Electric Engine Braking Device Using Mechanical Linkage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing engine braking systems relying on engine oil as a medium face limitations due to temperature and viscosity issues, leading to unstable performance, restricted operating conditions, and prolonged braking intervention times.
Innovation Solution
An electric engine braking device with a rocker arm shaft, camshaft, exhaust valves, and an auxiliary rocker arm, utilizing an electric driving mechanism that includes a rotary motor, sliding plate, and contact leaf spring to control the engine braking function, eliminating the need for engine oil as a medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If engine oil is used as a medium for transmitting motion in the valve control mechanism, then the braking function can be realized, but the operating conditions are restricted due to temperature and viscosity limitations
Solution Approach 1:
The patent replaces the hydraulic oil-based transmission system with a direct mechanical linkage system. The valve auxiliary control unit uses mechanical components (linkage rods, pivots, and cam mechanisms) to transmit motion directly from the camshaft to the exhaust valve, eliminating the need for engine oil as a transmission medium and thereby removing temperature and viscosity constraints on braking operation.
Solution Approach 2:
The patent extracts and removes the hydraulic oil transmission system from the valve control mechanism. By taking out the oil-based hydraulic system and replacing it with pure mechanical linkages, the design eliminates the harmful effects of oil viscosity and temperature limitations, allowing reliable braking operation across a wider range of operating conditions.
2Speed
If engine oil is used as a driving medium for the braking mechanism, then the braking function can be activated, but the response time is prolonged
Solution Approach 1:
The patent replaces the hydraulic oil transmission system with a direct mechanical linkage system. The valve auxiliary control unit uses mechanical components (linkage rods, pivots, and cam mechanisms) to transmit motion directly from the camshaft to the exhaust valve, eliminating the need for engine oil as a transmission medium and thereby removing temperature and viscosity constraints on braking operation.
Solution Approach 2:
The patent implements a direct mechanical transmission path that skips the intermediate hydraulic oil transmission step. The mechanical linkage directly connects the camshaft motion to the valve actuation, eliminating the time delay associated with oil pressure buildup and fluid transmission, thereby achieving faster braking response.
3Use of energy by moving object
If engine oil is used as a medium for valve control, then the braking mechanism can operate, but fuel consumption increases due to oil pump requirements
Solution Approach 1:
The patent extracts and removes the hydraulic oil transmission system from the valve control mechanism. By taking out the oil-based hydraulic system and replacing it with pure mechanical linkages, the design eliminates the harmful effects of oil viscosity and temperature limitations, allowing reliable braking operation across a wider range of operating conditions.
Solution Approach 2:
The patent replaces the hydraulic oil transmission system with a direct mechanical linkage system. The valve auxiliary control unit uses mechanical components (linkage rods, pivots, and cam mechanisms) to transmit motion directly from the camshaft to the exhaust valve, eliminating the need for engine oil as a transmission medium and thereby removing temperature and viscosity constraints on braking operation.
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 enhances reliability by avoiding oil-related issues, allows engine braking at any time, significantly reduces braking entry and exit times, and decreases fuel consumption by eliminating the need for engine oil as a driving medium.
Implementation Method 1
an elastic element capable of pressing the auxiliary rocker arm into contact with the auxiliary cam
Implementation Method 2
a contact leaf spring mounted on the sliding plate and correspondingly contacts with the execution plunger
Implementation Method 3
the first elastic piece can drive the sliding block to move downwards and enable the second transverse hole to coincide with the first transverse hole
Implementation Method 4
the second elastic piece can drive the transfer plunger to move towards one end of the execution plunger and enable an end face to be flush with an end face of the second transverse hole
Implementation Method 5
an electric driving mechanism comprising an execution motor, a sliding plate frame, a sliding plate and a contact leaf spring, wherein the sliding plate frame is provided above the auxiliary rocker arm, the sliding plate is provided in parallel with the rocker arm shaft and is slidably provided on the sliding plate frame
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
An electric engine braking device comprises a control mechanism (8) and an electric driving mechanism (9), wherein the control mechanism (8) comprises a housing (81), an execution plunger (82) and a sliding assembly; the sliding assembly comprises a sliding block (83), a first elastic piece (84), a transfer plunger (85) and a second elastic piece (86); the transfer plunger (85) comprises a first position which is completely provided in the sliding block (83) and a second position which extends out of the sliding block (83) to connect the sliding block (83) and the housing (81) into a whole; and the electric driving mechanism (9) comprises an execution motor (91), a sliding plate frame (92), a sliding plate (93) and a contact leaf spring (94), the execution motor (91) can push the sliding plate (93) to slide along the sliding plate frame (92), drive the contact leaf spring (94) to push the execution plunger (82) to slide, and drive the transfer plunger (85) to move and keep the transfer plunger at the second position. The invention has the advantages that the electric driving mechanism (9) and the control mechanism (8) are provided, and the action is controlled by an execution motor (91) to replace the existing engine oil used as a working or driving control medium. The reliability risk caused by the engine oil is eliminated, the engine braking use area is increased, the engine braking entry and exit time is reduced, the fuel consumption is reduced, and the engine braking performance grading is more refined.