scholarly journals Tool Evaluation & Design Analysis for Parking Pawl Mechanism

2021 ◽  
Vol 9 (8) ◽  
pp. 1396-1403
Author(s):  
Amit R. Patil
Keyword(s):  
Electric Vehicles ◽  
Automatic Transmission ◽  
Rear Wheel ◽  
Front Wheel ◽  
Tool Evaluation ◽  
Automatic Transmissions ◽  
Vehicle Variant ◽  
Wheel Drive ◽  
Body Dynamics ◽  
Multi Body

Abstract: Automatic Transmissions in vehicles are becoming the norm today and with the need to reduce fuel consumption, electric vehicles are increasing in number too. As the vehicles get smarter, transmissions have also felt the need to adapt so as to cope with the demands of the 21st century. Apart from providing the user with different driving modes, vehicles with an Automatic Transmission and electric vehicles have a device called a Park Lock. Park Lock Mechanisms are devices that are fitted to vehicles with an automatic transmission or electric vehicles which can secure the vehicle mechanically in addition to the parking brakes to prevent an unintended movement of the vehicle when the vehicle is brought to a stop. This system can face various kinds of loads coming from the transmission or from the wheel side. So, it is necessary to design a system which can withstand against it. Today, when a park lock mechanism is designed, it is designed in a way that it not only fits one vehicle variant but many variants (these variants can include either front wheel drive, rear wheel drive, vehicles with varying final gear to park lock gear ratios etc). Therefore, one Park Lock Mechanism needs to satisfy various conditions and requirements. Carrying out calculations with different notations for each variant becomes a cumbersome procedure, therefore it is prudent to have one common platform which can do the calculation in the early phases of design. In this paper, a closed form calculationsbased Excel VBA tool can able to estimate the loads coming on to the Park lock mechanism by doing some background calculation is presented followed by the simulation performed using Multi Body Dynamics software (‘ADAMS’). Results from MBD tool and a 1D tool are corelated to the test data to gain some confidence on the tool which created in Excel VBA. Keywords: Park Lock Mechanism, ADAMS, 1D Tool, Excel VBA, Drop in Speed, Torque Build up.

scholarly journals A Motor-Integrated Parallel Hybrid Transmission

2004 ◽  
Vol 126 (5) ◽  
pp. 889-894 ◽  
Author(s):  
L. W. Tsai ◽  
G. Schultz
Keyword(s):  
Electric Vehicles ◽  
Power Flow ◽  
Hybrid Electric Vehicles ◽  
Automatic Transmission ◽  
Rear Wheel ◽  
Front Wheel ◽  
Wheel Drive ◽  
Parallel Hybrid ◽  
Hybrid Transmission ◽  
Hybrid Electric

This paper presents a motor-integrated transmission mechanism for use in parallel hybrid electric vehicles. The transmission can provide five basic modes of operation that can be further classified into sixteen sub-modes: one electric motor mode, four engine modes, four engine/charge modes, three power modes, and four regenerative braking modes. Each of these sub-modes can be grouped into like clutching conditions, providing the functional appearance of a conventional 4-speed automatic transmission, with electric launch, engine-only, engine/charge, power-assist, and regeneration capability. CVT capability is provided with one of the engine/charge modes. The kinematics, static torque, and power flow relations for each mode are analyzed in detail. Finally, a clutching logic and a notional control strategy are developed. The transmission can be incorporated not only in front-wheel drive but also in rear-wheel drive vehicles. The compactness, mechanical simplicity, and operational flexibility of the transmission make it an excellent candidate for future hybrid electric vehicles.

scholarly journals Root cause identification and physics of impact-induced driveline noise in vehicular powertrain systems

2005 ◽  
Vol 219 (11) ◽  
pp. 1303-1319 ◽  
Author(s):  
S Theodossiades ◽  
M Gnanakumarr ◽  
H Rahnejat
Keyword(s):  
Rear Wheel ◽  
Experimental Investigations ◽  
Root Cause ◽  
Wheel Drive ◽  
Body Dynamics ◽  
Parametric Studies ◽  
Root Cause Identification ◽  
Multi Body ◽  
Experimental Rig ◽  
Shed Light

Numerical and experimental investigations shed light on the root causes leading to the emergence and persistence of an acute metallic noise in rear wheel drive light truck drivelines. Sudden demands in engine output torque combined with the presence of lash zones give rise to a phenomenon that is onomatopoeically referred to as clonk. Its multi physics nature requires a comprehensive study, which includes rigid multi-body dynamics, flexible body oscillations, and noise radiation computation. The verification of numerical results is achieved through the design and implementation of a transient dynamic experimental rig, which comprises the complete drivetrain from the engine flywheel to the rear axle. Parametric studies reveal high-frequency contributions in the driveline vibration response of certain structural modes of the driveshaft pieces, which are induced by remote impact of meshing transmission teeth through backlash. The numerically predicted spectrum of vibration is in good qualitative agreement with the experimental measurements. Combined study of the aforementioned results reveals the components that amplify the clonk noise.

Analyses of the Relations Between Driving Types and Regenerative Braking in Electric Vehicles

2014 ◽  
Vol 926-930 ◽  
pp. 896-900
Author(s):  
Jin Long Liu ◽  
Zhi Wei Gao ◽  
Jing Ming Zhang
Keyword(s):  
Distribution Coefficient ◽  
Electric Vehicles ◽  
Theoretical Models ◽  
Rear Wheel ◽  
Front Wheel ◽  
Regenerative Braking ◽  
Force Distribution ◽  
Wheel Drive ◽  
Braking Force ◽  
Four Wheel Drive

The relations between Electric Vehicle (EV) drive arrangement and efficiency of regenerative braking were discussed. Firstly, conclusions were concluded according to the analyses of theoretical models. And then the validity of conclusions was proved by the simulations basing on the software of MATLAB/SIMULINK. The results indicate that the EV with four-wheel drive (4WD) pattern has the highest efficiency in regenerative braking mode. It also shows that whether the EV with front-wheel drive (FWD) pattern has higher efficiency than the EV with rear-wheel drive (RWD) pattern in regenerative braking mode depends on the braking force distribution coefficient.

Study and Simulation on Truck Front Suspension Using ADAMS

2013 ◽  
Vol 433-435 ◽  
pp. 2235-2238
Author(s):  
Wei Ning Bao
Keyword(s):  
System Dynamics ◽  
Mechanical System ◽  
Steering System ◽  
Front Wheel ◽  
System Model ◽  
Simulation Test ◽  
Front Suspension ◽  
Body Dynamics ◽  
Wheel Alignment ◽  
Multi Body

The mechanical system dynamics software,ADAMS,is used to establish multi-body dynamics system model for a truck front suspension and steering system. Through the simulation test of wheel travel, front wheel alignment parameters changing along with the wheel travel was obtained.

Modeling and Kinematics Simulation Analyze of Conventional Suspension with Double Trailing Arms for Light Off-Road Vehicles

2013 ◽  
Vol 312 ◽  
pp. 673-678 ◽  
Author(s):  
Rui Ling Wang ◽  
Jian Zhu Zhao ◽  
Guo Ye Wang ◽  
Xiao Kai Chen ◽  
Liang Li
Keyword(s):  
Working Conditions ◽  
Vertical Plane ◽  
Front Wheel ◽  
Road Vehicles ◽  
Steering Angle ◽  
Helical Springs ◽  
Kinematics Simulation ◽  
Body Dynamics ◽  
Suspension Model ◽  
Multi Body

To study the kinematics characteristics of conventional suspension with double trailing arms for light off-road vehicles, suspension model of a light off-road vehicle was established on multi-body dynamics software ADAMS/View, which has double trailing arms and helical springs, and make the suspension kinematics simulation for getting the caster angle and front-wheel steering angle curves on different working conditions. The results show that the double trailing arm lengths, the angles between double trailing arms and horizontal plane/vertical plane, bushing stiffness of the double trailing arms linking with frame are main parameters that affect the caster angle and front-wheel steering angle. The suspension model is rational.

Kinematics Characteristic Analysis and Structural Parameter Optimization of Twist Beam Rear Suspension

2011 ◽  
Vol 201-203 ◽  
pp. 1710-1713
Author(s):  
Ai Hua Tang ◽  
Jian Ping Tian ◽  
Xiao Xu Liu
Keyword(s):  
Linear Method ◽  
Rear Wheel ◽  
Structural Parameter ◽  
Optimized Design ◽  
Kinematics Analysis ◽  
Structural Behaviour ◽  
Characteristic Analysis ◽  
Rear Suspension ◽  
Body Dynamics ◽  
Multi Body

The multi-body dynamics analysis is an important method to analyze the movement and dynamics characteristics of a car in modern vehicle design process . The twist beam rear suspension which is for rear wheel steering was widely equipped on front engine rear wheel drive vehicles . The modeling of twist beam rear suspensions is always difficult to describe accurately for its unique structural behaviour . First of all , a non-linear method based on multi-body dynamics was used to establish the dynamics model of the twist beam rear suspension system by using the ADAMS/Car . Secondly, the kinematics analysis of the rear suspension was realized and the main suspension parameters (toe angle, camber angle and wheel base) were calculated by changing wheel travel by means of ADAMS/Car . Finally , the suspension was optimized . The result shows that integrative use of ADAMS/Car and ADAMS/Insight in the kinematics analysis and optimized design of the suspensions is rapidly and effectively to design vehicle suspensions .

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