Lesson 23 Vehicle and Engine Analyzers

• Together with other Bosch test units (report printer, exhaust gas testers) and functional expansions such as the diesel adapter, the analyzer can be turned into a concept for diagnosis purposes: measurement, testing, diagnosis, communication, informing, training, requesting expert knowledge. The basic software comprises two areas of application: diagnosis and digital scope.
• 3.3 Characteristic Curves • The 'Characteristic curves' scope mode allows signals to be displayed in the form of a characteristic curve, the respective signal being plotted against the engine speed (rpm) or time. For example, the change in the dwell angle as the engine speed increases.
• 3.1 Ignition • The scope mode 'Ignition' can display all primary and secondary processes as single, full or raster images. For the 2-channel 2mode option, it is possible to display two different signals (e. g. the primary voltage and the primary current) simultaneously on the screen and to compare them. This allows the user to draw conclusions with respect to the ignition system.
• 2.5 Symptom • The 'Symptom' test program offers the test step known as 'Engine will not run'. In the course of a single cranking procedure, all the relevant measuring variables of an engine that will not start are determined.
Lesson 23 Vehicle and Engine Analyzers
• There are many types of vehicle system and, engine analyzers and testers manufactured by different corporations, such as Bosch, OTC, Hermann, and so on, to perform diagnostic tests and find possible location of vehicle and engine problems. The analyzers and testers have been built for trained expert personnel, such as mechanics, electricians, masters, technicians and engineers in the automotive trade.
• 6. Engine Tune-Up Tune• A tune-up is performed to return an engine tuneto its new car performance, reliability, and economy. To do this, any part that is defective must be overhauled or replaced as necessary to correct any problems diagnosed, at the same time reducing vehicle emissions to specified limits.
• 5. Computer Engine Analyzer • The modern engine analyzer consists of a set of test instruments, a computer, and a display screen. Many also have a printer to provide a printed record of specifications and test results. Although there are many different models of analyzer, their function is basically the same.
• Furthermore, the program also offers a pressure/temperature test step used for testing, e.g. the fuel pressure or the air/oil temperature. • 2.3 Electronics Test • The 'Electronics test' can be used for reading out the error memory and interactive processing of the errors with the user in vehicles equipped with systems capable of self-diagnosis, e.g. the control selfunit of the ABS.
• 2.4 Engine Analysis • 'Engine analysis' is a CompacSoft test program. It is an engine test that evaluates the test-step results and provides testinformation in plain test about the possible causes of faults.
• 2.2 Multimeter • The 'Multimeter' test program contains four test steps. A universally applicable multimeter for measuring all the electrical variables that can arise in a motor vehicle. Test steps for voltage and current analysis is displayed as an oscilloscope image and the most important technical data as measured values.
• Engine analyzers are normally used to check the following systems and performances: battery, charging system, starting system, ignition system, fuel system, emission control systems, engine condition and computer control systems.
• 3. Digital Scope • The 'Digital scope' application comprises the following oscilloscope modes: ignition, multimeter and characteristic curves. The oscilloscope operates in real-time mode with realup to 20 images per second. The legend memory always contains the last 8 seconds of the signal curve without interruption.
• 3.2 Multimeter • In scope mode 'Multimeter', it is possible to display the voltage and current curves of sensors or actuators of electronic vehicle systems. 2-channel mode offers the same 2possibilities as in the ' Ignition' scope mode.
百度文库
• 4. Engine Test Equipment • Many different kinds of test equipment are needed to perform the various engine performance tests. A brief description of the major items and their functions follows: spark tester, timing light, tachometer, electronic ignition tester, multimeter, digital voltvolt-ohmmeter, electronic fuel injection tester, scanner, computer analyzer and exhaust gas analyzer.
• 2. The Diagnosis • The ‘Diagnosis’ application contains the test program: engine test, multimeter, electronics test, engine analysis and symptom.
• 2.1 Engine Test • The ‘Engine test’ comprises all the test steps required for comprehensive testing of sparkspark-ignition and diesel engines. When running this test on diesel engine vehicles, the diesel module or diesel adapter is required. The user is prompted through the individual test steps by instructions given on the screen.
• Here the ‘FSA’vehicle system analyzer of Bosch is introduced briefly. The general concept of computer engine analyzers is also described. • 1. General Information • The‘FSA’vehicle system analyzer is a modular concept instrument designed for testing purposes in automotive workshops.