control for Efficient Heater Core Supply
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional control devices for vehicles inefficiently manage heat generation, often supplying either excessive or insufficient heat to heat-consuming devices due to uniform heat increase control, regardless of the devices' specific heat requirements.
Innovation Solution
A control device comprising a heat source control section, a necessary heat calculating section, a heat supply estimating section, and a heat generation increase requesting section, which calculates and estimates the required and suppliable heat quantities to determine if heat generation should be increased, thereby ensuring efficient and adequate heat supply to heat-consuming devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform heat generation increase control is applied regardless of heat consuming device requirements, then heating performance is maintained, but heat use efficiency deteriorates due to excessive or insufficient heat supply
Solution Approach 1:
The control device changes operational parameters based on the specific heat requirements of different consuming devices. It adjusts engine operating conditions (such as load, speed, injection timing) according to the calculated necessary heat quantity and the suppliable heat quantity, rather than applying uniform heat generation increase control. This resolves the contradiction by dynamically optimizing parameters to match actual heat demands.
Solution Approach 2:
The system transitions from static uniform heat generation control to dynamic adaptive control. The control device continuously calculates necessary heat quantity based on operating conditions and device requirements, estimates suppliable heat quantity, and adjusts engine operation in real-time. This dynamic approach ensures heating performance while optimizing heat use efficiency by matching supply with demand.
2Reliability
If heat generation increase control is applied based only on coolant temperature and increase rate, then heating performance is maintained, but heat use efficiency deteriorates due to lack of consideration for actual heat requirements
Solution Approach 1:
The control device implements a feedback mechanism where it calculates the necessary heat quantity based on operating conditions and device requirements, compares it with the estimated suppliable heat quantity, and adjusts engine operation accordingly. This feedback loop ensures that heat generation increase control is applied only when and where needed, resolving the contradiction between maintaining heating performance and improving heat use efficiency.
3Quantity of substance
If engine idle speed is raised and ignition timing is retarded to increase heat generation, then heat supply quantity increases, but energy consumption increases
Solution Approach 1:
The control device applies partial action by increasing heat generation only to the extent necessary to meet the calculated heat requirements. Rather than continuously raising idle speed and retarding ignition timing, it applies these controls selectively based on the difference between necessary heat quantity and suppliable heat quantity, thus resolving the contradiction between heat supply quantity and energy consumption.
Data Source
AI summary
By employing a heat source control section that controls the operating state of an internal combustion engine mounted in a vehicle, a necessary heat calculating section that calculates the engine coolant temperature needed by a heater core, which consumes the heat supplied from the engine through engine coolant water, and the time at which this engine coolant temperature becomes necessary, a heat supply estimating section that estimates engine coolant temperature at the aforementioned time in a case in which the engine is operated continuously in the current operating state, and a heat generation increase requesting section that requests the heat source control section to increase heat generation quantity of the engine when the engine coolant temperature estimated by the heat supply estimating section is less than the engine coolant temperature calculated by the necessary heat calculating section, the heat necessary for the heater core is supplied more efficiently and adequately.