Engine Cylinder Cutout Balancing via Electric Motor Mediator
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Solution Overview
Problem
Cylinder cutout in engines leads to excessive noise and vibration due to torsional imbalances, which existing solutions fail to adequately address by merely limiting the magnitude, location, or time of cylinder cutout.
Innovation Solution
A control system that reduces the output of one or more engine cylinders without reducing the output of the remaining cylinders, using an electric motor to supplement power and balance torsional loads, thereby reducing noise and vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If cylinder cutout is implemented to improve engine efficiency during light loading conditions, then fuel efficiency is improved, but excessive noise and vibration occur due to torsional imbalances
Solution Approach 1:
An electric motor is introduced as an intermediary device to counterbalance the torsional imbalances caused by cylinder cutout. The motor provides compensating torque to offset the imbalance forces, allowing cylinder cutout to proceed while maintaining acceptable vibration and noise levels.
Solution Approach 2:
The system dynamically adjusts the operation of individual cylinders based on operating conditions, selectively deactivating specific cylinders while maintaining others. This parameter change in cylinder operation enables efficiency improvements while the electric motor compensates for the resulting imbalances.
2Object-generated harmful factors
If cylinder cutout is limited by magnitude, location, or time restrictions to comply with noise ordinances, then noise and vibration are reduced, but engine efficiency improvements are constrained
Solution Approach 1:
The electric motor serves as a mediator that enables more aggressive cylinder cutout strategies to be implemented without violating noise ordinances. By actively compensating for imbalance forces, the motor allows greater flexibility in cylinder management while maintaining acceptable noise and vibration levels.
Solution Approach 2:
The system transitions from static restrictions on cylinder cutout (fixed magnitude, location, or time limits) to a dynamic approach where the electric motor actively adjusts in real-time to compensate for imbalance forces, enabling more flexible and efficient cylinder 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
Effectively reduces engine noise and vibration to an acceptable level by synchronizing power supplementation from an electric motor with reduced cylinder output, maintaining engine performance and efficiency.
Implementation Method 1
A control system that reduces the output of one or more engine cylinders without reducing the output of the remaining cylinders, using an electric motor to supplement power and balance torsional loads
Data Source
AI summary
The method includes reducing output of one or more cylinders of an engine system without reducing output of the remaining cylinders of the engine system. The method also includes reducing imbalance of the engine system by supplementing the engine system with power in response to the output reduction of the one or more cylinders.