1、PDF外文：http:/ of Integrated Motor Assist Hybrid System: Development of the Insight, a Personal Hybrid Coupe Kaoru Aoki, Shigetaka Kuroda, Shigemasa Kajiwara, Hiromitsu Sato and Yoshio Yamamoto Honda R&D Co.,Ltd. Copyright 2000 Society of Automotive Engineers, Inc. ABSTRACT
2、 This paper presents the technical approach used to design and develop the powerplant for the Honda Insight, a new motor assist hybrid vehicle with an overall development objective of just half the fuel consumption of the current Civic over a wide range of driving conditions. Fuel consumption
3、of 35km/L (Japanese 10-15 mode), and 3.4L/100km (98/69/EC) was realized. To achieve this, a new Integrated Motor Assist (IMA) hybrid power plant system was developed, incorporating many new technologies for packaging and integrating the motor assist system and for improving engine thermal efficiency
4、. This was developed in combination with a new lightweight aluminum body with low aerodynamic resistance. Environmental performance goals also included the simultaneous achievement of low emissions (half the Japanese year 2000 standards, and half the EU2000 standards), high efficiency, and recyclabi
5、lity. Full consideration was also given to key consumer attributes, including crash safety performance, handling, and driving performance. 1. INTRODUCTION To reduce the automobiles impact on society and the environment requires that it be increasingly cleaner and more energy efficient. The iss
6、ues of energy conservation, ambient air quality, and reduction in CO2 emissions are increasing raised as global environmental concerns. One solution for dealing with these issues is the hybrid automobile. Honda has developed and introduced to several major markets worldwide the Insight, a new genera
7、tion of vehicle design. The Insight combines a hybrid power train with advanced body technology features to meet an overall goal of achieving the highest fuel economy practical. The hybrid power train is a motor assist parallel configuration, termed IMA for Integrated Motor Assist. This power train
8、combines a highly efficient electric motor with a new small displacement VTEC engine, a lightweight aluminum body, and improved aerodynamics to realize 3.4L/100km (CO2:80g/km) on 98/69/EC fuel economy. Low emissions performance was also targeted with emission levels achieving the EU2000. In ad
9、dition to recapturing deceleration energy, the integrated motor provides high torque assist during typical urban driving accelerations. This allows a significant reduction in engine displacement and higher engine efficiency. Sustained hill climbing performance and high speed cruising capability are
10、assured by a power-toweight ratio of approximately 56kW per metric ton. New engine technology includes the application of a new VTEC (Variable valve Timing and valve lift, Electronic Control) cylinder head design promoting high efficiency and fast catalyst activation, and a new lean NOx catalyst sys
11、tem which promotes lean burn combustion and a reduction in emissions. Extensive friction and weight reducing features are also applied. 2. DEVELOPMENT TARGETS AND CONCEPT Development was aimed at the achievement of extremely low fuel consumption. We set a target of twice the fuel economy
12、 of the current production Civic, Hondas representative high fuel economy car at 7.0 L/100km (93/116/ EC). As a result, the Insight has the lowest fuel consumption in the world, among gasoline passenger cars. Exhaust emission performance often tends to be sacrificed for the sake of low fuel consumpt
13、ion. However, we also decided to match the low emissions performance achieved by other mass production cars. Consideration was also given to recyclability (another important environmental issue), crash safety performance, and the basic car characteristics including handling and styling. Summarizing
14、the above, our development targets were as follows: The best fuel consumption performance in the world Ultra-low exhaust emissions Superior recyclability The world's highest level of crash safety performance Advanced styling Practical features and responsive handling
15、 Comfortable two-seat configuration with personal utility space 3. POLICIES FOR FUEL CONSUMPTION REDUCTION In order to establish the technical approach for achieving the fuel consumption target, we conducted a detailed analysis of the energy consumption of the base car, a Civic equ
16、ipped with a 1.5 liter engine. We found that it was useful to divide the targeted efficiency gains roughly into thirds, as shown in Fig. 1, in order to achieve the low fuel consumption and numerous other above-mentioned goals. These divisions are as follows. Improvement of the heat efficiency
17、 of the engine itself Recovery of braking energy and employment of idle stop using a hybrid power plant Car body technologies including reduction of weight and reduced aerodynamic and rolling resistance. Figure 1. Target of double the fuel economy of CIVIC Aiming to estab
18、lish a benchmark for 21st century automobile power trains, we developed this new Integrated Motor Assist power train. This power train simultaneously achieves both extremely low fuel consumption of 3.4L/100km, and low exhaust gas emission performance, befitting a next-generation car. This pape
19、r reports on the newly developed IMA system, including the lean burn engine, electric motor, power control unit, battery technology, and exhaust emission control technology used in the "Honda Insight". 4. AIM OF THE IMA SYSTEM While developing this next-generation IMA hybrid sy
20、stem, we incorporated as many currently achievable technologies and techniques as possible, in order to achieve the "world's lowest fuel consumption". The following four system development themes were established in order to meet this target. 1. Recovery of deceleration energy 2.
21、 Improvement of the efficiency of the engine 3. Use of idle stop system 4. Reduction of power train size and weight 5. OVERVIEW OF THE IMA SYSTEM 5.1. SYSTEM CONFIGURATION As shown in Fig. 2, the IMA system uses the engine as the main power source and an electric motor as an auxiliary power source when accelerating. Using a motor as an auxiliary power source simplifies the overall system and makes it possible to use a compact and lightweight motor, battery, and power control unit (PCU).
