Integrated Oil and Vacuum Pump Module with Common Drive Shaft
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Solution Overview
Problem
The existing assembly methods for oil pumps and vacuum pumps in internal combustion engines are costly due to the need for separate housings and complex mounting flanges, which increases manufacturing expenses and complicates the assembly process.
Innovation Solution
A combined oil pump and vacuum pump module is created, where both pumps share a common drive shaft and are integrated into a single module, allowing for preassembly and simplified housing design, reducing the need for separate housings and mounting surfaces, and enabling space-saving installation within the engine housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If two separate pump housings with mounting flanges are used for oil pump and vacuum pump, then each pump can be independently mounted, but the manufacturing costs increase due to multiple machined mounting surfaces
Solution Approach 1:
The patent combines the oil pump housing and vacuum pump housing into a single integrated housing structure. The housing contains both pump units with a common mounting flange, eliminating the need for separate housings and multiple mounting surfaces. This merging reduces manufacturing complexity and costs while maintaining the functionality of both pumps.
2Ease of manufacture
If separate drive shafts are used for oil pump and vacuum pump, then each pump can be independently driven, but the assembly complexity and manufacturing costs increase
Solution Approach 1:
The patent employs a common drive shaft that drives both the oil pump and vacuum pump through a shared transmission mechanism. The drive shaft is connected to both pumps via a housing that integrates the drive mechanisms, reducing the number of drive shafts from two to one and simplifying assembly.
3Adaptability or versatility
If multiple mounting surfaces are machined on crankshaft housing, then multiple pumps can be mounted, but the manufacturing precision requirements and costs increase
Solution Approach 1:
The integrated housing serves multiple functions: it houses both the oil pump and vacuum pump, provides a single common mounting flange for mounting the entire assembly to the crankshaft housing, and contains the drive mechanisms for both pumps. This multi-functional design eliminates the need for multiple precision mounting surfaces on the crankshaft housing.
Data Source
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AI summary
An oil-pump and vacuum-pump module for internal combustion engines has an oil pump (11) and a vacuum pump (13). An oil conveying means (16) of the oil pump (11) and an air conveying means (18) of the vacuum pump (13) are arranged on a common drive shaft (14) and are therefore driven jointly via a single shaft. The pump module according to the invention preferably has a common mounting face, with the result that both pumps can be mounted via one mounting face.