Topic
Direct TPMS
About: Direct TPMS is a research topic. Over the lifetime, 17 publications have been published within this topic receiving 100 citations.
Papers
1 Jan 2007
TL;DR: All passenger cars and trucks in the United States are required to have tire-pressure monitoring systems (TPMSs), a driver-assist system that warns the driver when the tire pressure is below or above the prescribed limits.
Abstract: Proper tire inflation pressure improves fuel economy, reduces braking distance, improves handling, and increases tire life, while underinflation creates overheating and can lead to accidents. Approximately 3/4 of all automobiles operate with at least one underinflated tire [1]. The main causes of underinflation are natural leakage, temperature changes, and road hazards [2]. Drivers typically do not check tire pressure unless they notice unusual vehicle performance. Visual checks are often insufficient to determine underinflation. In 2000, the U.S. Transportation Recall Enhancement, Accountability, and Documentation Act (TREAD) requested that the National Highway Transport Safety Authority (NHTSA) investigate the implementation of a pressuredrop warning system on vehicles. Beginning with 2006 models, all passenger cars and trucks in the United States are required to have tire-pressure monitoring systems (TPMSs) [3]. A TPMS is a driver-assist system that warns the driver when the tire pressure is below or above the prescribed limits. TPMSs are classified into two categories, namely, direct and indirect. In direct TPMSs, the pressure drop is calculated based on actual pressure measurements through sensors. In contrast, measurements such as wheel speed are used in indirect TPMSs. A direct TPMS can inform the driver about pressure deviations as low as ±0.1 bar, that is, ±1.45 psi. The following sections explain these types of TPMS in detail.
52 citations
Patent•
26 Aug 2002
TL;DR: In this paper, a direct tire pressure sensor unit is mounted in each wheel and the existing ABS wheel sensor units are modified to receive transmission signals from the direct pressure sensors, which is used to couple the received signals to the existing central ABS computer.
Abstract: Tire pressure sensors are combined with an ABS to obtain a very low cost direct TPMS. A direct tire pressure sensor unit is mounted in each wheel and the existing ABS wheel sensor units are modified to receive transmission signals from the direct pressure sensors. The existing ABS wheel sensor vehicle wiring is used to couple the received signals to the existing central ABS computer. The central ABS computer software is modified to process these received signals and calculate tire pressure information. This information is displayed using a TPMS display symbol.
15 citations
1 Jan 2013
TL;DR: In this article, an overview of the requirements and status of tire pressure monitoring systems (TPMS) in view of MEMS sensors and the corresponding electronics is given. And the use of energy harvesters as potential power sources for future TPMS systems, as well as requirements and advantages of tire integrated TPMS system, are discussed.
Abstract: This chapter gives an overview of the requirements and status of tire pressure monitoring systems (TPMS) in view of MEMS sensors and the corresponding electronics. TPMS has become a nature market due to mandatory legal regulations for light vehicles in the USA. MEMS-based pressure sensors are used in the vast majority of so-called direct TPMS systems. After an introduction to the different processes of MEMS pressure sensors as well as the detection schemesthe power management of TPMS is discussed in detail. In addition, the use of energy harvesters as potential power sources for future TPMS systems, as well as the requirements and advantages of tire integrated TPMS systems, are discussed.
10 citations
Patent•
7 Nov 2014
TL;DR: In this paper, an improved method for a passenger car tire pressure monitoring system (TPMS), including improvements of a direct TPMS or an indirect TPMS technique, is presented, including compensations and corrections for wheel speed distortions caused by the tire wear in use.
Abstract: An improved method for a passenger car tire pressure monitoring system (TPMS), including improvements of a direct TPMS or an indirect TPMS technique. The direct TPMS uses a dynamic tire pressure reference as a tire pressure determination basis, and monitors the real-time tire load, e.g., when the wheel load changes, the TPMS data processing center takes the tire cold inflation pressure data corresponding to the real-time load as the current tire pressure reference, and performs determinations and warnings for the real-time tire pressure data. The indirect TPMS establishes a wheel speed reference database based on a vehicle speed reference, and conducts compensations and corrections for wheel speed distortions caused by the tire wear in use, and performs an analysis and comparison between the compensated and modified real-time wheel speed and the data from the wheel speed reference database, and makes a real-time tire pressure information indication or warning.
7 citations
Patent•
7 Oct 2013TL;DR: In this article, the authors proposed a method for combining direct tire pressure monitoring systems (TPMS) and tire resonance analysis in indirect TPMS for the extraction of tire characteristics to characterize other tire parameters.
Abstract: Embodiments relate to tire characterization systems and methods for combining direct tire pressure monitoring systems (TPMS) and tire resonance analysis in indirect tire pressure monitoring systems (TPMS) for the extraction of tire characteristics to characterize other tire parameters. In embodiments, iTPMS and methods that utilize anti-lock braking system (ABS) sensed signals coupled to an electronic control unit (ECU) that may comprise circuitry and/or controllers to process the sensed signals using a resonance frequency analysis (RFA) technique can be combined with direct tire pressure sensor measurements from direct TPMS systems. Because direct TPMS systems deliver a precise value of a tire characteristic (for example, tire pressure), one of the unknown parameters that influence the resonance effects can be removed. As a results, the detected resonance can be used to characterize another tire parameter that would not be accessible without knowledge of the precise value of the tire characteristic delivered by the direct TPMS system.
7 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2017 | 1 |
| 2016 | 2 |
| 2014 | 1 |
| 2013 | 4 |
| 2012 | 2 |
| 2011 | 1 |