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Warming up is essential for the engine's performance as well as life. Engine warmup basically relates to setting the initial levels of oil and coolant in the engine parts. Many drivers are into the habit of accelerating the vehicle on startup which may lead to damaging of engine parts. To prevent this damage, the software algorithm for engine warm up does not allow the engine to respond to any acceleration...
To develop a control strategy for a vehicle, the most important factors are to minimize the cost in terms of time and resources, and availability of a risk-free test environment to test new strategies. This paper presents the strategy for developing control-based models for a plug-in hybrid vehicle. The resulting vehicle model will allow development of advanced supervisory control strategies for the...
This paper presents the methodology and utility of an HEV plant model using Matlab-Simulink for testing the HCU (Hybrid control Unit) logics in dSPACE Hardware-in-loop environment. It also describes how requirements related to Hybrid Controller testing are addressed using the subject plant model. It further discuss about the requirements for Inputs to hybrid controller that are modeled in close loop...
To provide a high starting torque and to work under a high rpm range are the design requirements for the integrated startgenerators (ISG) used for intelligent vehicles with hybrid powertrains. However, meeting with both of these two requirements usually involves with sophisticated motor and controller design and high manufacturing cost. Hence, a transmission with variable reduction ratio is desired...
Vehicle hybridization offers the opportunity to eliminate conventional engine starters in favor of e-motor engine start, i.e. using the hybrid's electric traction motor, ‘e-motor’, to start the engine. The advantages of e-motor engine start are many: 1) A freight efficiency gain of about 1% can be achieved by eliminating the starter and extra Pb-acid battery weight in a heavy-duty vehicle† 2) Less...
As a selected participant in the EcoCAR2: Plugging In to the Future competition, headline sponsored by General Motors and the US Department of Energy, the Rose-Hulman team has completed the second year of a three year design cycle. This paper focuses on the supervisory control system design completed during year one of the competition including plant model development, control system hardware architecture,...
To acquire real loads of wheel loader transmission and to develop dynamics simulation and to analyze machine power for different user, a complete test program and a method of processing signal are proposed. In this article, the transmission torque of wheel loader are tested with the method of four sections per cycle in “V-type” routes. The original signals are filtered by low-passed filter and are...
To reduce the development cycle time and cost of the transmission control unit (TCU) for automated manual transmission (AMT), a rapid testing platform (RTP) based on the concept of hardware-in-the-loop simulation is introduced and implemented in this paper. The proposed RTP features that the vehicle parts in simulation are all model-based. The torque characteristic of engine, the mechanical characteristic...
This paper deals with an integrated starter-alternator (ISA) drive which exhibits a high torque for the engine start, a wide constant-power speed range for the engine speedup, and a high-speed generator mode operation for electric energy generation. Peculiarities of this ISA drive are thus its flux-weakening capability and the possibility to large torque overload at low speed. The focus on the design,...
Automobile driveline test system is used to test and study the driveline components and assembly (DCA). This paper introduces the structure and principle of the test system, illuminates the application of frequency conversion technology in the test of the DCA. The drive system commands the drive motor to produce the necessary speed (RPM) and torque to simulate engine power. The actual driving resistances...
A transient, six-cylinder diesel engine model for cold test has been developed for analyzing the engine fault through the engine torque curve. The model is based on physically working cycle, thermodynamic theory and dynamics mechanism. The simulation of this model, implemented on Matlab/Simulink, can not only achieve engine faults detection before hot test, but also indicate different causes of engine...
In the automotive press, there are lots of benchmarks. Acceleration from 0 to 100 km/h or 0 to 60 mph is a frequently used benchmark. But how often do you accelerate as fast as possible from 0 to 100 km/h? Similarly is the power and the torque of the engine benchmarked, but rarely it is noticed whether the power is delivered at revs which are useful in my daily driving or at top revs. And I rarely...
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