Abstract: A calculation unit (3) determines whether or not an operation which worsens fuel economy has been performed, and if it is determined that an operation which worsens fuel economy has been performed, the calculation unit (3) respectively calculates the actual amount of consumed fuel and an amount of fuel that would have been consumed had the operation that worsens fuel economy not been performed. The calculation unit (3) then calculates an amount of fuel consumed in excess due to the operation which worsens fuel economy by subtracting the amount of fuel that would have been consumed had the operation that worsens fuel economy not been performed from the actual amount of consumed fuel. A display (4) displays the calculated excess fuel consumption amount.

Abstract: The vehicle comprises an engine (1), a transmission (8) connected to the engine (1), a detecting device (23) for detecting the current vehicle speed, a detecting device (26) for detecting the current gear position of the transmission (8), and a controller (10). The controller (10) functions to set the difference between the maximum drive force of the vehicle at the current vehicle speed and transmission gear position, and the running resistance at the current speed as the spare drive force; to set the difference between the current drive force of the vehicle and the running resistance at the current vehicle speed as the excess drive force; and to control the engine (1) or the transmission (8) so as to reduce the ratio of the excess drive force to the spare drive force.

Abstract: An evaluation system for vehicle operating conditions which is applied to a vehicle provided with an engine (1) and a manual transmission (8) connected to the engine (1) comprises a sensor (21, 24) for detecting the operating conditions of the engine (1) and a controller (30). On the basis of the operating conditions of the engine (1), the controller (30) determines whether or not the fuel economy of the vehicle would be improved by shifting the transmission (8) upward from the current gear position to a gear position one step further toward a HIGH side, and instructs a driver to shift the transmission (8) upward when it is determined that the fuel economy of the vehicle would be improved by shifting the transmission (8) upward.

Abstract: A computing unit 3 of an analysis device 1 calculates a weight of fuel consumed by an engine 10 based on the weight of intake air and air fuel ratio of an engine of a vehicle to be analyzed detected by an air flow meter 14 and an air-fuel ratio sensor 16, and computes a fuel consumption rate based thereon and the running distance. The computation of fuel consumption rate does not require an injection pulse signal, so the fuel consumption rate can be precisely computed even for a vehicle which does not have an injection pulse signal such as a non-EGI vehicle or a diesel engine vehicle.

Abstract: The vehicle comprises an engine (1), a transmission (8) connected to the engine (1), a detecting device (23) for detecting the current vehicle speed, a detecting device (26) for detecting the current gear position of the transmission (8), and a controller (10). The controller (10) functions to set the difference between the maximum drive force of the vehicle at the current vehicle speed and transmission gear position, and the running resistance at the current speed as the spare drive force; to set the difference between the current drive force of the vehicle and the running resistance at the current vehicle speed as the excess drive force; and to control the engine (1) or the transmission (8) so as to reduce the ratio of the excess drive force to the spare drive force.

Abstract: A computing unit 3 of an analysis device 1 calculates a weight of fuel consumed by an engine 10 based on the weight of intake air and air fuel ratio of an engine of a vehicle to be analyzed detected by an air flow meter 14 and an air-fuel ratio sensor 16, and computes a fuel consumption rate based thereon and the running distance. The computation of fuel consumption rate does not require an injection pulse signal, so the fuel consumption rate can be precisely computed even for a vehicle which does not have an injection pulse signal such as a non-EGI vehicle or a diesel engine vehicle.